JPS6361517A - Radio communication equipment - Google Patents
Radio communication equipmentInfo
- Publication number
- JPS6361517A JPS6361517A JP61205494A JP20549486A JPS6361517A JP S6361517 A JPS6361517 A JP S6361517A JP 61205494 A JP61205494 A JP 61205494A JP 20549486 A JP20549486 A JP 20549486A JP S6361517 A JPS6361517 A JP S6361517A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- tone
- station
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000005236 sound signal Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract description 10
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- Y02B60/50—
Landscapes
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は無線通信装置に係り、相手局と双方向の通信を
行なう無線通信装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wireless communication device, and more particularly, to a wireless communication device that performs two-way communication with a partner station.
従来の技術
従来より第６図に示す如ぎコードレス電話システムがあ
る。このコードレス電話システムは固定局１０と移動局
１１との間で無線通信を行なう。2. Description of the Related Art Conventionally, there has been a cordless telephone system as shown in FIG. This cordless telephone system performs wireless communication between a fixed station 10 and a mobile station 11.
従って固定局１０．移動局１１夫々は第７図に示す如き
送信部１２と受信部１３とを有している。Therefore fixed station 10. Each mobile station 11 has a transmitter 12 and a receiver 13 as shown in FIG.
送信部１２の増幅器１４より出力される被変調信号の送
信出力レベルＰ０は一定とされている。The transmission output level P0 of the modulated signal output from the amplifier 14 of the transmitter 12 is constant.
受信部１３のアンテナで受信された電波は利得可変同調
増幅器１５で同調され、復調器１６で音声信号に復調さ
れ、増幅器１７を経てスピーカ１８より発音される。ま
た、利得可変同調増幅器１５の同調出力はレベル検出器
１９に供給され、レベル検出器１９の出力制御信号Ｃが
利得可変同調回路１５に供給されてその利得を可変する
。これによって、受信部１３のアンテナの受信レベルＡ
が変化しても上記同調出力レベルＢが一定となるよう自
動利得調整が行なわれる。The radio waves received by the antenna of the receiving section 13 are tuned by the variable gain tuning amplifier 15, demodulated into an audio signal by the demodulator 16, and output from the speaker 18 via the amplifier 17. Further, the tuned output of the variable gain tuning amplifier 15 is supplied to a level detector 19, and the output control signal C of the level detector 19 is supplied to the variable gain tuning circuit 15 to vary its gain. As a result, the receiving level A of the antenna of the receiving section 13 is
Automatic gain adjustment is performed so that the tuning output level B remains constant even if the output voltage changes.
ところで、固定局１０と移動局１１夫々の出力周波数が
異なる場合には、消費電力の低減、混信の防止等を目的
としていずれか一方の局の送信出力レベルを可変する第
８図に示す如きものがある。By the way, when the output frequencies of the fixed station 10 and the mobile station 11 are different, there is a system as shown in FIG. 8 in which the transmission output level of one of the stations is varied for the purpose of reducing power consumption, preventing interference, etc. There is.
同図中、第４図と同一部分には同一符号を付し、その説
明を省略する。In this figure, the same parts as in FIG. 4 are given the same reference numerals, and their explanations will be omitted.
第８図において、固定局１２の増幅器２１は端子２２よ
り入来するキャリア周波数ｆ＋の被変調信号を増幅して
アンテナより出力する。また、固定局１２のアンテナで
受信された電波は同調周波数ｆ２の同調増幅器２３に供
給され、その同調出力が可変利得増幅器２４及びレベル
検出器２５に供給される。可変利得増幅器２４はレベル
検出器２５の出力制御信号に応じて同調出力を可変増幅
し、その出力は復調器２６で復調され増幅器２７を経て
スピーカ２８より発音される。また、レベル検出器２５
の出力制御信号は増幅器２１に供給され、増幅器２１は
この制御信号に応じて被変調信号の増幅度を可変し、ア
ンテナへの出力電力を増減する。In FIG. 8, an amplifier 21 of a fixed station 12 amplifies a modulated signal of a carrier frequency f+ coming from a terminal 22 and outputs the amplified signal from an antenna. Further, the radio wave received by the antenna of the fixed station 12 is supplied to a tuning amplifier 23 having a tuning frequency f2, and its tuning output is supplied to a variable gain amplifier 24 and a level detector 25. The variable gain amplifier 24 variably amplifies the tuned output in accordance with the output control signal of the level detector 25, and the output thereof is demodulated by the demodulator 26, passes through the amplifier 27, and is output from the speaker 28. In addition, the level detector 25
The output control signal is supplied to the amplifier 21, and the amplifier 21 varies the degree of amplification of the modulated signal according to this control signal, and increases or decreases the output power to the antenna.
