WO2014020802A1 - Radio apparatus, communication method thereof and computer-readable medium - Google Patents

Radio apparatus, communication method thereof and computer-readable medium Download PDF

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Publication number
WO2014020802A1
WO2014020802A1 PCT/JP2013/002818 JP2013002818W WO2014020802A1 WO 2014020802 A1 WO2014020802 A1 WO 2014020802A1 JP 2013002818 W JP2013002818 W JP 2013002818W WO 2014020802 A1 WO2014020802 A1 WO 2014020802A1
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Prior art keywords
value
autocorrelation
received signal
signal
peak value
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PCT/JP2013/002818
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French (fr)
Japanese (ja)
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拓志 望月
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日本電気株式会社
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Priority to JP2014527951A priority Critical patent/JP5854144B2/en
Publication of WO2014020802A1 publication Critical patent/WO2014020802A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H04L27/2663—Coarse synchronisation, e.g. by correlation

Definitions

  • the present invention can derive the input level of the true desired received signal with high accuracy even under external interference wave and interference wave input, and further suppresses errors in automatic gain control according to the input level.
  • the present invention relates to a radio apparatus capable of receiving a desired signal in various levels, a communication method thereof, and a computer-readable medium.
  • the wireless device for example, when an interference wave signal or interference wave signal transmitted from another system is mixed in the reception signal, a measurement error occurs with respect to the true reception signal level as described above, or automatic An error may occur in gain control.
  • a measurement error occurs with respect to the true reception signal level as described above, or automatic An error may occur in gain control.
  • the time multiplexing of symbols unique to the UWB method was used.
  • a wireless device that detects Symbol ⁇ ⁇ Timing and corrects reception synchronization by autocorrelation is known (see Patent Document 2), but has a different configuration and purpose from the present invention.
  • a main object is to provide a radio apparatus, a communication method thereof, and a computer-readable medium capable of receiving a desired wave in an optimum level situation by suppressing an error in automatic gain control according to the input level.
  • One aspect of the present invention for achieving the above object is a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal, the peak value of the autocorrelation value of the received signal.
  • Autocorrelation means for calculating the signal, determination means for determining whether or not the peak value of the autocorrelation value calculated by the autocorrelation means is equal to or greater than a determination threshold, and reception intensity detection for detecting the reception intensity of the received signal Means for estimating a CIR estimated value indicating a ratio of signal power to interference power based on CIR characteristic information set in advance and a peak value of the autocorrelation value calculated by the autocorrelation means;
  • the determination means determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold, the reception intensity of the received signal detected by the reception intensity detection means and the estimation means
  • a correcting means for calculating a correct input level for the received signal based on the estimated CIR value, a display unit for displaying the
  • an automatic gain control means for performing the automatic gain control is provided.
  • an aspect of the present invention for achieving the above object is a communication method for a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal.
  • a step of calculating an input level of the received signal based on the received intensity of the received signal detected when it is determined to be present and the estimated CIR estimated value; And displaying, may be a communication method for a radio apparatus, characterized in that it comprises the step of performing the automatic gain control based on the input level of the calculated received signal.
  • one aspect of the present invention for achieving the above object is a communication program for a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal.
  • a process of calculating a peak value of the correlation value, a process of determining whether or not the calculated peak value of the autocorrelation value is equal to or greater than a determination threshold, a peak value of the calculated autocorrelation value, and a preset value Processing for estimating a CIR estimated value indicating a ratio of signal power to interference power based on the CIR characteristic information, and a received signal detected when the peak value of the autocorrelation value is determined to be equal to or greater than a determination threshold value
  • a process of calculating the input level of the received signal based on the estimated CIR estimated value a process of displaying the input level to the user, and the calculated input level of the received signal
  • It may be a communication program of the wireless device, characterized in that to execute a process of performing the automatic gain control to the computer based.
  • the present invention it is possible to derive the input level of the true desired received signal with high accuracy even under an external disturbance wave or interference wave input, and further to suppress errors in automatic gain control by the input level. It is possible to provide a radio apparatus capable of receiving a desired wave in an optimum level situation, a communication method thereof, and a computer-readable medium.
  • 1 is a block diagram showing a schematic system configuration of a wireless device according to an embodiment of the present invention. It is a figure which shows the symbol format of an OFDM received signal. 1 is a block diagram showing a schematic system configuration of an autocorrelator according to an embodiment of the present invention. It is a figure which shows an example of the CIR characteristic information which shows the correlation of an autocorrelation peak value and CIR.
  • FIG. 1 is a functional block diagram of a radio apparatus according to an embodiment of the present invention.
  • Radio apparatus 1 receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal.
  • the radio apparatus 1 has an autocorrelation unit 2 that calculates a peak value of an autocorrelation value of a received signal, and a determination that determines whether or not the peak value of the autocorrelation value calculated by the autocorrelation unit 2 is equal to or greater than a determination threshold.
  • reception intensity detection means 4 for detecting the reception intensity of the received signal, peak value of the autocorrelation value calculated by the autocorrelation means 2, and signal power with respect to the interference power based on preset CIR characteristic information
  • the estimation means 5 for estimating the CIR estimation value indicating the ratio of the received signal and the reception of the received signal detected by the reception intensity detection means 4 when the determination means 3 determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold.
  • a correction means 6 for calculating the input level of the received signal based on the intensity and the CIR estimated value estimated by the estimation means 5; an automatic gain based on the input level of the received signal calculated by the correction means 6;
  • An automatic gain control means 7 for controlling.
  • the optimum AGC gain can be set. That is, it is possible to perform communication with high accuracy while suppressing errors in automatic gain control.
  • FIG. 2 is a block diagram showing a schematic system configuration of a radio apparatus according to an embodiment of the present invention.
  • a radio apparatus 10 according to the present embodiment includes an antenna 11, an amplifier 12, a mixer 13, a local oscillator 14, a variable gain unit 15, an A / D converter 16, a low-pass filter 17, and a GI removal.
  • the wireless device 10 stores, for example, a CPU (Central Processing Unit) that performs control processing, calculation processing, and the like, a ROM (Read Only Memory) that stores a control program executed by the CPU, a calculation program, processing data, and the like.
  • the microcomputer is composed mainly of a microcomputer composed of RAM (Random Access Memory) or the like for temporary storage.
  • the CPU, ROM, and RAM are connected to each other via a data bus or the like.
  • the antenna 11 is a specific example of antenna means, and receives, for example, an OFDM (Orthogonal Frequency Division Multiplexing) reception signal, a noise wave signal, an interference wave signal, an interference wave signal, or the like.
  • the antenna 11 outputs the received signal to the amplifier 12.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the amplifier 12 is a specific example of an amplifying unit, and is, for example, an LNA (Low Noise Amplifier), which amplifies the signal output from the antenna 11 and outputs the amplified signal to the mixer 13.
  • LNA Low Noise Amplifier
  • the mixer 13 is a specific example of mixing means, and mixes the signal output from the amplifier 12 and the signal output from the local oscillator 14 and outputs the mixed signal to the variable gain unit 15.
  • a quadrature demodulator QDEM may be used instead of the mixer 13, a quadrature demodulator (QDEM) may be used.
  • the local oscillator 14 generates a reference signal (an example of a predetermined reference signal) at a predetermined frequency and outputs the reference signal to the mixer 13.
  • a reference signal an example of a predetermined reference signal
  • the variable gain unit 15 is a specific example of variable gain means, and varies the gain of the built-in amplifier according to an AGC (Automatic Gain Control) control voltage output from the AGC controller 27. Thereby, even when the input level of the received signal fluctuates, the output level can be kept constant.
  • the variable gain unit 15 outputs an IF (Intermediate Frequency) signal to the A / D converter 16.
  • An A / D converter (ADC: Analog Digital Converter) 16 is a specific example of A / D conversion means, converts an analog signal output from the variable gain unit 15 into a digital signal, a low-pass filter 17, an autocorrelation Output to the device 21 and the RSSI unit 24.
  • the reception signal received by the antenna 11 is converted into a digital signal in the baseband region through the amplifier 12, the mixer 13, the variable gain unit 15, and the A / D converter 16 as described above.
  • the low-pass filter 17 passes a signal having a predetermined frequency or less from the digital signal output from the A / D converter 16 and outputs the signal to the GI removal unit 18.
  • the GI removing unit 18 removes a GI (Guard Interval) from the signal output from the low-pass filter 17 and outputs the GI (Guard Interval) to the FFT unit 19.
  • An FFT (Fast Transform) unit 19 performs a Fourier transform process on the signal output from the GI removal unit 18 and outputs the result to the demodulator 20. Note that the digital signal in the baseband region output from the A / D converter 16 is converted into primary modulated waves of a plurality of subcarriers via the low-pass filter 17, the GI removal unit 18, and the FFT unit 19, as described above. The frequency is decomposed and input to the demodulator 20.
  • the demodulator 20 performs demodulation processing on the signal output from the FFT unit 19.
