CN105897362A - Communication implementation method based on broadcasting DRM signal receiver - Google Patents

Communication implementation method based on broadcasting DRM signal receiver Download PDF

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Publication number
CN105897362A
CN105897362A CN201610319096.7A CN201610319096A CN105897362A CN 105897362 A CN105897362 A CN 105897362A CN 201610319096 A CN201610319096 A CN 201610319096A CN 105897362 A CN105897362 A CN 105897362A
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China
Prior art keywords
data
signal
frequency
decoding
fpga
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CN201610319096.7A
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Chinese (zh)
Inventor
张鹏泉
王保文
孔云苍
吴岩磊
陈艳超
杨新辉
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Tianjin Optical Electrical Communication Technology Co Ltd
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Tianjin Optical Electrical Communication Technology Co Ltd
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Priority to CN201610319096.7A priority Critical patent/CN105897362A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The invention relates to a broadcasting DRM signal receiver which comprises a front panel, a signal processing board and a receiving part. The front panel comprises a control panel and a signal source which are in bidirectional connection; the signal processing board comprises an interface management MCU, an ARM processor, an FPGA (Field Programmable Gate Array), an AD/DA, a network port chip, a configuration chip, an input filter and a crystal oscillator; the interface management MCU is responsible for driving a control panel, managing peripherals and decoding a signal source, is connected with the control panel through a network interface and is directly connected with a signal source driving circuit; the ARM processor is connected with the programmable logic device FPGA, is responsible for framing decomposition, energy diffusion, channel decoding, unit interleaving and QAM symbol mapping; the programmable logic device FPGA is responsible for constellation diagram mapping judgment, OFDM demodulation, quadrature demodulation and down conversion; and the input filter, an AD chip and the FPGA form a receiving channel. The communication implementation method based on the broadcasting DRM signal receiver has the beneficial effects of being high in transmission rate, strong in anti-fading and anti-multipath capabilities, cost-saving, space-saving, and optimized in power consumption.