なお、移動８１３の増幅器２９は端子３０より入来する
キャリア周波数ｆ２の被変調信号を一定の増幅度で増幅
してアンテナより出力する。Note that the amplifier 29 of the movable member 813 amplifies the modulated signal of the carrier frequency f2 coming from the terminal 30 at a constant amplification degree, and outputs the amplified signal from the antenna.
上記の固定局１２は移動局１３よりのキャリア周波数ｆ
２の信号の受信レベルが大なる程、キャリア周波数ｆ１
の信号の送信出力レベルが小となるようキャリア周波数
ｆ１の信号の出力レベルを可変している。The above fixed station 12 has a carrier frequency f from the mobile station 13.
The higher the reception level of the signal of 2, the higher the carrier frequency f1.
The output level of the signal with carrier frequency f1 is varied so that the transmission output level of the signal with carrier frequency f1 becomes small.
発明が解決しようとする問題点
上記第８図のシステムでは固定局１２の送信出力レベル
を可変することはできるが移動局１３の送信出力レベル
は一定であり、移動局１３の消費電力を低減できず、ま
た混信の防止も図れないという問題点があった。また、
第５図示の移動局１３を固定局１２と同一回路構成とし
て両局の送信出力レベルを制御しようとしても、無限ル
ープが形成されて適正な制御を行なうことはできない。Problems to be Solved by the Invention In the system shown in FIG. 8 above, the transmission output level of the fixed station 12 can be varied, but the transmission output level of the mobile station 13 is constant, and the power consumption of the mobile station 13 cannot be reduced. Furthermore, there was a problem in that it was not possible to prevent interference. Also,
Even if the mobile station 13 shown in FIG. 5 has the same circuit configuration as the fixed station 12 and attempts are made to control the transmission output levels of both stations, an infinite loop will be formed and proper control will not be possible.
そこで、本発明はトーン信号発生手段、混合手段、レベ
ル可変手段を設けることにより、上記の問題点を解決し
た無線通信装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless communication device that solves the above problems by providing tone signal generating means, mixing means, and level variable means.
問題点を解決するための手段
本発明において、トーン信号発生手段は、相手局からの
電波の受信レベルを判別して音声信号周波数帯域より低
い周波数で受信レベルを表わすトーン信号を発生する。Means for Solving the Problems In the present invention, the tone signal generating means determines the reception level of radio waves from the other station and generates a tone signal representing the reception level at a frequency lower than the voice signal frequency band.
混合手段は、相手局へ送信する音声信号とトーン信号と
を混合して通信信号とする。The mixing means mixes the voice signal and tone signal to be transmitted to the other station to form a communication signal.
レベル可変手段は、受信された相手局からの通信信号中
のトーン信号に対応して、混合手段の出力通信信号を変
調した被変調信号の送信出力レベルを可変する。The level variable means varies the transmission output level of the modulated signal obtained by modulating the output communication signal of the mixing means in response to the tone signal in the received communication signal from the partner station.
作用
本発明においては、相手局からの通信信号に、相手局に
おける受信レベルを表わすトーン信号が混合されている
ため、相手局が受信可能な範囲で最小となるよう送信出
力レベルを可変できる。In the present invention, since the communication signal from the other station is mixed with a tone signal representing the reception level at the other station, the transmission output level can be varied so as to be the minimum within the receivable range of the other station.