  • the RSSI unit 24 is a specific example of reception strength detection means, detects an RSSI (Received Signal Strength Indication) value from the signal output from the A / D converter 16, and Output.
  • the autocorrelator 21 is a specific example of the autocorrelation means, and performs autocorrelation processing on the signal output from the A / D converter 16.
  • FIG. 3 is a diagram showing a symbol format of the OFDM received signal.
  • the autocorrelator 21 performs autocorrelation processing as will be described later, focusing on the periodicity of the GI copy in each symbol (Symbol) in the OFDM received signal.
  • FIG. 4 is a block diagram showing a schematic system configuration of the autocorrelator according to the present embodiment.
  • the autocorrelator 21 according to the present embodiment includes a delay unit 211 and an autocorrelation calculator 212.
  • the delay unit 211 delays the signal output from the A / D converter 16 and outputs the delayed signal to the autocorrelation calculator 212 as a delayed wave signal.
  • the autocorrelation calculator 212 calculates the autocorrelation between the delayed wave signal output from the delay unit 211 and the main wave signal output from the A / D converter 16, and the peak value of the autocorrelation value (hereinafter referred to as autocorrelation). (Referred to as a peak value).
  • the autocorrelation calculator 212 outputs the calculated autocorrelation peak value to the determiner 22.
  • the determiner 22 is a specific example of a determination unit, and determines whether or not the autocorrelation peak value output from the autocorrelation calculator 212 is equal to or greater than a determination threshold value.
  • the determiner 22 outputs an ON signal to the switch unit 25 when determining that the autocorrelation peak value is greater than or equal to the determination threshold.
  • the determiner 22 outputs an off signal to the switch unit 25 when determining that the autocorrelation peak value is smaller than the determination threshold.
  • the switch unit 25 is a specific example of a switch unit, and is turned on in response to an on signal from the determiner 22, and outputs the RSSI value output from the RSSI unit 24 to the RSSI corrector 26. On the other hand, the switch unit 25 is turned off in response to the off signal from the determiner 22 and does not output the RSSI value output from the RSSI unit 24 to the RSSI corrector 26.
  • the determiner 22 controls the delay amount by outputting a control signal to the delay unit 211. For example, when the determination unit 22 determines that the autocorrelation peak value exceeds the determination threshold, the determination unit 22 performs delay amount control so that the delay amount of the delay unit 211 is held while the autocorrelation peak value is equal to or greater than the determination threshold.
  • ⁇ Determinator 22 outputs the autocorrelation peak value from autocorrelator 21 to CIR estimator 23.
  • a CIR (Carrier-to-Interference-Ratio) estimator 23 is a specific example of an estimator, and is based on the autocorrelation peak value output from the determiner 22 and preset CIR characteristic information.
  • a CIR estimated value [dB] indicating the ratio of signal power is estimated.
  • the CIR characteristic information is, for example, information indicating the correlation between the autocorrelation peak value and the CIR as shown in FIG.
  • the CIR estimator 23 outputs the estimated CIR estimated value to the RSSI corrector 26.
  • the RSSI corrector 26 outputs the calculated received signal input level to the AGC controller 27 and the display 28.
  • the AGC controller 27 is a specific example of the automatic gain control means, generates an AGC control voltage for controlling the variable gain unit 15 based on the received signal input level output from the RSSI corrector 26, and is variable. Output to the gain unit 15.
  • the gain of the variable gain device 15 is not affected by noise such as noise waves, interference waves, and interference waves, and is based on the true received signal input level and the gain from the antenna 11 to the A / D converter 16.
  • the AGC control is performed so that the received signal level after the A / D converter 16 is within a certain range.
  • the display 28 displays the received signal input level output from the RSSI corrector 26 to the user as a reception status report.
  • the display device 28 includes, for example, a liquid crystal display device, an organic or inorganic EL display device, and a display on a computer externally connected to the device.
  • radio apparatus 10 for example, there are interference wave signals, jamming wave signals, and the like from other systems that interfere with reception signal input level constantly rising. Even in this case, the optimum AGC gain can be set based on the true received signal input level.
  • the gain setting is performed in the variable gain unit 15 so as not to saturate the A / D converter 16 over the entire interference level. Demodulation is performed while allowing degradation of in-band interference.
  • gain control is performed in the variable gain unit 15 using the true received signal, and the level convergence after the A / D converter 16 should be set to the optimum level. AGC control is performed. For this reason, the received signal can be guided to the A / D converter 16 and later in the highest C / N state. That is, it is possible to perform communication with high accuracy while suppressing errors in automatic gain control.
  • the present invention also includes the amplifier 12, the mixer 13, the local oscillator 14, the variable gain unit 15, the A / D converter 16, the low-pass filter 17, the GI removing unit 18, the FFT unit 19, the demodulator 20, and the autocorrelator. 21, the determination unit 22, the CIR estimator 23, the RSSI unit 24, the switch unit 25, the RSSI corrector 26, the AGC controller 27, and the like can be realized by causing the CPU to execute a computer program. is there.
  • Non-transitory computer readable media include various types of tangible storage media (tangible storage medium).
  • Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (random access memory)) are included.
  • the program may be supplied to the computer by various types of temporary computer readable media.
  • Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • a radio apparatus that receives an orthogonal frequency division multiplexed signal and performs automatic gain control on the received signal, Autocorrelation means for calculating a peak value of the autocorrelation value of the received signal; Determination means for determining whether or not the peak value of the autocorrelation value calculated by the autocorrelation means is greater than or equal to a determination threshold; Reception intensity detection means for detecting the reception intensity of the received signal; Estimating means for estimating a CIR estimated value indicating a ratio of signal power to interference power based on a peak value of the autocorrelation value calculated by the autocorrelation means and preset CIR characteristic information; The reception intensity of the received signal detected by the reception intensity detection means when the determination means determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold, and the CIR estimation value estimated by the estimation means Correction means for calculating the input level of the received signal based on the display, display means for displaying the correction input level to the user,
  • a radio apparatus comprising: automatic
  • the radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of the autocorrelation value in the received signal using a periodicity of a guard interval copy in a plurality of symbols.
  • the autocorrelation means includes A delay unit that delays the digitized received signal to generate a delayed wave signal; An autocorrelation calculator that calculates a peak value of the autocorrelation value by performing autocorrelation between the delayed wave signal from the delayer and the main wave signal that is the digitized reception signal;
  • a wireless device comprising: (Appendix 4) A wireless device according to any one of (Appendix 1) to (Appendix 3), In the CIR characteristic information, as the intensity of the peak value of the autocorrelation value of the received signal increases, the D / U ratio of the interference wave (Interferer) is ensured as compared with the desired received signal (Carrier), and the CIR value is A
  • (Appendix 5) A wireless device according to any one of (Appendix 1) to (Appendix 4), When the determination means determines that the peak value of the autocorrelation value is greater than or equal to a determination threshold, the ON state outputs the reception strength of the received signal from the reception strength detection means to the correction means, and the determination means When it is determined that the peak value of the autocorrelation value is smaller than a determination threshold value, switch means for switching to an off state in which the reception intensity of the received signal from the reception intensity detection means is not output to the correction means is further provided.
  • (Appendix 6) A wireless device according to any one of (Appendix 1) to (Appendix 5), Antenna means for receiving the received signal; Amplifying means for amplifying the received signal received by the antenna means; Mixing means for mixing the received signal amplified by the amplifying means with a predetermined reference signal; Variable gain means for varying the gain according to a control signal from the automatic gain control means, and varying the signal mixed by the mixing means; A / D conversion means for converting the analog signal variable by the variable gain means into a digital signal, The radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of an autocorrelation value for the digital signal from the A / D conversion means.
  • a communication program for a wireless device that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal, Processing for calculating a peak value of the autocorrelation value of the received signal; A process for determining whether or not a peak value of the calculated autocorrelation value is equal to or greater than a determination threshold; A process of estimating a peak value of the calculated autocorrelation value and a CIR estimation value indicating a ratio of signal power to interference power based on preset CIR characteristic information; A process of calculating a reception intensity of a received signal detected when it is determined that a peak value of the autocorrelation value is equal to or greater than a determination threshold, and an input level of the received signal based on the estimated CIR estimated value; , Displaying that input level to the user, A wireless device communication program causing a computer to execute a process of performing the automatic gain control based on the calculated input level of the received signal.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

A radio apparatus receives OFDM signals and performs automatic gain control of the received signals. A radio apparatus comprises: an autocorrelation means that calculates the peak value of the autocorrelation value of a received signal; a reception intensity detection means that detects the reception intensity of the received signal; an estimation means that estimates a CIR estimation value on the basis of both the peak value of the autocorrelation value calculated by the autocorrelation means and predetermined CIR characteristic information; a correction means that, when a determination means determines that the peak value of the autocorrelation value is equal to or greater than a determination threshold value, calculates an input level of the received signal on the basis of both the reception intensity of the received signal detected by the reception intensity detection means and the CIR estimation value estimated by the estimation means; a display unit that presents the corrected input level to a user; and an automatic gain control means that performs an automatic gain control on the basis of the input level of the received signal calculated by the correction means.

