CN103078671B - Short-wave receiving-transmitting integration system based on delay diversity - Google Patents
Short-wave receiving-transmitting integration system based on delay diversity Download PDFInfo
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Abstract
The invention provides a short-wave receiving-transmitting integration system based on delay diversity, and the short-wave receiving-transmitting integration system comprises a short-wave receiving-transmitting channel unit based on the delay diversity, a six-channel filter unit, six power amplifiers, six antenna tuning units and six short-wave antennas. When a signal is transmitted, the short-wave receiving-transmitting channel unit generates six radio frequency small signals through the delay diversity, the six radio frequency small signals are respectively filtered by the six-channel filter unit and amplified by the six power amplifiers to generate six 1kW short-wave radio frequency signals, and finally the short-wave radio frequency signals are respectively tuned through each short-wave antenna tuning units and transmitted by the short-wave antennas; and when the signal is received, the system can receive, demodulate and merge six signals. Due to the adoption of the system, a large-power transmitting and receiving function of six short-wave channels can be realized, and the system integration level can be improved. By adopting the delay diversity technology, the communication gain and interference resistance can be improved.
Description
Technical field
The present invention relates to electronic circuit design field, and particularly design the transceiving integrated system of a kind of shortwave based on delay diversity.
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 a kind of shortwave based on delay diversity transceiving integrated system, can realize the high-power transmitting and receiving function of six shortwave passages, improve level of integrated system.This equipment, by adopting delay diversity technology, can improve communication gain and antijamming capability.
For reaching above-mentioned purpose, the present invention proposes the transceiving integrated system of a kind of shortwave based on delay diversity, comprising: based on the short wave transmit-receive road unit of delay diversity, Hexamermis spp filter unit, No. six power amplifiers, six antenna tuners and six short-wave antennas.When wherein sending signal, short wave transmit-receive road cell delay diversity produces six road RF small signals, respectively by Hexamermis spp filtering unit filters, then amplify through No. six power amplifiers, produce the short-wave radio frequency signal of six road 1kW, last tuning respectively by each shortwave antenna tuning coupler, launched by short-wave antenna; During Received signal strength, this system can realize reception, the solution mediation merging of six road signals: first receive 6 short out ripple radiofrequency signals respectively by 6 short out wave antenna, then reception is carried out by 6 antenna tuners respectively tuning, deliver to after power amplifier place carries out Transmit enable in 6 channel filtering unit and carry out radiofrequency signal filtering, last 6 road signals are unified deliver in short wave transmit-receive road unit carry out 6 tunnel demodulation after single channel merge, channel-decoding becomes audio frequency and data.Because a set of short wave transmit-receive road unit supports at most process 6 tunnel radiofrequency signal so the signal≤road of process is all passable.
Further, wherein short wave transmit-receive road unit comprises: cpci bus and the main control module being connected to cpci bus, interface module, frequency synthesis module, radio-frequency module, digital signal processing module, front panel module and power module, wherein: main control module is suitable for performing and controls the operation of short wave transmit-receive road treatment facility, interface module is suitable for the external audio frequency of transmission and data-signal, frequency synthesis module is suitable for the clock signal and the mixed frequency signal that provide each road signal, radio-frequency module is suitable for carrying out filtering and frequency conversion to six road short-wave signals, and by the Signal transmissions after process to digital signal processing module, digital signal processing module postpones or diversity process audio frequency or data-signal, when transmitting, the copy of same audio signal is allowed to go out from different antenna transmissions after the retardation of different length, during reception, diversity process is carried out to data-signal.
Further, wherein said digital signal processing module comprises 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, the input of 6 up-converter modules connects fpga chip
Further, wherein, when launching, dsp chip reads in voice data and external control order from cpci bus and encodes to voice data, delay diversity 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 baseband 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 diversity process, 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, the transceiving integrated system of shortwave based on delay diversity according to claim 3, it is characterized in that, wherein A/D chip selects AD9957 chip, down-conversion chip selects HSP50216 chip, up-conversion chip selects AD9957 chip, and dsp chip selects TMS320C6455 chip, and FPGA adopts Cyclone II FPGA.
The present invention puies forward the high-power transmitting and receiving function that can realize six shortwave passages, improves level of integrated system.This equipment, by adopting delay diversity technology, can improve communication gain and antijamming capability.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the transceiving integrated system of the shortwave based on delay diversity of the embodiment of the present invention.
Fig. 2 is the theory diagram of Fig. 1 intermediate waves transceiver channel unit.
Fig. 3 is the theory diagram of digital signal processing module in Fig. 2.
Fig. 4 is signal transacting schematic diagram when digital signal processing module is launched in Fig. 3.
Fig. 5 is signal transacting schematic diagram when digital signal processing module receives in Fig. 3.
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.