実施例
第１図は本発明装置の一実施例のブロック系統図を示す
。同図中、４０は送信部、４１は受信部である。Embodiment FIG. 1 shows a block system diagram of an embodiment of the apparatus of the present invention. In the figure, 40 is a transmitter, and 41 is a receiver.
マイクロホン４２で得られた第２図＜Ａ）に示す如き周
波数スペクトラムの音声信号は帯域フィルタ４３で例え
ば周波数４００８Ｚ 〜３．５ ｋＨｚのみを通過せし
められて第２図（Ｂ）に示す如き信号とされ増幅器４４
を介して混合器４５に供給される。混合器４５には後述
するトーン発生器４６より例えば周波数５０Ｈｚのトー
ン信号が供給されており、上記音声信号にトーン信号が
混合されて第２図（Ｃ）に示す如き通信信号で得られ、
この信号は変調器４７でＡＭ又はＦＭ等の変調を行なわ
れて電力可変増幅器４８に供給され、ここで増幅された
後アンテナ４９より電波として送信される。An audio signal having a frequency spectrum as shown in FIG. 2(A) obtained by the microphone 42 is passed through a bandpass filter 43, for example, allowing only frequencies of 4008Z to 3.5 kHz to pass, resulting in a signal as shown in FIG. 2(B). amplifier 44
is supplied to the mixer 45 via. A tone signal with a frequency of, for example, 50 Hz is supplied to the mixer 45 from a tone generator 46, which will be described later, and the tone signal is mixed with the audio signal to obtain a communication signal as shown in FIG. 2(C).
This signal is subjected to AM or FM modulation by a modulator 47 and supplied to a variable power amplifier 48, where it is amplified and then transmitted as a radio wave from an antenna 49.
また、アンテナ４９で受信された相手局よりの電波はＲ
Ｆ増幅器５１で増幅された後、混合器５２において局部
発振器５３よりの局部発掘信号と混合されて中間周波信
号とされる。この中間周波信号はＩＦ増幅器５４で増幅
された後、復調器５５で復調される。復調器５５の出力
信号は２分岐され、その一方が帯域フィルタ５６に供給
され、ここでトーン信号が除去れて音声信号のみが取り
出される。この音声信号は増幅器５７を介してスピーカ
５８に供給され発音される。Furthermore, the radio waves received by the antenna 49 from the other station are R
After being amplified by an F amplifier 51, it is mixed with a local excavation signal from a local oscillator 53 in a mixer 52 to form an intermediate frequency signal. This intermediate frequency signal is amplified by an IF amplifier 54 and then demodulated by a demodulator 55. The output signal of the demodulator 55 is branched into two, one of which is supplied to a bandpass filter 56, where the tone signal is removed and only the audio signal is extracted. This audio signal is supplied to a speaker 58 via an amplifier 57 and produced.
更に復調器５５の出力信号は送信部４０内の低域フィル
タ６１に供給され、ここで音声信号が除去されてトーン
信号が取り出されてトーン判定器６２に供給される。ト
ーン判定器６２は相手局における受信レベルに応じたト
ーン信号のレベルを検出して、そのレベルに応じた制御
信号を生成し電力可変増幅器４８に供給する。これによ
って電力可変増幅器４８はトーン判定器６２に供給され
るトーン信号のレベルが大なる程、増幅度が小となるよ
う可変する。Further, the output signal of the demodulator 55 is supplied to a low-pass filter 61 in the transmitting section 40, where the voice signal is removed and a tone signal is extracted and supplied to a tone determiner 62. Tone determiner 62 detects the level of the tone signal corresponding to the reception level at the other station, generates a control signal according to the detected level, and supplies it to variable power amplifier 48 . As a result, the power variable amplifier 48 varies its amplification degree so that the higher the level of the tone signal supplied to the tone determiner 62, the lower the amplification degree.
上記ＲＦ増幅器５１の出力ＲＦ倍信号混合器５２の他に
送信部４０内のレベル検出器６０に供給され、ここで受
信レベルが検出され、その受信レベルに比例したレベル
の検出信号が生成される。The output of the RF amplifier 51 is supplied to the level detector 60 in the transmitter 40 in addition to the RF multiplier signal mixer 52, where the received level is detected and a detection signal with a level proportional to the received level is generated. .