Description

無線装置、その通信方法及びコンピュータ可読媒体Wireless device, communication method thereof, and computer-readable medium
　本発明は、外来する妨害波や干渉波入力下でも、高精度に真の希望受信信号の入力レベルを導出する事ができ、更にその入力レベルにより自動利得制御における誤差を抑制する事で、最適なレベル状況で希望波受信を行うことができる無線装置、その通信方法及びコンピュータ可読媒体に関するものである。 The present invention can derive the input level of the true desired received signal with high accuracy even under external interference wave and interference wave input, and further suppresses errors in automatic gain control according to the input level. The present invention relates to a radio apparatus capable of receiving a desired signal in various levels, a communication method thereof, and a computer-readable medium.
　無線装置において、建物等の遮蔽物によるゴースト妨害（フェージング、マルチパス）が課題となっている。近年、このような課題の克服に適した送信データの変調方式として、ＯＦＤＭ（直交周波数分割多重：Orthogonal Frequency Division Multiplexing）信号を用いた変復調方式が注目されている。例えば、外部から送信される信号を受信し、その受信信号に対して自動利得制御（ＡＧＣ：Automatic Gain Control）を行う無線装置が知られている（特許文献１参照）。なお、この特許文献１ではAGC誤差がRSSI（Received Signal Strength Indication）に重畳するDC Offsetによるものとして、従来の手動調整に対し、TDDシステムであれば送受リーク信号を用いて、DC Offset込みのRSSI特性とAGCテーブルを自動生成させて制御する事を特徴としているが、本願発明の様に、外来他システムからの妨害波・干渉波によるRSSI誤差やAGC誤差は考慮されていない。 In a wireless device, ghost obstruction (fading, multipath) due to a shield such as a building is a problem. In recent years, modulation / demodulation methods using OFDM (Orthogonal Frequency Division Multiplexing) signals have attracted attention as transmission data modulation methods suitable for overcoming such problems. For example, a wireless device that receives a signal transmitted from the outside and performs automatic gain control (AGC) on the received signal is known (see Patent Document 1). In this patent document 1, the AGC error is based on DC Offset in which the AGC error is superimposed on RSSI (Received Signal Strength Indication). In contrast to the conventional manual adjustment, the TDD system uses a transmission / reception leak signal and RSSI including DC Offset. It is characterized in that the characteristics and the AGC table are automatically generated and controlled. However, unlike the present invention, RSSI errors and AGC errors due to interference waves and interference waves from other external systems are not considered.
特開２００９－１９４８３６号公報JP 2009-194836 A 特開２００８－１９３２９７号公報JP 2008-193297 A
　上記無線装置においては、例えば、他のシステムから送信される妨害波信号や干渉波信号が受信信号に混入した場合、上記した様に真の受信信号レベルに対して測定誤差が発生したり、自動利得制御において誤差が発生することがある。なお、Symbol内コピーで周期信号として捉えられるCyclic PrefixをGuard Intervalとして持たない、Zero-Padding方式のOFDM信号受信（Multiband-OFDM UWB）の場合で、同UWB方式特有のSymbolの時間多重を利用した自己相関により、Symbol Timingの検出を行い、受信同期補正を行う無線装置が知られているが（特許文献２参照）、本願発明とは構成および目的が相違している。 In the wireless device, for example, when an interference wave signal or interference wave signal transmitted from another system is mixed in the reception signal, a measurement error occurs with respect to the true reception signal level as described above, or automatic An error may occur in gain control. In the case of Zero-Padding OFDM signal reception (Multiband-OFDM UWB) that does not have a Cyclic Prefix that can be captured as a periodic signal by copying within the Symbol as a Guard Interval, the time multiplexing of symbols unique to the UWB method was used. A wireless device that detects Symbol 行 う Timing and corrects reception synchronization by autocorrelation is known (see Patent Document 2), but has a different configuration and purpose from the present invention.
　本発明は、このような問題点を解決するためになされたものであり、外来する妨害波や干渉波入力下でも、高精度に真の希望受信信号の入力レベルを導出する事ができ、更にその入力レベルにより自動利得制御における誤差を抑制する事で、最適なレベル状況で希望波受信を行うことができる無線装置、その通信方法及びコンピュータ可読媒体を提供することを主たる目的とする。 The present invention has been made in order to solve such problems, and can accurately derive the input level of a true desired received signal even under an external disturbance wave or interference wave input. A main object is to provide a radio apparatus, a communication method thereof, and a computer-readable medium capable of receiving a desired wave in an optimum level situation by suppressing an error in automatic gain control according to the input level.
　上記目的を達成するための本発明の一態様は、直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置であって、前記受信信号の自己相関値のピーク値を算出する自己相関手段と、前記自己相関手段により算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する判定手段と、前記受信信号の受信強度を検出する受信強度検出手段と、前記自己相関手段により算出された前記自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する推定手段と、前記判定手段により前記自己相関値のピーク値が判定閾値以上であると判定されたときに前記受信強度検出手段により検出された受信信号の受信強度と、前記推定手段により推定された前記ＣＩＲ推定値に基いて前記受信信号について正しい入力レベルを算出する補正手段と、同補正入力レベルをユーザーに表示する表示部と、前記補正手段により算出された受信信号の入力レベルに基いて前記自動利得制御を行う自動利得制御手段とを備えることを特徴とする無線装置である。
　他方、上記目的を達成するための本発明の一態様は、直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置の通信方法であって、前記受信信号の自己相関値のピーク値を算出するステップと、前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定するステップと、前記受信信号の受信強度を検出するステップと、前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定するステップと、前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出するステップと、その入力レベルをユーザーに表示するステップと、前記算出された受信信号の入力レベルに基いて前記自動利得制御を行うステップを含むことを特徴とする無線装置の通信方法であってもよい。
　さらに、上記目的を達成するための本発明の一態様は、直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置の通信プログラムであって、前記受信信号の自己相関値のピーク値を算出する処理と、前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する処理と、前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する処理と、前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出する処理と、その入力レベルをユーザーに表示する処理と、前記算出された受信信号の入力レベルに基いて前記自動利得制御を行う処理をコンピュータに実行させることを特徴とする無線装置の通信プログラムであってもよい。 One aspect of the present invention for achieving the above object is a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal, the peak value of the autocorrelation value of the received signal. Autocorrelation means for calculating the signal, determination means for determining whether or not the peak value of the autocorrelation value calculated by the autocorrelation means is equal to or greater than a determination threshold, and reception intensity detection for detecting the reception intensity of the received signal Means for estimating a CIR estimated value indicating a ratio of signal power to interference power based on CIR characteristic information set in advance and a peak value of the autocorrelation value calculated by the autocorrelation means; When the determination means determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold, the reception intensity of the received signal detected by the reception intensity detection means and the estimation means Further, a correcting means for calculating a correct input level for the received signal based on the estimated CIR value, a display unit for displaying the corrected input level to the user, and an input level of the received signal calculated by the correcting means. An automatic gain control means for performing the automatic gain control is provided.
On the other hand, an aspect of the present invention for achieving the above object is a communication method for a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal. A step of calculating a peak value of the correlation value; a step of determining whether or not the calculated peak value of the autocorrelation value is equal to or greater than a determination threshold; a step of detecting a reception intensity of the received signal; and the calculation Estimating a CIR estimated value indicating a ratio of signal power to interference power based on preset CIR characteristic information, and a peak value of the autocorrelation value is equal to or greater than a determination threshold value A step of calculating an input level of the received signal based on the received intensity of the received signal detected when it is determined to be present and the estimated CIR estimated value; And displaying, may be a communication method for a radio apparatus, characterized in that it comprises the step of performing the automatic gain control based on the input level of the calculated received signal.
Furthermore, one aspect of the present invention for achieving the above object is a communication program for a radio apparatus that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal. A process of calculating a peak value of the correlation value, a process of determining whether or not the calculated peak value of the autocorrelation value is equal to or greater than a determination threshold, a peak value of the calculated autocorrelation value, and a preset value Processing for estimating a CIR estimated value indicating a ratio of signal power to interference power based on the CIR characteristic information, and a received signal detected when the peak value of the autocorrelation value is determined to be equal to or greater than a determination threshold value Of the received signal, a process of calculating the input level of the received signal based on the estimated CIR estimated value, a process of displaying the input level to the user, and the calculated input level of the received signal It may be a communication program of the wireless device, characterized in that to execute a process of performing the automatic gain control to the computer based.
　本発明によれば、外来する妨害波や干渉波入力下でも、高精度に真の希望受信信号の入力レベルを導出する事ができ、更にその入力レベルにより自動利得制御における誤差を抑制する事で、最適なレベル状況で希望波受信を行うことができる無線装置、その通信方法及びコンピュータ可読媒体を提供することができる。 According to the present invention, it is possible to derive the input level of the true desired received signal with high accuracy even under an external disturbance wave or interference wave input, and further to suppress errors in automatic gain control by the input level. It is possible to provide a radio apparatus capable of receiving a desired wave in an optimum level situation, a communication method thereof, and a computer-readable medium.