Description

A kind of Realization Method of Communication based on broadcast DRM signal receiver
Technical field
The present invention relates to the Realization Method of Communication of a kind of signal receiver, particularly to a kind of Realization Method of Communication based on broadcast DRM signal receiver.
Background technology
DRM is the most unique off-patent digital display circuit, and for shortwave, medium wave and long wave, it can use the existing frequency and bandwidth spread all over the world, and is the major improvement to simulation AM broadcast.DRM will dominate the market of the AM multi-band broadcast of worldwide below 30MHz.The substantial amounts of fact also indicates that, other media such as the Internet and satellite broadcasting, can not substitute the broadcast of long, medium and short ripple to a great extent completely.Therefore, the broadcast of AM band can only use new technology, namely makes it revitalize by digitized, and the frequency resource having very much the long, medium and short wave-wave section of feature can not be discarded or be used for other purposes.
At AM band, the radio frequency range used owing to being supplied to each transmitter is the narrowest, therefore it provides the bandwidth for digital audio and video signals is the narrowest.Additionally, electric wave long-distance communications can produce the strongest interference and distortion.Accordingly, it is desirable to the strong digital audio compression method of ability and the modulator approach of strong anti-interference performance, to effectively compensate for transmission error and Transmission.
In terms of audio compression, DRM uses MPEG4 AAC(advanced audio) method, and by its SBR(Spectral Band Replication-band recovery with the exploitation of Coding Technologies company) technology combines, and constitutes the compression method that ability is the strongest at present in the world.Although the efficiency of only AAC own exceeds 30% than well-known MP3 encoding and decoding, yet with narrow limited bandwidth, it is inadequate for only using AAC.By the SBR of additional application, can be in the case of maintaining like high sound quality, data transfer rate can also lower 40% again.The most likely transmission data rate is the advanced audio signal of 25kb/s, far less than the 1/3 of isdn line.
For DRM, another requirement is so-called multipath transmisstion.Particularly there will be this multipath transmisstion effect at long, medium and short ripple, cause receiver to receive the identical radio wave having time delays from different directions, employ COFDM(COFDM) transmission method.Here, the signal of coding considers mistake correction, and is distributed and launch on various the carrier waves modulated.The method of this complexity in brief, can make common interference noise and signal fadeout (also known as channel fading) no longer occur.
Summary of the invention
nullConstitute in view of being processed board two parts by Base-Band Processing board and intermediate frequency data inside common DRM receiver，In order to cost-effective、Save space and optimize power consumption，The present invention provides a kind of and uses DRM technology、The unified signal receiver for same board，Concrete technical scheme is，DRM signal receiver is used in a kind of broadcast，Including front panel、Signal-processing board and receiving portion，It is characterized in that: front panel includes control panel and signal source，It is bi-directionally connected，Signal-processing board includes interface management MCU、Arm processor、FPGA、AD\DA、Network interface chip、Configuration chip、Input filter、And crystal oscillator，Wherein，Interface MCU is responsible for control panel and drives、Peripheral equipment management、The work such as source coding，It is connected with control panel by network interface，Directly it is connected with signal source drive circuit，Arm processor is connected with PLD FPGA，It is responsible for framing to decompose、Energy dissipation、Channel-decoding、Unit interweaves、Qam symbol mappings work，PLD FPGA is responsible for planisphere and maps judgement、OFDM demodulation、Quadrature demodulation、Down coversion works，By input filter、A/D chip and FPGA constitute reception passage.
Based on the broadcast Realization Method of Communication of DRM signal receiver, comprise the following steps, 1), source coding, it is achieved the multiple encoding and decoding of AAC subset, CELP subset, HVXC subset and the frequency band in MPEG4 compression and coding standard；2), MSC demultiplexing, according to communication pattern, flow of information and the data protection class of data transmission by audio frequency and data service framing again and decomposition；3), energy dissipation, generate pseudo-random sequence and primary traffic XOR according to the definition in ETSI ES 201 980 V3.1.1, reach the purpose of energy whitening；4), channel-decoding,
According to the deleted convolutional code defined in ETSI ES 201 980 V3.1.1, according to the requirement of communication pattern, transmission data are carried out the convolution encoding and decoding of different code check；5), unit deinterleave, according to the interleaving mode of different transmission mode determining means data, reach the purpose of resistance time and frequency dispersal；6), CRC check decoding,