検出信号はトーン発生器４６に供給され、トーン発生器
はトーン信号の波高値を検出信号のレベルに比例した波
高値のトーン信号を生成して混合器４５に供給する。こ
のトーン信号は受信部４１における受信レベルを表わす
ものである。The detection signal is supplied to a tone generator 46, which generates a tone signal having a peak value proportional to the level of the detection signal, and supplies the generated tone signal to the mixer 45. This tone signal represents the reception level at the receiving section 41.
この結果、アンテナ４９より送信する送信出力レベルは
相手局の受信可能な範囲内で最小とされる。As a result, the transmission output level transmitted from the antenna 49 is minimized within the receivable range of the partner station.
また、相手局も第１図と同一構成であるために、相手局
の送信出力レベルは受信部４１の受信可変な範囲内で最
小とされ、これによって第２図（Ｃ）の１・−ン信号の
レベルＲｏは、レベルＲＨ以下でレベルＲｃ、以上の範
囲にある所定レベルとなる。Furthermore, since the partner station also has the same configuration as in FIG. The level Ro of the signal is a predetermined level within a range from below the level RH to above the level Rc.
このようにして第１図示の装置及び相手局夫々の消費電
力を低減することができ、他の無線通信機器との混信を
防止できる。In this way, it is possible to reduce the power consumption of each of the device shown in the first diagram and the partner station, and it is possible to prevent interference with other wireless communication devices.
更にトーン信号を音声信号帯域内で音声信号と周波数分
割多重しているので変調器４７で変調を行なっても送信
電波の占有周波数帯域が広がることがなく、帯域利用率
が良い。Furthermore, since the tone signal is frequency-division multiplexed with the audio signal within the audio signal band, the occupied frequency band of the transmitted radio wave does not widen even when modulated by the modulator 47, resulting in a good band utilization rate.
ところで、トーン発生器４６でトーン信号として第３図
（Ａ）、（Ｂ）に示す如く基準信号とレベル情報信号と
を発生しても良い。第３図（Ａ）において、基準信号は
矢印Ｉで示す如く周波数１０Ｈｚで一定レベルの信号で
ある。またレベル情報信号は矢印■で示す如く周波数５
０Ｈ７で、そのレベルが受信レベルの検出信号のレベル
に比例して変化する。この場合、トーン判定器６２にお
いては基準信号とレベル情報信号とのレベル差を判定し
て、このレベル差に応じた制御信号を生成する。By the way, the tone generator 46 may generate a reference signal and a level information signal as tone signals as shown in FIGS. 3(A) and 3(B). In FIG. 3(A), the reference signal is a signal with a frequency of 10 Hz and a constant level as shown by arrow I. Also, the level information signal has a frequency of 5 as shown by the arrow ■.
At 0H7, the level changes in proportion to the level of the received level detection signal. In this case, the tone determiner 62 determines the level difference between the reference signal and the level information signal, and generates a control signal according to this level difference.
第３図（Ｂ）において、実線■で示す基準信号は周波数
１０Ｈ２で一定レベルの信号である。また、破線■で示
すレベル情報信号も周波数１０Ｈｚで一定レベルである
が、基準信号に対する位相が受信レベルの検出信号のレ
ベルに比例して変化する。この場合、トーン判定器６２
においては基準信号に対するレベル情報信号の位相差を
判定して、この位相差に応じて制御信号を生成する。In FIG. 3(B), the reference signal indicated by the solid line ■ is a signal with a frequency of 10H2 and a constant level. Further, the level information signal indicated by the broken line ■ also has a constant level at a frequency of 10 Hz, but its phase with respect to the reference signal changes in proportion to the level of the reception level detection signal. In this case, the tone determiner 62
In this step, the phase difference between the level information signal and the reference signal is determined, and a control signal is generated in accordance with this phase difference.