本発明の一実施の形態に係る無線装置の機能ブロック図である。It is a functional block diagram of the radio | wireless apparatus which concerns on one embodiment of this invention. 本発明の一実施の形態に係る無線装置の概略的なシステム構成を示すブロック図である。1 is a block diagram showing a schematic system configuration of a wireless device according to an embodiment of the present invention. ＯＦＤＭ受信信号のシンボルフォーマットを示す図である。It is a figure which shows the symbol format of an OFDM received signal. 本発明の一実施の形態に係る自己相関器の概略的なシステム構成を示すブロック図である。1 is a block diagram showing a schematic system configuration of an autocorrelator according to an embodiment of the present invention. 自己相関ピーク値とＣＩＲとの相関関係を示すＣＩＲ特性情報の一例を示す図である。It is a figure which shows an example of the CIR characteristic information which shows the correlation of an autocorrelation peak value and CIR.
　実施の形態
　以下、図面を参照して本発明の実施の形態について説明する。図１は、本発明の一実施の形態に係る無線装置の機能ブロック図である。本実施の形態に係る無線装置１は、直交周波数分割多重信号を受信し、その受信信号に対して自動利得制御を行う。無線装置１は、受信信号の自己相関値のピーク値を算出する自己相関手段２と、自己相関手段２により算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する判定手段３と、受信信号の受信強度を検出する受信強度検出手段４と、自己相関手段２により算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する推定手段５と、判定手段３により自己相関値のピーク値が判定閾値以上であると判定されたときに受信強度検出手段４により検出された受信信号の受信強度と、推定手段５により推定された前記ＣＩＲ推定値に基いて受信信号の入力レベルを算出する補正手段６と、補正手段６により算出された受信信号の入力レベルに基いて自動利得制御を行う自動利得制御手段７を備える。 Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of a radio apparatus according to an embodiment of the present invention. Radio apparatus 1 according to the present embodiment receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal. The radio apparatus 1 has an autocorrelation unit 2 that calculates a peak value of an autocorrelation value of a received signal, and a determination that determines whether or not the peak value of the autocorrelation value calculated by the autocorrelation unit 2 is equal to or greater than a determination threshold. Means 3, reception intensity detection means 4 for detecting the reception intensity of the received signal, peak value of the autocorrelation value calculated by the autocorrelation means 2, and signal power with respect to the interference power based on preset CIR characteristic information The estimation means 5 for estimating the CIR estimation value indicating the ratio of the received signal and the reception of the received signal detected by the reception intensity detection means 4 when the determination means 3 determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold. A correction means 6 for calculating the input level of the received signal based on the intensity and the CIR estimated value estimated by the estimation means 5; an automatic gain based on the input level of the received signal calculated by the correction means 6; An automatic gain control means 7 for controlling.
　これにより、例えば、恒常的に受信信号入力レベルが上がったままの状態で混信する他システムからの干渉波信号や妨害波信号等が存在する場合でも、真の受信信号入力レベルをユーザーに表示し、それに基いて最適なＡＧＣ利得を設定ができる。すなわち、自動利得制御における誤差を抑制し高精度に通信を行うことができる。 As a result, for example, even when there is an interference wave signal or interference signal from another system that interferes with the reception signal input level constantly rising, the true reception signal input level is displayed to the user. Based on this, the optimum AGC gain can be set. That is, it is possible to perform communication with high accuracy while suppressing errors in automatic gain control.
　図２は、本発明の一実施の形態に係る無線装置の概略的なシステム構成を示すブロック図である。本実施の形態に係る無線装置１０は、アンテナ１１と、増幅器１２と、混合器１３と、局部発振器１４と、可変利得部１５と、Ａ／Ｄ変換器１６と、ローパスフィルタ１７と、ＧＩ除去部１８と、ＦＦＴ部１９と、復調器２０と、自己相関器２１と、判定器２２と、ＣＩＲ推定器２３と、ＲＳＳＩ部２４と、スイッチ部２５と、ＲＳＳＩ補正器２６と、ＡＧＣ制御器２７と、表示器２８と、を備えている。 FIG. 2 is a block diagram showing a schematic system configuration of a radio apparatus according to an embodiment of the present invention. A radio apparatus 10 according to the present embodiment includes an antenna 11, an amplifier 12, a mixer 13, a local oscillator 14, a variable gain unit 15, an A / D converter 16, a low-pass filter 17, and a GI removal. Unit 18, FFT unit 19, demodulator 20, autocorrelator 21, determiner 22, CIR estimator 23, RSSI unit 24, switch unit 25, RSSI corrector 26, and AGC controller 27 and a display 28.
　なお、無線装置１０は、例えば、制御処理、演算処理等と行うＣＰＵ（Central Processing Unit）、ＣＰＵによって実行される制御プログラム、演算プログラム等が記憶されたＲＯＭ（Read Only Memory）、処理データ等を一時的に記憶するＲＡＭ（Random Access Memory）等からなるマイクロコンピュータを、中心にしてハードウェア構成されている。ＣＰＵ、ＲＯＭ、及びＲＡＭは、データバスなどを介して相互に接続されている。 Note that the wireless device 10 stores, for example, a CPU (Central Processing Unit) that performs control processing, calculation processing, and the like, a ROM (Read Only Memory) that stores a control program executed by the CPU, a calculation program, processing data, and the like. The microcomputer is composed mainly of a microcomputer composed of RAM (Random Access Memory) or the like for temporary storage. The CPU, ROM, and RAM are connected to each other via a data bus or the like.
　アンテナ１１は、アンテナ手段の一具体例であり、例えば、ＯＦＤＭ（Orthogonal Frequency Division Multiplexing:直交周波数分割多重）受信信号、雑音波信号、妨害波信号、干渉波信号などが入力される。アンテナ１１は受信した信号を増幅器１２に対して出力する。 The antenna 11 is a specific example of antenna means, and receives, for example, an OFDM (Orthogonal Frequency Division Multiplexing) reception signal, a noise wave signal, an interference wave signal, an interference wave signal, or the like. The antenna 11 outputs the received signal to the amplifier 12.
　増幅器１２は、増幅手段の一具体例であり、例えば、ＬＮＡ（Low Noise Amplifier）であり、アンテナ１１から出力された信号を増幅し、混合器１３に対して出力する。 The amplifier 12 is a specific example of an amplifying unit, and is, for example, an LNA (Low Noise Amplifier), which amplifies the signal output from the antenna 11 and outputs the amplified signal to the mixer 13.
　混合器１３は、混合手段の一具体例であり、増幅器１２から出力される信号と局部発振器１４から出力される信号とを混合し、可変利得部１５に対して出力する。なお、混合器１３の代わりに、直交復調器（ＱＤＥＭ）を用いてもよい。 The mixer 13 is a specific example of mixing means, and mixes the signal output from the amplifier 12 and the signal output from the local oscillator 14 and outputs the mixed signal to the variable gain unit 15. Instead of the mixer 13, a quadrature demodulator (QDEM) may be used.
　局部発振器１４は、所定周波数で基準信号（所定の基準信号の一例）を生成し混合器１３に対して出力する。 The local oscillator 14 generates a reference signal (an example of a predetermined reference signal) at a predetermined frequency and outputs the reference signal to the mixer 13.
　可変利得部１５は、可変利得手段の一具体例であり、ＡＧＣ制御器２７から出力されるＡＧＣ（Automatic Gain Control）制御電圧に従って、内蔵アンプのゲインを可変させる。これにより、受信信号の入力レベルが変動した場合でもその出力レベルを一定に保つことができる。可変利得部１５は、ＩＦ（Intermediate Frequency：中間周波数）信号をＡ／Ｄ変換器１６に対して出力する。 The variable gain unit 15 is a specific example of variable gain means, and varies the gain of the built-in amplifier according to an AGC (Automatic Gain Control) control voltage output from the AGC controller 27. Thereby, even when the input level of the received signal fluctuates, the output level can be kept constant. The variable gain unit 15 outputs an IF (Intermediate Frequency) signal to the A / D converter 16.
　Ａ／Ｄ変換器（ＡＤＣ：Analog Digital Converter）１６は、Ａ／Ｄ変換手段の一具体例であり、可変利得部１５から出力されるアナログ信号をデジタル信号を変換し、ローパスフィルタ１７、自己相関器２１、及びＲＳＳＩ部２４に対して出力する。なお、アンテナ１１で受信された受信信号は、上述の如く、増幅器１２、混合器１３、可変利得部１５、及びＡ／Ｄ変換器１６を介してベースバンド領域のデジタル信号に変換されている。 An A / D converter (ADC: Analog Digital Converter) 16 is a specific example of A / D conversion means, converts an analog signal output from the variable gain unit 15 into a digital signal, a low-pass filter 17, an autocorrelation Output to the device 21 and the RSSI unit 24. The reception signal received by the antenna 11 is converted into a digital signal in the baseband region through the amplifier 12, the mixer 13, the variable gain unit 15, and the A / D converter 16 as described above.