According to definition to CRC check code in ETSI ES 201 980 V3.1.1, according to the demand of communication pattern, the control information of transmission is carried out CRC coding and verification；7), pilot tone insert, according to the definition in ETSI ES 201 980 V3.1.1, the subcarrier of sendaisle inserts the pilot signal with clear and definite phase and amplitude, carries out synchronizing and channel is estimated for receiving passage；8), OFDM symbol map, according to the definition in ETSI ES 201 980 V3.1.1 and communication pattern, the data in MSC, FAC, SDC and pilot tone are converted to frequency domain information, are assigned to transmit the appointment position in superframe；9), FFT, utilize FFT to be converted to adjudicate required frequency domain information by the time-domain signal of recipient；10), Cyclic Prefix protection interval, in order to farthest eliminate intersymbol interference, Cyclic Prefix is inserted at protection between OFDM symbol interval, it is ensured that receive the periodic integrity of data in FFT operation time；11), quadrature demodulation, recipient, be complex baseband data by specifying the data quadrature demodulation of frequency；12), Frequency Synchronization, by receiving the carrier frequency of passage and Phase synchronization to the carrier frequency of sendaisle and phase place, carry out coherent demodulation；13), time synchronized and symbol judgement, time synchronized utilizes Cyclic Prefix or the original position of pilot capture OFDM symbol, and symbol judgement is then that the frequency domain information obtained by FFT according to channel-estimation information is adjudicated binary data.
The invention has the beneficial effects as follows that there is compared with current short wave communication receiver the feature that transfer rate is high, anti-fading, ability of anti-multipath is strong；Compared with common DRM receiver, there is cost-effective, saving space and optimize the feature of power consumption.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the present invention.
Fig. 2 is the functional structure chart of the present invention.
Fig. 3 is the functional structure chart of the present invention.
Detailed description of the invention
As shown in Figure 1, 2, 3, DRM receiver is used in a kind of broadcast, it is achieved method comprises the following steps
1), source coding
Realize multiple encoding and decoding (the SBR-Spectral Band of the AAC subset in MPEG4 compression and coding standard, CELP subset, HVXC subset and frequency band Replication).
2), MSC (MSC) demultiplexing
According to communication pattern, flow of information and the data protection class of data transmission by audio frequency and data service framing again and decomposition.
3), energy dissipation
Generate pseudo-random sequence and primary traffic XOR according to the definition in ETSI ES 201 980 V3.1.1, reach the purpose of energy whitening.
4), channel-decoding
According to the deleted convolutional code defined in ETSI ES 201 980 V3.1.1, according to the requirement of communication pattern, transmission data are carried out the convolution encoding and decoding of different code check.
5), unit deinterleaves
According to the interleaving mode of different transmission mode (characteristic of channel) determining means data, reach the purpose of resistance time and frequency dispersal.
6), CRC check decoding
According to definition to CRC check code in ETSI ES 201 980 V3.1.1, according to the demand of communication pattern, the control information of transmission is carried out CRC coding and verification.
7), pilot tone is inserted
According to the definition in ETSI ES 201 980 V3.1.1, the subcarrier of sendaisle inserts the pilot signal with clear and definite phase and amplitude, carry out synchronizing and channel estimation for receiving passage.
8), OFDM symbol maps
According to the definition in ETSI ES 201 980 V3.1.1 and communication pattern, the data in MSC, FAC, SDC and pilot tone are converted to frequency domain information, are assigned to transmit the appointment position in superframe.
9), FFT
FFT is utilized to be converted to adjudicate required frequency domain information by the time-domain signal of recipient.
10), Cyclic Prefix protection interval
In order to farthest eliminate intersymbol interference, Cyclic Prefix is inserted at the protection interval between OFDM symbol, it is ensured that receive the periodic integrity of data in FFT operation time.
11), quadrature demodulation
Recipient, it is complex baseband data by the data quadrature demodulation of appointment frequency.
12), Frequency Synchronization
The carrier frequency of passage and Phase synchronization will be received to the carrier frequency of sendaisle and phase place, in order to carry out coherent demodulation.
13), time synchronized and symbol judgement
Time synchronized utilizes Cyclic Prefix or the original position of pilot capture OFDM symbol, and symbol judgement is then that the frequency domain information obtained by FFT according to channel-estimation information is adjudicated binary data.
For the purpose of cost-effective, saving space and optimization power consumption, being same board by receiver unification, agent structure is made up of three groups of Core Features, control core, general-purpose operation core and special arithmetic core, wherein, control core is responsible for communication system management, operational factor management and interface management；General-purpose operation core be responsible for performing parameter is changeable but arithmetic speed requires moderate function algorithm；Special arithmetic core is then responsible for parameter and is relatively fixed but arithmetic speed requires operation link that is high or that need accurate timing.