上記第３図（Ａ）、（Ｂ）に示す実施例では、ＡＭ変調
波を電波として送信する場合において相手局よりの電波
の受信状態が悪くても、レベル差又は位相差により相手
局の受信レベルを確実に知ることができる。つまり伝送
系の影響を受けにくい。In the embodiment shown in FIGS. 3(A) and 3(B) above, when transmitting an AM modulated wave as a radio wave, even if the reception condition of the radio wave from the other station is poor, the reception at the other station is due to the level difference or phase difference. You can know your level with certainty. In other words, it is less affected by the transmission system.
更に、第１図示の装置で複数の相手局と時分割で通信を
行なう場合には、トーン発生器４６は第４図（Ａ）に示
す如く、矢印ｖ０で示す一定レベルの基準信号と矢印ｖ
１〜ｖ１で示す各相手局に対応した複数のレベル情報信
号とを互いに周波数を異ならしめて発生する。各レベル
情報信号のレベルは各相手局からの受信レベルの検出信
号のレベルに比例して変化する。この場合トーン判定器
６２において基準信号と各レベル情報信号とのレベル差
を判定して相手局に対応した制御信号を生成する。Furthermore, when the device shown in FIG. 1 communicates with a plurality of partner stations in a time-sharing manner, the tone generator 46 generates a constant level reference signal indicated by the arrow v0 and an arrow v as shown in FIG. 4(A).
A plurality of level information signals corresponding to each partner station indicated by 1 to v1 are generated at different frequencies. The level of each level information signal changes in proportion to the level of the reception level detection signal from each partner station. In this case, the tone determiner 62 determines the level difference between the reference signal and each level information signal to generate a control signal corresponding to the partner station.
なお、上記複数のレベル情報信号を基準信号と同一周波
数で１、第４図（Ｂ）に示す如く基準信号に対して９０
度、１８０度、２７０度移相し、各相手局に対応した検
出信号のレベルに比例して各位相におけるレベルを可変
しても良い。この場合、トーン判定器６２においては基
準信号を９０度。Note that the above-mentioned plurality of level information signals are set at the same frequency as the reference signal, and as shown in FIG. 4(B), the frequency is set at 90
The phase may be shifted by 180 degrees or 270 degrees, and the level at each phase may be varied in proportion to the level of the detection signal corresponding to each partner station. In this case, the tone determiner 62 sets the reference signal at 90 degrees.
１８０度、２７０度移相した信号に対する各レベル情報
信号のレベル差を判定して相手局に対応した制御信号を
生成する。第４図（Ｂ）に示す例ではＡ局（９０°）は
適正、８局（１８０”）は弱すぎ、０局（２７０”）は
強すぎの情報が得られる。A control signal corresponding to the partner station is generated by determining the level difference between each level information signal with respect to a signal phase-shifted by 180 degrees and 270 degrees. In the example shown in FIG. 4(B), information is obtained that station A (90°) is appropriate, station 8 (180'') is too weak, and station 0 (270'') is too strong.
また、複数の相手局と周波数分割で通信を行なう場合に
は、第５図に示す回路構成とする。第５図において受信
部７０＋〜７０Ｔｌ夫々は第１図示の受信部４１及びス
ピーカ５８と同一構成である。Further, when communicating with a plurality of partner stations by frequency division, the circuit configuration shown in FIG. 5 is used. In FIG. 5, each of the receiving sections 70+ to 70Tl has the same configuration as the receiving section 41 and speaker 58 shown in the first drawing.
受信部７０１〜７０Ｔ＋夫々のＲＦ増幅器５１出力は変
調部７１＋〜７１１夫々に供給される。変調部７１１〜
７１１夫々は、第１図示のレベル検出器６０及びマイク
ロホン４２〜変調器４７と同一構成であり、トーン信号
及び音声信号で変調された被変調波を可変抵抗７３１〜
７３Ｔｌ夫々に供給する。なお、変調部７０１〜７ｏη
夫々の搬送波周波数はｆ１〜ｆＴＩと全て異ならしめで
ある。The outputs of the RF amplifiers 51 of the receiving sections 701-70T+ are supplied to the modulating sections 71+-711, respectively. Modulation section 711~
Each of 711 has the same configuration as the level detector 60 and microphone 42 to modulator 47 shown in FIG.
