CN103067058B - Based on the shortwave transmitting-receiving integrated Digital Signal processing module of delay diversity - Google Patents
Based on the shortwave transmitting-receiving integrated Digital Signal processing module of delay diversity Download PDFInfo
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Abstract
The invention provides a kind of shortwave based on delay diversity transmitting-receiving integrated Digital Signal processing module, comprise: 6 A/D chips, 2 down-conversion chips, 6 up-converter modules, fpga chip, dsp chip and cpci bus, 6 A/D chips are connected to 2 down-conversion chips respectively, the output of 2 down-conversion chips is connected to fpga chip, dsp chip connects fpga chip, cpci bus carry out data interaction respectively, and the input of 6 up-converter modules connects fpga chip.Shortwave transmitting-receiving integrated Digital Signal processing module in the present invention, realize excitation and the reception of six shortwave passages, adopt delay diversity technology simultaneously, communication gain and antijamming capability can be improved, adopt CPCI interface can improve versatility and the compatibility of module in addition.
Description
Technical field
The present invention relates to electronic circuit field, and relate to a kind of shortwave based on delay diversity transmitting-receiving integrated Digital Signal processing module especially.
Background technology
In a wireless communication environment, channel fading is the principal element affecting signal quality, adopts multi-antenna diversity method then effectively can resist the decline of wireless channel, for communication system provides reliable information transmission.The general principle of multi-antenna diversity technology is the signal copy by multiple channel bearing identical information such as space, frequency, and the energy of multiple signals is got up according to certain compatible rule merging, the transmitting and receiving diversity technique in multi-antenna diversity technology all can obtain comparatively high diversity gain.Delay diversity technology wherein in transmit diversity is in fact manually manufactured a kind of dispersive channel, a narrow band frequency non-selective fading channel is become frequency selective fading channels, thus achieves transmit diversity.This method advantage realizes simply, being also easy to combine with the technology such as Space Time Coding, smart antenna, improves the reliability of physical layer information transmission.And in more existing Shortwave Communication System, often diversity technique and coding techniques are divided into different equipment, integrated design can not be realized, be difficult to the communication gain of maximum raising system.
Summary of the invention
The object of the invention is to provide one to control shortwave multichannel transceiver channel rapidly, and realize the transmitting-receiving of the shortwave based on the delay diversity integrated Digital Signal processing module of multi-channel data process, and adopt cpci bus to carry out exchanges data, data transmission bauds is fast, slot standard, signal are not easily disturbed, has higher reliability simultaneously.
For reaching above-mentioned purpose, the present invention proposes a kind of shortwave based on delay diversity transmitting-receiving integrated Digital Signal processing module, comprise: 6 A/D chips, 2 down-conversion chips, 6 up-converter modules, fpga chip, dsp chip and cpci bus, 6 A/D chips are connected to 2 down-conversion chips respectively, the output of 2 down-conversion chips is connected to fpga chip, dsp chip connects fpga chip, cpci bus carry out data interaction respectively, and the input of 6 up-converter modules connects fpga chip.
Wherein, when launching, dsp chip reads in voice data and external control order from cpci bus and encodes to voice data, delay disposal and modulation, after process, 6 channel datas are through 6 A/D chips, export 6 short out ripple radiofrequency signals, when receiving, 6 A/D chips are sampled to 6 short out ripple intermediate-freuqncy signals, the digital signal of sampling is given respectively two panels down-conversion chip, do Digital Down Convert process, then give fpga chip and do filtering process, the internal logic that fpga chip realizes module simultaneously controls, finally give dsp chip by FPGA by the digital signal after filtering process, by dsp chip, diversity process is realized to digital signal, demodulation code, and the final digital baseband signal that exports is to cpci bus.
Further, wherein also comprising memory, connecting fpga chip, for storing the program of fpga chip.
Further, when dsp chip is to described voice data delay disposal, select information bit cycle signal retardation, and when dsp chip realizes diversity process to digital signal, use equalizer or Viterbi decoding to obtain diversity gain.
Further, wherein A/D chip selects AD9957 chip, and down-conversion chip selects HSP50216 chip, and up-conversion chip selects AD9957 chip, and dsp chip selects TMS320C6455 chip, and FPGA adopts Cyclone ll FPGA.