　ローパスフィルタ１７は、Ａ／Ｄ変換器１６から出力されたデジタル信号のうち所定周波数以下の信号を通過させ、ＧＩ除去部１８に対して出力する。 The low-pass filter 17 passes a signal having a predetermined frequency or less from the digital signal output from the A / D converter 16 and outputs the signal to the GI removal unit 18.
　ＧＩ除去部１８は、ローパスフィルタ１７から出力された信号からＧＩ（Guard Interval：ガードインターバル）を除去し、ＦＦＴ部１９に対して出力する。 The GI removing unit 18 removes a GI (Guard Interval) from the signal output from the low-pass filter 17 and outputs the GI (Guard Interval) to the FFT unit 19.
　ＦＦＴ（Fast Fourier Transform）部１９は、ＧＩ除去部１８から出力された信号に対してフーリエ変換処理を行い、復調器２０に対して出力する。なお、Ａ／Ｄ変換器１６から出力されたベースバンド領域のデジタル信号は、上述の如く、ローパスフィルタ１７、ＧＩ除去部１８、及びＦＦＴ部１９を介して、複数のサブキャリアの一次変調波に周波数分解され、復調器２０に入力される。 An FFT (Fast Transform) unit 19 performs a Fourier transform process on the signal output from the GI removal unit 18 and outputs the result to the demodulator 20. Note that the digital signal in the baseband region output from the A / D converter 16 is converted into primary modulated waves of a plurality of subcarriers via the low-pass filter 17, the GI removal unit 18, and the FFT unit 19, as described above. The frequency is decomposed and input to the demodulator 20.
　復調器２０は、ＦＦＴ部１９から出力された信号に対して復調処理を行う。
　ＲＳＳＩ部２４は、受信強度検出手段の一具体例であり、Ａ／Ｄ変換器１６から出力された信号からＲＳＳＩ（Received Signal Strength Indication：受信信号強度）値を検出し、スイッチ部２５に対して出力する。 The demodulator 20 performs demodulation processing on the signal output from the FFT unit 19.
The RSSI unit 24 is a specific example of reception strength detection means, detects an RSSI (Received Signal Strength Indication) value from the signal output from the A / D converter 16, and Output.
　自己相関器２１は、自己相関手段の一具体例であり、Ａ／Ｄ変換器１６から出力された信号に対して自己相関処理を行う。図３は、ＯＦＤＭ受信信号のシンボルフォーマットを示す図である。自己相関器２１は、ＯＦＤＭ受信信号において、各シンボル（Symbol）内のＧＩコピーの周期性に着目して、後述の如く、自己相関処理を行う。 The autocorrelator 21 is a specific example of the autocorrelation means, and performs autocorrelation processing on the signal output from the A / D converter 16. FIG. 3 is a diagram showing a symbol format of the OFDM received signal. The autocorrelator 21 performs autocorrelation processing as will be described later, focusing on the periodicity of the GI copy in each symbol (Symbol) in the OFDM received signal.
　図４は、本実施の形態に係る自己相関器の概略的なシステム構成を示すブロック図である。本実施の形態に係る自己相関器２１は、遅延器２１１と、自己相関演算器２１２と、を有している。 FIG. 4 is a block diagram showing a schematic system configuration of the autocorrelator according to the present embodiment. The autocorrelator 21 according to the present embodiment includes a delay unit 211 and an autocorrelation calculator 212.
　遅延器２１１は、Ａ／Ｄ変換器１６から出力された信号を遅延させ、遅延波信号として自己相関演算器２１２に対して出力する。 The delay unit 211 delays the signal output from the A / D converter 16 and outputs the delayed signal to the autocorrelation calculator 212 as a delayed wave signal.
　自己相関演算器２１２は、遅延器２１１から出力される遅延波信号とＡ／Ｄ変換器１６から出力される主波信号との自己相関をとり、その自己相関値のピーク値（以下、自己相関ピーク値を称す）を算出する。自己相関演算器２１２は算出した自己相関ピーク値を判定器２２に対して出力する。 The autocorrelation calculator 212 calculates the autocorrelation between the delayed wave signal output from the delay unit 211 and the main wave signal output from the A / D converter 16, and the peak value of the autocorrelation value (hereinafter referred to as autocorrelation). (Referred to as a peak value). The autocorrelation calculator 212 outputs the calculated autocorrelation peak value to the determiner 22.
　判定器２２は、判定手段の一具体例であり、自己相関演算器２１２から出力される自己相関ピーク値が判定閾値以上であるか否かを判定する。判定器２２は、自己相関ピーク値が判定閾値以上であると判定したとき、スイッチ部２５に対してオン信号を出力する。一方、判定器２２は、自己相関ピーク値が判定閾値より小さいと判定したとき、スイッチ部２５に対してオフ信号を出力する。 The determiner 22 is a specific example of a determination unit, and determines whether or not the autocorrelation peak value output from the autocorrelation calculator 212 is equal to or greater than a determination threshold value. The determiner 22 outputs an ON signal to the switch unit 25 when determining that the autocorrelation peak value is greater than or equal to the determination threshold. On the other hand, the determiner 22 outputs an off signal to the switch unit 25 when determining that the autocorrelation peak value is smaller than the determination threshold.
　スイッチ部２５は、スイッチ手段の一具体例であり、判定器２２からのオン信号に応じてオン状態となり、ＲＳＳＩ部２４から出力されたＲＳＳＩ値をＲＳＳＩ補正器２６に対して出力する。一方、スイッチ部２５は、判定器２２からのオフ信号に応じてオフ状態となり、ＲＳＳＩ部２４から出力されたＲＳＳＩ値をＲＳＳＩ補正器２６に対して出力しない。 The switch unit 25 is a specific example of a switch unit, and is turned on in response to an on signal from the determiner 22, and outputs the RSSI value output from the RSSI unit 24 to the RSSI corrector 26. On the other hand, the switch unit 25 is turned off in response to the off signal from the determiner 22 and does not output the RSSI value output from the RSSI unit 24 to the RSSI corrector 26.
　なお、判定器２２は、遅延器２１１に対して制御信号を出力することで遅延量制御を行う。判定器２２は、例えば自己相関ピーク値が判定閾値を超えたと判定したとき、自己相関ピーク値が判定閾値以上の間、遅延器２１１の遅延量を保持するような遅延量制御を行う。 Note that the determiner 22 controls the delay amount by outputting a control signal to the delay unit 211. For example, when the determination unit 22 determines that the autocorrelation peak value exceeds the determination threshold, the determination unit 22 performs delay amount control so that the delay amount of the delay unit 211 is held while the autocorrelation peak value is equal to or greater than the determination threshold.
　判定器２２は、自己相関器２１からの自己相関ピーク値をＣＩＲ推定器２３に対して出力する。 判定 Determinator 22 outputs the autocorrelation peak value from autocorrelator 21 to CIR estimator 23.
　ＣＩＲ（Carrier to Interference Ratio）推定器２３は、推定手段の一具体例であり、判定器２２から出力された自己相関ピーク値と、予め設定されたＣＩＲ特性情報と、に基いて、干渉電力に対する信号電力の比を示すＣＩＲ推定値［ｄＢ］を推定する。ＣＩＲ特性情報は、例えば、図５に示すように自己相関ピーク値とＣＩＲの相関関係を示す情報である。ＣＩＲ推定器２３は、推定したＣＩＲ推定値をＲＳＳＩ補正器２６に対して出力する。 A CIR (Carrier-to-Interference-Ratio) estimator 23 is a specific example of an estimator, and is based on the autocorrelation peak value output from the determiner 22 and preset CIR characteristic information. A CIR estimated value [dB] indicating the ratio of signal power is estimated. The CIR characteristic information is, for example, information indicating the correlation between the autocorrelation peak value and the CIR as shown in FIG. The CIR estimator 23 outputs the estimated CIR estimated value to the RSSI corrector 26.
　ＲＳＳＩ補正器２６は、補正手段の一具体例であり、スイッチ部２５から出力されるＲＳＳＩ値と、ＣＩＲ推定器２３から出力されるＣＩＲ推定値と、に基いて下記式を用いて受信信号入力レベルを算出する。
　　　受信信号入力レベル［ｄＢｍ］
　　　＝ＲＳＳＩ［ｄＢｍ］－１０Ｌｏｇ（１＋１０（－ＣＩＲ［ｄＢ］／１０）） The RSSI corrector 26 is a specific example of a correction unit. Based on the RSSI value output from the switch unit 25 and the CIR estimated value output from the CIR estimator 23, the received signal is input using the following equation. Calculate the level.
Received signal input level [dBm]
= RSSI [dBm] -10 Log (1 + 10 (-CIR [dB] / 10) )
　ＲＳＳＩ補正器２６は、算出した受信信号入力レベルをＡＧＣ制御器２７及び表示器２８に対して出力する。 The RSSI corrector 26 outputs the calculated received signal input level to the AGC controller 27 and the display 28.