73Tl respectively. Note that the modulation units 701 to 7oη
The respective carrier wave frequencies f1 to fTI are all different.
また、受信部７０１〜７０Ｔｌ夫々の復調器５５出力は
制御部７２１〜７２１夫々に供給される。Furthermore, the outputs of the demodulators 55 of the receivers 701-70Tl are supplied to the controllers 721-721, respectively.
制御部７２１〜７２Ｔｌ夫々は第１図示の低域フィルタ
６１及びトーン判定器６２と同一構成であり、制御信号
を生成して可変抵抗７３＋〜７３Ｔｌ夫々に供給する。Each of the control units 721-72Tl has the same configuration as the low-pass filter 61 and tone determiner 62 shown in the first diagram, and generates a control signal and supplies it to each of the variable resistors 73+-73Tl.
可変抵抗７３１へ７３１夫々は上記１ＩＪＩＩＩ信号に
応じた減衰率で被変調波を減衰して混合器７４に供給す
る。混合器７４は供給される被変調波を全て混合し、得
られた混合被変調波は一定増幅度の電力増幅器７５で増
幅されてアンテナ４つより電波として出力される。Each of the variable resistors 731 attenuates the modulated wave at an attenuation rate according to the 1IJIII signal and supplies it to the mixer 74. The mixer 74 mixes all of the supplied modulated waves, and the resulting mixed modulated wave is amplified by a power amplifier 75 with a constant amplification degree and output as radio waves from four antennas.
このようにして複数の相手局に対して異なる送信出力レ
ベルで送信することが可能である。In this way, it is possible to transmit to a plurality of partner stations at different transmission output levels.
発明の効果
上述の如く、本発明になる無線通信装置は、トーン信号
発生手段と混合手段とレベル可変手段とを設けてなるた
め、送信出力レベルを相手局が受信可能な範囲で最小と
なるよう可変でき、消費電力の低減及び混信の防止を行
ない得、送信電波の占有周波数帯域が広がることがなく
帯域利用率が良く、また、トーン信号を基準信号とレベ
ル情報信号とで構成することにより伝送系の影響を受け
にくく、更に複数の相手局毎にレベル情報信号の周波数
又は位相、又は通信信号の被変調信号の周波数を異なら
しめることにより、複数の相手局に対して夫々最適の送
信出力レベルで送信できる等の特長を有している。Effects of the Invention As described above, the wireless communication device according to the present invention is provided with a tone signal generating means, a mixing means, and a level variable means, so that the transmission output level can be minimized within a range that can be received by the other station. It can be varied, reduces power consumption and prevents interference. The occupied frequency band of the transmitted radio wave does not widen, resulting in good band utilization. Also, the tone signal is composed of a reference signal and a level information signal, making it easy to transmit. By making the frequency or phase of the level information signal or the frequency of the modulated signal of the communication signal different for each of multiple partner stations, it is possible to achieve the optimal transmission output level for each of the multiple partner stations. It has features such as being able to send data using
第１図は本発明装置の一実施例のブロック系統図、第２
図は第１図示の装置各部の信号波形図、第３図、第４図
夫々は基準信号とレベル情報信号との関係を説明するた
めの図、第５図は本発明装置の変形例のブロック系統図
、第６図は従来のコードレス電話システムの一例の外観
斜視図、第７図、第８図夫々は第６図示のシステムの８
例のブロック系統図である。
４０・・・送信部、４１・・・受信部、４３．５６・・
・帯域フィルタ、４５．７４・・・混合器、４６・・・
トーン発生器、４７・・・変調器、４８川電力可変増幅
器、５５・・・復調器、６０・・・レベル検出器、６１
・・・低域フィルタ、６２・・・トーン判定器、７３１
〜７３η・・・可変抵抗、７５・・・電力増幅器。
特許出願人 日本ビクター株式会社
第２図
重数（Ｈｘｌ
ｍ液敏（Ｈｚ）
稟３図
第４図
ｚ’／ｕｌｌ−、司」FIG. 1 is a block system diagram of one embodiment of the device of the present invention, and FIG.