To sum up, the shortwave transmitting-receiving integrated Digital Signal processing module in the present invention, realizes excitation and the reception of six shortwave passages, adopts delay diversity technology simultaneously, can improve communication gain and antijamming capability.Adopt CPCI interface can improve versatility and the compatibility of module in addition.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention based on the shortwave transmitting-receiving integrated Digital Signal processing module of delay diversity.
Signal transacting schematic diagram when Fig. 2 is the processing module transmitting of Fig. 1 intermediate waves transmitting-receiving integrated Digital Signal.
Signal transacting schematic diagram when Fig. 3 is the processing module reception of Fig. 1 intermediate waves transmitting-receiving integrated Digital Signal.
Embodiment
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
Fig. 1 is the theory diagram of the embodiment of the present invention based on the shortwave transmitting-receiving integrated Digital Signal processing module of delay diversity, as shown in Figure 1, based on the shortwave transmitting-receiving integrated Digital Signal processing module of delay diversity, comprise: 6 A/D chips, 2 down-conversion chips, 6 up-converter modules, fpga chip, dsp chip and cpci bus, 6 A/D chips are connected to 2 down-conversion chips respectively, the output of 2 down-conversion chips is connected to fpga chip, dsp chip connects fpga chip respectively, cpci bus also carries out data interaction, the input of 6 up-converter modules connects fpga chip.
Wherein adopt TMS320C6455 as dsp chip, this chip fast operation, memory source enrich, have encoding and decoding coprocessor, simultaneously with the master/slave mode interface of 32bit/33MHz PCI.Adopt the Cyclone ll FPGA of altera corp, fast operation, and support high speed differential data, select EPCS16 chip-stored FPGA program.A/D selects 6 AD9244, selects 2 down-conversion chip HSP50216,6 up-converter module AD9957.
Dsp chip reads in voice data and external control order by cpci bus, and state information is returned to cpci bus again by dsp chip simultaneously.Signal transacting schematic diagram when Fig. 2 is the processing module transmitting of Fig. 1 intermediate waves transmitting-receiving integrated Digital Signal.With reference to figure 1 and Fig. 2, during transmitting, DSP encodes to voice data, delay diversity and modulation, and six channel datas after process, through 6 AD9957 chips, export 6 short out ripple RF small signals.
When receiving, with reference to figure 1 and Fig. 3,6 AD9244 sample to 6 road short-wave signals, the digital signal of sampling is given respectively two panels HSP50216 chip (every sheet can process at most 4 channel signals) and do Digital Down Convert process, then give fpga chip and do filtering process, the internal logic that fpga chip realizes module simultaneously controls, and finally gives dsp chip by FPGA by the digital signal after filtering process, realizes diversity process, demodulation code by dsp chip.Wherein FPGA program is stored in EPCS16 chip, and DSP program is by cpci bus load operating.FPGA program is compiled by Quartus ll and generates, and DSP program is generated by the compiling of CCS instrument.
In delay diversity handling process, delay diversity process is carried out to 1 railway digital audio signal.First the signal that information source exports carries out chnnel coding, then becomes the identical information sequence in 6 tunnels through serioparallel exchange, goes out after eventually passing the delay of different length from 6 shortwave excitation channel emission.Signal on each excitation passage should be made uncorrelated to the selection of retardation, long delay can increase the complexity of receiving terminal equilibrium, therefore usually selects information bit cycle signal retardation.Equalizer or Viterbi decoding is used to obtain diversity gain during reception.