　ＡＧＣ制御器２７は、自動利得制御手段の一具体例であり、ＲＳＳＩ補正器２６から出力された受信信号入力レベルに基いて、可変利得部１５を制御するためのＡＧＣ制御電圧を生成し、可変利得部１５に対して出力する。 The AGC controller 27 is a specific example of the automatic gain control means, generates an AGC control voltage for controlling the variable gain unit 15 based on the received signal input level output from the RSSI corrector 26, and is variable. Output to the gain unit 15.
　これにより可変利得器１５のゲインは、雑音波、妨害波、干渉波などのノイズに影響されることなく、真の受信信号入力レベルとアンテナ１１からＡ／Ｄ変換器１６までの利得とに基いて、Ａ／Ｄ変換器１６後の受信信号レベルが一定の範囲内に収まる様にＡＧＣ制御される。 As a result, the gain of the variable gain device 15 is not affected by noise such as noise waves, interference waves, and interference waves, and is based on the true received signal input level and the gain from the antenna 11 to the A / D converter 16. The AGC control is performed so that the received signal level after the A / D converter 16 is within a certain range.
　表示器２８は、ＲＳＳＩ補正器２６から出力された受信信号入力レベルを受信状況報告としてユーザに対して表示する。表示器２８は、例えば、液晶ディスプレイ装置や有機或いは無機ＥＬディスプレイ装置などで構成されている他、装置に外部接続されるコンピュータ上のディスプレイを含む。 The display 28 displays the received signal input level output from the RSSI corrector 26 to the user as a reception status report. The display device 28 includes, for example, a liquid crystal display device, an organic or inorganic EL display device, and a display on a computer externally connected to the device.
　このように、本実施の形態に係る無線装置１０によれば、例えば、恒常的に受信信号入力レベルが上がったままの状態で混信する他システムからの干渉波信号や妨害波信号等が存在する場合でも、真の受信信号入力レベルに基いて最適なＡＧＣ利得を設定ができる。 Thus, according to radio apparatus 10 according to the present embodiment, for example, there are interference wave signals, jamming wave signals, and the like from other systems that interfere with reception signal input level constantly rising. Even in this case, the optimum AGC gain can be set based on the true received signal input level.
　なお、干渉波信号や妨害波信号がＡ／Ｄ変換器１６後に存在する場合、Ａ／Ｄ変換器１６をそれら混信レベル全体で飽和させない様に可変利得部１５において利得設定が行われ、若干の帯域内干渉劣化を許容しながら復調が行われる。一方、干渉波信号や妨害波信号が少ないもしくは無い場合、真の受信信号を用いて可変利得部１５において利得制御が行われ、Ａ／Ｄ変換器１６後のレベル収束を最適レベルに設定すべくＡＧＣ制御が行われる。この為、最高のＣ／Ｎ状態で受信信号をＡ／Ｄ変換器１６以降に導く事ができる。すなわち、自動利得制御における誤差を抑制し高精度に通信を行うことができる。 When an interference wave signal or an interference wave signal exists after the A / D converter 16, the gain setting is performed in the variable gain unit 15 so as not to saturate the A / D converter 16 over the entire interference level. Demodulation is performed while allowing degradation of in-band interference. On the other hand, when there are few or no interference wave signals or interference wave signals, gain control is performed in the variable gain unit 15 using the true received signal, and the level convergence after the A / D converter 16 should be set to the optimum level. AGC control is performed. For this reason, the received signal can be guided to the A / D converter 16 and later in the highest C / N state. That is, it is possible to perform communication with high accuracy while suppressing errors in automatic gain control.
　なお、本発明は上記実施の形態に限られたものではなく、趣旨を逸脱しない範囲で適宜変更することが可能である。 Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
　また、本発明は、上記増幅器１２、混合器１３、局部発振器１４、可変利得部１５、Ａ／Ｄ変換器１６、ローパスフィルタ１７、ＧＩ除去部１８、ＦＦＴ部１９、復調器２０、自己相関器２１、判定器２２、ＣＩＲ推定器２３、ＲＳＳＩ部２４、スイッチ部２５、ＲＳＳＩ補正器２６、ＡＧＣ制御器２７などが実行する処理を、ＣＰＵにコンピュータプログラムを実行させることにより実現することも可能である。 The present invention also includes the amplifier 12, the mixer 13, the local oscillator 14, the variable gain unit 15, the A / D converter 16, the low-pass filter 17, the GI removing unit 18, the FFT unit 19, the demodulator 20, and the autocorrelator. 21, the determination unit 22, the CIR estimator 23, the RSSI unit 24, the switch unit 25, the RSSI corrector 26, the AGC controller 27, and the like can be realized by causing the CPU to execute a computer program. is there.
　プログラムは、様々なタイプの非一時的なコンピュータ可読媒体（non-transitory computer readable medium）を用いて格納され、コンピュータに供給することができる。非一時的なコンピュータ可読媒体は、様々なタイプの実体のある記録媒体（tangible storage medium）を含む。非一時的なコンピュータ可読媒体の例は、磁気記録媒体（例えばフレキシブルディスク、磁気テープ、ハードディスクドライブ）、光磁気記録媒体（例えば光磁気ディスク）、ＣＤ－ＲＯＭ（Read Only Memory）、ＣＤ－Ｒ、ＣＤ－Ｒ／Ｗ、半導体メモリ（例えば、マスクＲＯＭ、ＰＲＯＭ（Programmable ROM）、ＥＰＲＯＭ（Erasable PROM）、フラッシュＲＯＭ、ＲＡＭ（random access memory））を含む。 The program can be stored and supplied to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (random access memory)) are included.
　また、プログラムは、様々なタイプの一時的なコンピュータ可読媒体（transitory computer readable medium）によってコンピュータに供給されてもよい。一時的なコンピュータ可読媒体の例は、電気信号、光信号、及び電磁波を含む。一時的なコンピュータ可読媒体は、電線及び光ファイバ等の有線通信路、又は無線通信路を介して、プログラムをコンピュータに供給できる。 Also, the program may be supplied to the computer by various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
　上記実施の形態の一部又は全部は、以下の付記のようにも記載されうるが、以下には限られない。 Some or all of the above embodiments may be described as in the following supplementary notes, but are not limited thereto.