Claims (2)

  1. null1. DRM signal receiver is used in a broadcast，Including front panel、Signal-processing board and receiving portion，It is characterized in that: front panel includes control panel and signal source，It is bi-directionally connected，Signal-processing board includes interface management MCU、Arm processor、FPGA、AD\DA、Network interface chip、Configuration chip、Input filter、And crystal oscillator，Wherein，Interface MCU is responsible for control panel and drives、Peripheral equipment management、The work such as source coding，It is connected with control panel by network interface，Directly it is connected with signal source drive circuit，Arm processor is connected with PLD FPGA，It is responsible for framing to decompose、Energy dissipation、Channel-decoding、Unit interweaves、Qam symbol mappings work，PLD FPGA is responsible for planisphere and maps judgement、OFDM demodulation、Quadrature demodulation、Down coversion works，By input filter、A/D chip and FPGA constitute reception passage.
  2. 2. based on the broadcast Realization Method of Communication of DRM signal receiver, it is characterised in that: implementation method comprises the following steps,
    1), source coding
    Realize the multiple encoding and decoding of the AAC subset in MPEG4 compression and coding standard, CELP subset, HVXC subset and frequency band；
    2), MSC demultiplexing
    According to communication pattern, flow of information and the data protection class of data transmission by audio frequency and data service framing again and decomposition；
    3), energy dissipation
    According to ETSI ES 201 Definition in 980 V3.1.1 generates pseudo-random sequence and primary traffic XOR, reaches the purpose of energy whitening；
    4), channel-decoding
    According to ETSI ES 201 Transmission data are carried out the convolution encoding and decoding of different code check by the deleted convolutional code defined in 980 V3.1.1 according to the requirement of communication pattern；
    5), unit deinterleaves
    According to the interleaving mode of different transmission mode determining means data, reach the purpose of resistance time and frequency dispersal；
    6), CRC check decoding
    According to ETSI ES 201 Definition to CRC check code in 980 V3.1.1, carries out CRC coding and verification according to the demand of communication pattern to the control information of transmission；
    7), pilot tone is inserted
    According to ETSI ES 201 Definition in 980 V3.1.1, inserts the pilot signal with clear and definite phase and amplitude in the subcarrier of sendaisle, carries out synchronizing and channel estimation for receiving passage；
    8), OFDM symbol maps
    According to ETSI ES 201 Data in MSC, FAC, SDC and pilot tone are converted to frequency domain information by the definition in 980 V3.1.1 and communication pattern, are assigned to transmit the appointment position in superframe；
    9), FFT
    FFT is utilized to be converted to adjudicate required frequency domain information by the time-domain signal of recipient；
    10), Cyclic Prefix protection interval
    In order to farthest eliminate intersymbol interference, Cyclic Prefix is inserted at the protection interval between OFDM symbol, it is ensured that receive the periodic integrity of data in FFT operation time；
    11), quadrature demodulation
    Recipient, it is complex baseband data by the data quadrature demodulation of appointment frequency；
    12), Frequency Synchronization
    By receiving the carrier frequency of passage and Phase synchronization to the carrier frequency of sendaisle and phase place, carry out coherent demodulation；
    13), time synchronized and symbol judgement
    Time synchronized utilizes Cyclic Prefix or the original position of pilot capture OFDM symbol, and symbol judgement is then that the frequency domain information obtained by FFT according to channel-estimation information is adjudicated binary data.
CN201610319096.7A 2016-05-13 2016-05-13 Communication implementation method based on broadcasting DRM signal receiver Pending CN105897362A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110213182A (en) * 2018-02-28 2019-09-06 恩智浦有限公司 The method and apparatus of delay when reduction channel estimation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1575232A1 (en) * 2004-03-10 2005-09-14 Matsushita Electric Industrial Co., Ltd. Fast Fourier Transformation (FFT) with adaption of the sampling rate in Digital Radio Mondiale (DRM) receivers
CN101277287A (en) * 2007-03-29 2008-10-01 深圳赛意法微电子有限公司 DRM receiver with analog and digital separation filter as well as demodulation method
CN101277285A (en) * 2007-03-29 2008-10-01 深圳赛意法微电子有限公司 DRM receiver and demodulation method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1575232A1 (en) * 2004-03-10 2005-09-14 Matsushita Electric Industrial Co., Ltd. Fast Fourier Transformation (FFT) with adaption of the sampling rate in Digital Radio Mondiale (DRM) receivers
CN101277287A (en) * 2007-03-29 2008-10-01 深圳赛意法微电子有限公司 DRM receiver with analog and digital separation filter as well as demodulation method
CN101277285A (en) * 2007-03-29 2008-10-01 深圳赛意法微电子有限公司 DRM receiver and demodulation method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BROADCAS: "《ETSI ES 201 980 V3.1.1 数字无线联盟(DRM)》", 24 August 2009 *
马耀文: "基于FPGA的DRM接收机信道估计与解复用实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110213182A (en) * 2018-02-28 2019-09-06 恩智浦有限公司 The method and apparatus of delay when reduction channel estimation

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Application publication date: 20160824