In sum, the shortwave based on delay diversity receives and dispatches excitation and the reception that integrated Digital Signal processing module can realize six shortwave passages; Adopt delay diversity technology, communication gain and antijamming capability can be improved.The present invention adopts CPCI interface can improve versatility and the compatibility of module simultaneously.In a wireless communication environment, channel fading is the principal element affecting signal quality, adopts multi-antenna diversity method then effectively can resist the decline of wireless channel, for communication system provides reliable information transmission.The general principle of multi-antenna diversity technology is the multiple signal copies being carried identical information by multiple channel (space, time, frequency), and the energy of multiple signals is got up according to certain compatible rule merging, the transmitting and receiving diversity technique in multi-antenna diversity technology all can obtain comparatively high diversity gain.Delay diversity technology wherein in transmit diversity is in fact manually manufactured a kind of dispersive channel, a narrow band frequency non-selective fading channel is become frequency selective fading channels, thus achieves transmit diversity.This method advantage realizes simple, is also easy to combine with the technology such as Space Time Coding, OFDM, AF panel and smart antenna, farthest improves the reliability of physical layer information transmission, have very high theory value and far-reaching realistic meaning.Along with the development of high-speed dsp and fpga chip, the operational capability of digital signal processing module is more and more stronger, can control shortwave multichannel transceiver channel rapidly, and realize multichannel delay diversity data processing.In addition, the present invention adopts cpci bus to carry out exchanges data, and data transmission bauds is fast, slot standard, signal are not easily disturbed, has higher reliability simultaneously.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (1)
1. the transmitting-receiving of the shortwave based on a delay diversity integrated Digital Signal processing module, it is characterized in that, comprise: 6 A/D chips, 2 down-conversion chips, 6 up-converter modules, fpga chip, dsp chip and cpci bus, 6 A/D chips are connected to 2 down-conversion chips respectively, the output of 2 down-conversion chips is connected to fpga chip, dsp chip connects fpga chip, cpci bus carry out data interaction respectively, and the input of 6 up-converter modules connects fpga chip
Wherein, when launching, dsp chip reads in voice data and external control order from cpci bus and encodes to voice data, delay disposal and modulation, 6 channel datas after process are through 6 A/D chips, export 6 short out ripple radiofrequency signals, when receiving, 6 A/D chips are sampled to 6 short out ripple intermediate-freuqncy signals, the digital signal of sampling is given respectively two panels down-conversion chip, do Digital Down Convert process, then give fpga chip and do filtering process, the internal logic that fpga chip realizes module simultaneously controls, finally give dsp chip by FPGA by the digital signal after filtering process, by dsp chip, diversity process is realized to digital signal, demodulation code, and the final digital baseband signal that exports is to cpci bus, also comprising memory, connecting fpga chip, for storing the program of fpga chip, when dsp chip is to described voice data delay disposal, select information bit cycle signal retardation, and when dsp chip realizes diversity process to digital signal, use equalizer or Viterbi decoding to obtain diversity gain.
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| CN103414484B (en) * | 2013-07-05 | 2015-07-08 | 熊猫电子集团有限公司 | Short-wave four-channel integrated channel machine |
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| CN103763000A (en) * | 2014-01-07 | 2014-04-30 | 熊猫电子集团有限公司 | Short wave transmitting and receiving all-in-one module based on CPCI bus |
| CN103995248B (en) * | 2014-04-30 | 2016-09-14 | 熊猫电子集团有限公司 | A kind of shortwave estimating two-dimensional direction-of-arrival digital signal processing module |
| CN106325140A (en) * | 2015-06-26 | 2017-01-11 | 华东师范大学 | Multi-channel short wave/ultrashort wave signal processing system and processing method based on FPGA |
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| CN107465430B (en) * | 2017-07-03 | 2021-04-02 | 北京无线电测量研究所 | CPCI bus-based frequency modulation signal parameter monitoring method and system |
| CN110492895A (en) * | 2019-07-16 | 2019-11-22 | 同方电子科技有限公司 | A kind of shortwave multi-channel parallel directly acquires reception system |
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| TWI726488B (en) * | 2019-11-19 | 2021-05-01 | 元太科技工業股份有限公司 | Proximity smart card and a method for operating a proximity smart card |
| CN111327356B (en) * | 2020-02-26 | 2022-08-09 | 航天恒星科技有限公司 | Demodulation device |
| CN115333567B (en) * | 2022-10-14 | 2023-02-28 | 南京冉思电子科技有限公司 | Unmanned aerial vehicle target simulation ware frequency conversion and fiber module |
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Effective date of registration: 20240314 Address after: 210046 Within Nanjing Economic and Technological Development Zone, Jiangsu Province (No. 301 Zhongshan East Road, Xuanwu District) Patentee after: PANDA ELECTRONICS GROUP Co.,Ltd. Country or region after: China Address before: 210002 No. 301 East Zhongshan Road, Jiangsu, Nanjing Patentee before: PANDA ELECTRONICS GROUP Co.,Ltd. Country or region before: China Patentee before: NANJING PANDA HANDA TECHNOLOGY Co.,Ltd. |