（付記１）
　直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置であって、
　前記受信信号の自己相関値のピーク値を算出する自己相関手段と、
　前記自己相関手段により算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する判定手段と、
　前記受信信号の受信強度を検出する受信強度検出手段と、
　前記自己相関手段により算出された前記自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する推定手段と、
　前記判定手段により前記自己相関値のピーク値が判定閾値以上であると判定されたときに前記受信強度検出手段により検出された受信信号の受信強度と、前記推定手段により推定された前記ＣＩＲ推定値に基いて前記受信信号の入力レベルを算出する補正手段と、その補正入力レベルをユーザーに表示する表示手段と、
　前記補正手段により算出された受信信号の入力レベルに基いて前記自動利得制御を行う自動利得制御手段を備えることを特徴とする無線装置。
（付記２）
　（付記１）記載の無線装置であって、
　前記自己相関手段は、前記受信信号において、複数のシンボル内におけるガードインターバルのコピーの周期性を用いて前記自己相関値のピーク値を算出する、ことを特徴とする無線装置。
（付記３）
　（付記１）又は（付記２）記載の無線装置であって、
　前記自己相関手段は、
　デジタル化された前記受信信号を遅延させ遅延波信号として生成する遅延器と、
　前記遅延器からの遅延波信号と前記デジタル化された受信信号である主波信号との自己相関を行うことで、前記自己相関値のピーク値を算出する自己相関演算器と、
　を有することを特徴とする無線装置。
（付記４）
　（付記１）乃至（付記３）のうちいずれか記載の無線装置であって、
　前記ＣＩＲ特性情報は、前記受信信号の自己相関値のピーク値の強度が増加するに従って、希望受信信号（Carrier）に比して干渉波（Interferer）のD/U比が確保され、ＣＩＲ値が増加する関係を示す情報であることを特徴とする無線装置。
（付記５）
　（付記１）乃至（付記４）のうちいずれか記載の無線装置であって、
　前記判定手段により前記自己相関値のピーク値が判定閾値以上であると判定されたとき、前記受信強度検出手段からの受信信号の受信強度を前記補正手段に出力するオン状態と、前記判定手段により前記自己相関値のピーク値が判定閾値より小さいと判定されたとき、前記受信強度検出手段からの受信信号の受信強度を前記補正手段に出力しないオフ状態と、に切替るスイッチ手段を更に備えることを特徴とする無線装置。
（付記６）
　（付記１）乃至（付記５）のうちいずれか記載の無線装置であって、
　前記受信信号を受信するアンテナ手段と、
　前記アンテナ手段により受信された受信信号を増幅する増幅手段と、
　前記増幅手段により増幅された受信信号と所定の基準信号と混合する混合手段と、
　前記自動利得制御手段からの制御信号に応じてゲインを可変させ、前記混合手段により混合された信号を可変させる可変利得手段と、
　前記可変利得手段により可変されたアナログ信号をデジタル信号に変換するＡ／Ｄ変換手段を更に備え、
　前記自己相関手段は、前記Ａ／Ｄ変換手段からのデジタル信号に対する自己相関値のピーク値を算出することを特徴とする無線装置。
（付記７）
　（付記１）乃至（付記６）のうちいずれか記載の無線装置であって、
　前記補正手段は、下記式を用いて前記受信信号の入力レベルを算出することを特徴とする無線装置。
　　　前記受信信号の入力レベル
　　　＝ＲＳＳＩ－１０Ｌｏｇ（１＋１０（－ＣＩＲ［ｄＢ］／１０））
　但し、前記ＲＳＳＩは前記受信強度検出手段により検出された受信信号の受信強度であり、前記ＣＩＲは前記推定手段により推定されたＣＩＲ推定値である。
（付記８）
　直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置の通信方法であって、
　前記受信信号の自己相関値のピーク値を算出するステップと、
　前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定するステップと、
　前記受信信号の受信強度を検出するステップと、
　前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定するステップと、
　前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出するステップと、その入力レベルをユーザーに表示するステップと、
　前記算出された受信信号の入力レベルに基いて前記自動利得制御を行うステップを含むことを特徴とする無線装置の通信方法。
（付記９）
　直交周波数分割多重信号を受信し、該受信信号に対して自動利得制御を行う無線装置の通信プログラムであって、
　前記受信信号の自己相関値のピーク値を算出する処理と、
　前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する処理と、
　前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する処理と、
　前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出する処理と、その入力レベルをユーザーに表示する処理と、
　前記算出された受信信号の入力レベルに基いて前記自動利得制御を行う処理をコンピュータに実行させることを特徴とする無線装置の通信プログラム。 (Appendix 1)
A radio apparatus that receives an orthogonal frequency division multiplexed signal and performs automatic gain control on the received signal,
Autocorrelation means for calculating a peak value of the autocorrelation value of the received signal;
Determination means for determining whether or not the peak value of the autocorrelation value calculated by the autocorrelation means is greater than or equal to a determination threshold;
Reception intensity detection means for detecting the reception intensity of the received signal;
Estimating means for estimating a CIR estimated value indicating a ratio of signal power to interference power based on a peak value of the autocorrelation value calculated by the autocorrelation means and preset CIR characteristic information;
The reception intensity of the received signal detected by the reception intensity detection means when the determination means determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold, and the CIR estimation value estimated by the estimation means Correction means for calculating the input level of the received signal based on the display, display means for displaying the correction input level to the user,
A radio apparatus comprising: automatic gain control means for performing the automatic gain control based on an input level of a received signal calculated by the correction means.
(Appendix 2)
(Appendix 1)
The radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of the autocorrelation value in the received signal using a periodicity of a guard interval copy in a plurality of symbols.
(Appendix 3)
A wireless device according to (Appendix 1) or (Appendix 2),
The autocorrelation means includes
A delay unit that delays the digitized received signal to generate a delayed wave signal;
An autocorrelation calculator that calculates a peak value of the autocorrelation value by performing autocorrelation between the delayed wave signal from the delayer and the main wave signal that is the digitized reception signal;
A wireless device comprising:
(Appendix 4)
A wireless device according to any one of (Appendix 1) to (Appendix 3),
In the CIR characteristic information, as the intensity of the peak value of the autocorrelation value of the received signal increases, the D / U ratio of the interference wave (Interferer) is ensured as compared with the desired received signal (Carrier), and the CIR value is A radio apparatus characterized by being information indicating an increasing relationship.
(Appendix 5)
A wireless device according to any one of (Appendix 1) to (Appendix 4),
When the determination means determines that the peak value of the autocorrelation value is greater than or equal to a determination threshold, the ON state outputs the reception strength of the received signal from the reception strength detection means to the correction means, and the determination means When it is determined that the peak value of the autocorrelation value is smaller than a determination threshold value, switch means for switching to an off state in which the reception intensity of the received signal from the reception intensity detection means is not output to the correction means is further provided. A wireless device characterized by the above.
(Appendix 6)
A wireless device according to any one of (Appendix 1) to (Appendix 5),
Antenna means for receiving the received signal;
Amplifying means for amplifying the received signal received by the antenna means;
Mixing means for mixing the received signal amplified by the amplifying means with a predetermined reference signal;
Variable gain means for varying the gain according to a control signal from the automatic gain control means, and varying the signal mixed by the mixing means;
A / D conversion means for converting the analog signal variable by the variable gain means into a digital signal,
The radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of an autocorrelation value for the digital signal from the A / D conversion means.
(Appendix 7)
A wireless device according to any one of (Appendix 1) to (Appendix 6),
The wireless device characterized in that the correction means calculates an input level of the reception signal using the following equation.
Input level of the received signal = RSSI-10Log (1 + 10 (-CIR [dB] / 10) )
However, the RSSI is the received intensity of the received signal detected by the received intensity detecting means, and the CIR is the CIR estimated value estimated by the estimating means.
(Appendix 8)
A wireless device communication method for receiving an orthogonal frequency division multiplex signal and performing automatic gain control on the received signal,
Calculating a peak value of an autocorrelation value of the received signal;
Determining whether a peak value of the calculated autocorrelation value is equal to or greater than a determination threshold;
Detecting the received intensity of the received signal;
Estimating a CIR estimated value indicating a ratio of signal power to interference power based on the calculated peak value of the autocorrelation value and preset CIR characteristic information;
Calculating the reception level of the received signal detected when it is determined that the peak value of the autocorrelation value is greater than or equal to a determination threshold, and the input level of the received signal based on the estimated CIR estimated value; , Displaying the input level to the user,
A wireless device communication method comprising the step of performing the automatic gain control based on the calculated input level of the received signal.
(Appendix 9)
A communication program for a wireless device that receives an orthogonal frequency division multiplex signal and performs automatic gain control on the received signal,
Processing for calculating a peak value of the autocorrelation value of the received signal;
A process for determining whether or not a peak value of the calculated autocorrelation value is equal to or greater than a determination threshold;
A process of estimating a peak value of the calculated autocorrelation value and a CIR estimation value indicating a ratio of signal power to interference power based on preset CIR characteristic information;
A process of calculating a reception intensity of a received signal detected when it is determined that a peak value of the autocorrelation value is equal to or greater than a determination threshold, and an input level of the received signal based on the estimated CIR estimated value; , Displaying that input level to the user,
A wireless device communication program causing a computer to execute a process of performing the automatic gain control based on the calculated input level of the received signal.
　この出願は、２０１２年７月３１日に出願された日本出願特願２０１２－１６９６４６を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2012-169646 filed on July 31, 2012, the entire disclosure of which is incorporated herein.
　　１、１０　　無線装置
　　２　　自己相関手段
　　３　　判定手段
　　４　　受信強度検出手段
　　５　　推定手段
　　６　　補正手段
　　７　　自動利得制御手段
　　１１　　アンテナ
　　１２　　増幅器
　　１３　　混合器
　　１４　　局部発振器
　　１５　　可変利得部
　　１６　　Ａ／Ｄ変換器
　　１７　　ローパスフィルタ
　　１８　　ＧＩ除去部
　　１９　　ＦＦＴ部
　　２０　　復調器
　　２１　　自己相関器
　　２２　　判定器
　　２３　　ＣＩＲ推定器
　　２４　　ＲＳＳＩ部
　　２５　　スイッチ部
　　２６　　ＲＳＳＩ補正器
　　２７　　ＡＧＣ制御器
　　２８　　表示器
　　２１１　　遅延器
　　２１２　　自己相関演算器 DESCRIPTION OF SYMBOLS 1, 10 Wireless apparatus 2 Autocorrelation means 3 Judgment means 4 Reception intensity detection means 5 Estimation means 6 Correction means 7 Automatic gain control means 11 Antenna 12 Amplifier 13 Mixer 14 Local oscillator 15 Variable gain part 16 A / D converter 17 Low pass Filter 18 GI removal unit 19 FFT unit 20 Demodulator 21 Autocorrelator 22 Judgment unit 23 CIR estimator 24 RSSI unit 25 Switch unit 26 RSSI corrector 27 AGC controller 28 Display 211 Delay unit 212 Autocorrelation calculator

Claims (9)

  1. 　直交周波数分割多重信号である受信信号の自己相関値のピーク値を算出する自己相関手段と、
    　前記自己相関手段により算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する判定手段と、
    　前記受信信号の受信強度を検出する受信強度検出手段と、
    　前記自己相関手段により算出された前記自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する推定手段と、
    　前記判定手段により前記自己相関値のピーク値が判定閾値以上であると判定されたときに前記受信強度検出手段により検出された受信信号の受信強度と、前記推定手段により推定された前記ＣＩＲ推定値に基いて前記受信信号の入力レベルを算出する補正手段と、同入力レベルをユーザーに表示する表示手段と、
    　前記補正手段により算出された受信信号の入力レベルに基いて前記自動利得制御を行う自動利得制御手段を備えることを特徴とする無線装置。     Autocorrelation means for calculating a peak value of an autocorrelation value of a received signal which is an orthogonal frequency division multiplexing signal;
    Determination means for determining whether or not the peak value of the autocorrelation value calculated by the autocorrelation means is greater than or equal to a determination threshold;
    Reception intensity detection means for detecting the reception intensity of the received signal;
    Estimating means for estimating a CIR estimated value indicating a ratio of signal power to interference power based on a peak value of the autocorrelation value calculated by the autocorrelation means and preset CIR characteristic information;
    The reception intensity of the received signal detected by the reception intensity detection means when the determination means determines that the peak value of the autocorrelation value is greater than or equal to the determination threshold, and the CIR estimation value estimated by the estimation means Correction means for calculating the input level of the received signal based on the display, display means for displaying the input level to the user,
    A radio apparatus comprising: automatic gain control means for performing the automatic gain control based on an input level of a received signal calculated by the correction means.