The figure is a signal waveform diagram of each part of the device shown in FIG. 1, FIGS. 3 and 4 are diagrams for explaining the relationship between the reference signal and the level information signal, and FIG. 5 is a block diagram of a modification of the device of the present invention. System diagram, FIG. 6 is an external perspective view of an example of a conventional cordless telephone system, and FIG. 7 and FIG.
FIG. 2 is an example block diagram. 40... Transmitting section, 41... Receiving section, 43.56...
・Band filter, 45.74...Mixer, 46...
Tone generator, 47... Modulator, 48 River power variable amplifier, 55... Demodulator, 60... Level detector, 61
...Low pass filter, 62...Tone judger, 731
~73η...variable resistor, 75...power amplifier. Patent applicant Victor Company of Japan Co., Ltd. Figure 2 Weight (Hxl m liquid density (Hz) Figure 3 Figure 4 z'/ull-, Tsukasa)
Claims (5)
において、 該相手局からの電波の受信レベルを判別して音声信号周
波数帯域より低い周波数で該受信レベルを表わすトーン
信号を発生するトーン信号発生手段と、 該相手局へ送信する音声信号と該トーン信号とを混合し
て通信信号とする混合手段と、 受信された相手局からの通信信号中のトーン信号に対応
して、該混合手段の出力通信信号を変調した被変調信号
の送信出力レベルを可変するレベル可変手段とを設けた
ことを特徴とする無線通信装置。(1) In a wireless communication device that performs two-way wireless communication with a partner station, a tone that determines the reception level of radio waves from the partner station and generates a tone signal representing the reception level at a frequency lower than the audio signal frequency band. a signal generating means; a mixing means for mixing an audio signal to be transmitted to the partner station and the tone signal to produce a communication signal; 1. A wireless communication device comprising level variable means for varying the transmission output level of a modulated signal obtained by modulating the output communication signal of the means.
受信レベルに応じた値であることを特徴とする特許請求
の範囲第１項記載の無線通信装置。(2) The wireless communication device according to claim 1, wherein the tone signal has a constant frequency and a level that corresponds to the received level.
らなり、該基準信号に対する該レベル情報信号のレベル
差又は位相差が該受信レベルに応じた値であることを特
徴とする特許請求の範囲１項記載の無線通信装置。(3) The tone signal is composed of a reference signal and a level information signal, and the level difference or phase difference of the level information signal with respect to the reference signal is a value corresponding to the received level. Wireless communication device according to scope 1.
ベル情報信号の周波数又は該基準信号に対する位相を異
ならしめることを特徴とする特許請求の範囲第３項記載
の無線通信装置。(4) The radio communication device according to claim 3, wherein the tone signal generating means makes the frequency of the level information signal or the phase with respect to the reference signal different for each of a plurality of partner stations.
波数が異なることを特徴とする特許請求の範囲第１項記
載の無線通信装置。(5) The radio communication device according to claim 1, wherein the modulated signal has a different frequency corresponding to each of the plurality of partner stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61205494A JPS6361517A (en) | 1986-09-01 | 1986-09-01 | Radio communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61205494A JPS6361517A (en) | 1986-09-01 | 1986-09-01 | Radio communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6361517A true JPS6361517A (en) | 1988-03-17 |
Family
ID=16507786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61205494A Pending JPS6361517A (en) | 1986-09-01 | 1986-09-01 | Radio communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6361517A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309721A (en) * | 1989-05-24 | 1990-12-25 | Nec Corp | Automatically transmission and reception level adjusting transmitter-receiver |
| JPH04288738A (en) * | 1991-03-18 | 1992-10-13 | Tamura Electric Works Ltd | Privacy telephone system |
-
1986
- 1986-09-01 JP JP61205494A patent/JPS6361517A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309721A (en) * | 1989-05-24 | 1990-12-25 | Nec Corp | Automatically transmission and reception level adjusting transmitter-receiver |
| JPH04288738A (en) * | 1991-03-18 | 1992-10-13 | Tamura Electric Works Ltd | Privacy telephone system |
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