  2. 　請求項１記載の無線装置であって、
    　前記自己相関手段は、前記受信信号において、複数のシンボル内におけるガードインターバルのコピーの周期性を用いて前記自己相関値のピーク値を算出することを特徴とする無線装置。     The wireless device according to claim 1,
    The radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of the autocorrelation value using a periodicity of a guard interval copy in a plurality of symbols in the received signal.
  3. 　請求項１又は２記載の無線装置であって、
    　前記自己相関手段は、
    　デジタル化された前記受信信号を遅延させ遅延波信号として生成する遅延器と、
    　前記遅延器からの遅延波信号と前記デジタル化された受信信号である主波信号との自己相関を行うことで、前記自己相関値のピーク値を算出する自己相関演算器を有することを特徴とする無線装置。     The wireless device according to claim 1 or 2,
    The autocorrelation means includes
    A delay unit that delays the digitized received signal to generate a delayed wave signal;
    It has an autocorrelation calculator that calculates a peak value of the autocorrelation value by performing autocorrelation between the delayed wave signal from the delay device and the main wave signal that is the digitized reception signal, Wireless device to do.
  4. 　請求項１乃至３のうちいずれか１項記載の無線装置であって、
    　前記ＣＩＲ特性情報は、前記受信信号の自己相関値のピーク値の強度が増加するに従って、希望受信信号（Carrier）に比して干渉波（Interferer）のD/U比が確保され、ＣＩＲ値が増加する関係を示す情報であることを特徴とする無線装置。     The wireless device according to any one of claims 1 to 3,
    In the CIR characteristic information, as the intensity of the peak value of the autocorrelation value of the received signal increases, the D / U ratio of the interference wave (Interferer) is ensured as compared with the desired received signal (Carrier), and the CIR value is A radio apparatus characterized by being information indicating an increasing relationship.
  5. 　請求項１乃至４のうちいずれか１項記載の無線装置であって、
    　前記判定手段により前記自己相関値のピーク値が判定閾値以上であると判定されたとき、前記受信強度検出手段からの受信信号の受信強度を前記補正手段に出力するオン状態と、前記判定手段により前記自己相関値のピーク値が判定閾値より小さいと判定されたとき、前記受信強度検出手段からの受信信号の受信強度を前記補正手段に出力しないオフ状態に切替るスイッチ手段を更に備えることを特徴とする無線装置。     A wireless device according to any one of claims 1 to 4,
    When the determination means determines that the peak value of the autocorrelation value is greater than or equal to a determination threshold, the ON state outputs the reception strength of the received signal from the reception strength detection means to the correction means, and the determination means When it is determined that the peak value of the autocorrelation value is smaller than a determination threshold value, the apparatus further comprises switch means for switching to an off state in which the reception intensity of the reception signal from the reception intensity detection means is not output to the correction means. A wireless device.
  6. 　請求項１乃至５のうちいずれか１項記載の無線装置であって、
    　前記受信信号を受信するアンテナ手段と、
    　前記アンテナ手段により受信された受信信号を増幅する増幅手段と、
    　前記増幅手段により増幅された受信信号と所定の基準信号と混合する混合手段と、
    　前記自動利得制御手段からの制御信号に応じてゲインを可変させ、前記混合手段により混合された信号を可変させる可変利得手段と、
    　前記可変利得手段により可変されたアナログ信号をデジタル信号に変換するＡ／Ｄ変換手段を更に備え、
    　前記自己相関手段は、前記Ａ／Ｄ変換手段からのデジタル信号に対する自己相関値のピーク値を算出することを特徴とする無線装置。     A wireless device according to any one of claims 1 to 5,
    Antenna means for receiving the received signal;
    Amplifying means for amplifying the received signal received by the antenna means;
    Mixing means for mixing the received signal amplified by the amplifying means with a predetermined reference signal;
    Variable gain means for varying the gain according to a control signal from the automatic gain control means, and varying the signal mixed by the mixing means;
    A / D conversion means for converting the analog signal variable by the variable gain means into a digital signal,
    The radio apparatus according to claim 1, wherein the autocorrelation means calculates a peak value of an autocorrelation value for the digital signal from the A / D conversion means.
  7. 　請求項１乃至６のうちいずれか１項記載の無線装置であって、
    　前記補正手段は、下記式を用いて前記受信信号の入力レベルを算出することを特徴とする無線装置。
    　　　前記受信信号の入力レベル
    　　　＝ＲＳＳＩ－１０Ｌｏｇ（１＋１０（－ＣＩＲ［ｄＢ］／１０））
    　但し、前記ＲＳＳＩは前記受信強度検出手段により検出された受信信号の受信強度であり、前記ＣＩＲは前記推定手段により推定されたＣＩＲ推定値である。     The wireless device according to any one of claims 1 to 6,
    The wireless device characterized in that the correction means calculates an input level of the reception signal using the following equation.
    Input level of the received signal = RSSI-10Log (1 + 10 (-CIR [dB] / 10) )
    However, the RSSI is the received intensity of the received signal detected by the received intensity detecting means, and the CIR is the CIR estimated value estimated by the estimating means.
  8. 　直交周波数分割多重信号である受信信号の自己相関値のピーク値を算出し、
    　前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定し、
    　前記受信信号の受信強度を検出し、
    　前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定し、
    　前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出するステップと、その入力レベルをユーザーに表示し、
    　前記算出された受信信号の入力レベルに基いて前記自動利得制御を行うことを特徴とする無線装置の通信方法。     Calculate the peak value of the autocorrelation value of the received signal that is an orthogonal frequency division multiplex signal,
    Determining whether the calculated peak value of the autocorrelation value is equal to or greater than a determination threshold;
    Detecting the received intensity of the received signal;
    Estimating a CIR estimated value indicating a ratio of signal power to interference power based on the calculated peak value of the autocorrelation value and preset CIR characteristic information;
    Calculating the reception level of the received signal detected when it is determined that the peak value of the autocorrelation value is greater than or equal to a determination threshold, and the input level of the received signal based on the estimated CIR estimated value; , Display that input level to the user,
    A communication method for a wireless device, wherein the automatic gain control is performed based on the calculated input level of the received signal.
  9. 　直交周波数分割多重信号である受信信号の自己相関値のピーク値を算出する処理と、
    　前記算出された自己相関値のピーク値が判定閾値以上であるか否かを判定する処理と、
    　前記算出された自己相関値のピーク値と、予め設定されたＣＩＲ特性情報に基いて干渉電力に対する信号電力の比を示すＣＩＲ推定値を推定する処理と、
    　前記自己相関値のピーク値が判定閾値以上であると判定されたときに検出された受信信号の受信強度と、前記推定されたＣＩＲ推定値に基いて前記受信信号の入力レベルを算出する処理と、その入力レベルをユーザーに表示する処理と、
    　前記算出された受信信号の入力レベルに基いて前記自動利得制御を行う処理をコンピュータに実行させる無線装置の通信プログラムを格納した非一時的なコンピュータ可読媒体。     Processing for calculating the peak value of the autocorrelation value of the received signal which is an orthogonal frequency division multiplex signal;
    A process for determining whether or not a peak value of the calculated autocorrelation value is equal to or greater than a determination threshold;
    A process of estimating a peak value of the calculated autocorrelation value and a CIR estimation value indicating a ratio of signal power to interference power based on preset CIR characteristic information;
    A process of calculating a reception intensity of a received signal detected when it is determined that a peak value of the autocorrelation value is equal to or greater than a determination threshold, and an input level of the received signal based on the estimated CIR estimated value; , Displaying that input level to the user,
    A non-transitory computer-readable medium storing a communication program for a wireless device that causes a computer to execute processing for performing the automatic gain control based on the calculated input level of the received signal.
PCT/JP2013/002818 2012-07-31 2013-04-25 Radio apparatus, communication method thereof and computer-readable medium WO2014020802A1 (en)

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