As shown in Figure 1, this system forms by based on the short wave transmit-receive road unit of delay diversity, Hexamermis spp filter unit, No. six power amplifiers, six antenna tuners and six short-wave antennas the composition schematic diagram of the transceiving integrated system of the shortwave based on delay diversity.When wherein sending signal, short wave transmit-receive road cell delay diversity produces six road RF small signals, respectively by Hexamermis spp filtering unit filters, then amplify through No. six power amplifiers, produce the short-wave radio frequency signal of six road 1kW, last tuning respectively by each shortwave antenna tuning coupler, launched by short-wave antenna; During Received signal strength, this system can realize reception, the solution mediation merging [detailed process of supplementary Received signal strength reprocessing of six road signals, such as: short-wave antenna is sampled to shortwave intermediate-freuqncy signal, the digital signal of described antenna tuner to sampling carries out demodulation, then power amplifier amplifies the digital signal after demodulation, described filter unit carries out filtering to the signal after amplification, the output of filter unit connects short wave transmit-receive road unit, short wave transmit-receive road unit merges filtered signal, the signal after merging.。。。] (supplementary above, to please refer to)
Wherein Hexamermis spp filter unit can realize the filter function of six short out ripple radiofrequency signals.In this unit, due to the key that the switch switching wave band inductance and tuning capacitance is restriction tuned speed, so the serial/parallel composite construction electronic switch adopting PIN diode to form, there is high switching speed, and there is the overpowering feature of high-isolation, low insertion loss and high pass.Simultaneously in order to the insertion loss of compensation filter unit is on the impact of transmitting power, compensated by the amplifier of increase superlinearity, low noise after the filtering, reduce additional noise that amplifier brings into the impact of system.
Fig. 2 is the theory diagram of Fig. 1 intermediate waves transceiver channel unit.Short wave transmit-receive road unit comprises cpci bus and is connected to the main control module of cpci bus, interface module, frequency synthesis module, radio-frequency module, digital signal processing module, front panel module and power module, wherein: main control module is suitable for performing and controls the operation of short wave transmit-receive road treatment facility, interface module is suitable for the external audio frequency of transmission and data-signal, frequency synthesis module is suitable for the clock signal and the mixed frequency signal that provide each road signal, radio-frequency module is suitable for carrying out filtering and frequency conversion to multichannel short-wave signal, and by the Signal transmissions after process to digital signal processing module, digital signal processing module carries out delay diversity process to audio frequency or data-signal, the delay of the copy of same signal is allowed to go out from different antenna transmissions, equalizer or viterbi decoder is used to obtain diversity gain at receiving terminal.
Cpci bus is a kind of high performance industrial computer bus standard, can install the CPCI module of multiple standard, and realizes carrying out transfer of data and information exchange; Have extreme high reliability, impact resistance, high density and vibration resistance, can support more slot, not only data transmission bauds is fast but also slot standard, the not easily disturbed thus requirement that can reduce total beta radiation of digital signal.
Front panel module is suitable for providing friendly man-machine interface, realizes the human-computer interaction of operation and display.Interface module is suitable for the external audio frequency of transmission and data-signal.Main control module is suitable for performing and controls the operation of short wave transmit-receive road treatment facility, comprises Signal transmissions and processing controls, display and control, Digital Signal Processing control, external output of audio frequency and data-signal controls.In the present embodiment, main control module can load Windows XP or vxworks operating system, and the CPU in main control module is the X86 of 1.0GHz, inside save as 512M, and with two 10/100M self adaptation Ethernet interface, six serial ports, four road USB2.0, its pci bus meets CPCI2.0R2.1 standard.Main control module carries out data communication and control interface module, frequency synthesis module, radio-frequency module and digital signal processing module by cpci bus and each module, can monitor the state of modules simultaneously.
Frequency synthesis module provides clock signal and the mixed frequency signal of each road signal.
In the present embodiment, each radio-frequency module is suitable for carrying out filtering and frequency conversion to 2 road short-wave signals, produces intermediate-freuqncy signal, then the intermediate-freuqncy signal of each signalling channel is transferred to digital signal processing module processes.Meanwhile, if as when encouraging, the amplification of 20dB can be carried out to 2 tunnel radiofrequency signals.
Fig. 3 is the theory diagram of integrated Digital Signal processing module in Fig. 2, as shown in Figure 3, 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, cpci bus carry out data interaction respectively, and 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 II 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. 4 is the processing module transmitting of Fig. 3 intermediate waves transmitting-receiving integrated Digital Signal.With reference to figure 3 and Fig. 4, 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 3 and Fig. 5,6 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 II 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.
The transceiving integrated system of the shortwave based on delay diversity in the present invention, can realize the high-power transmitting and receiving function of six shortwave passages.This equipment, by adopting delay diversity technology, can improve communication gain and antijamming capability.System is made up of the unit that multiple integrated level is higher, can conserve space and weight significantly.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, can not realize integrated design, be difficult to the communication gain of maximum raising system, by contrast, native system greatly can improve integrated level.
This invention can be applied in short wave communication, improves the gain of level of integrated system and signal of communication.
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., based on the transceiving integrated system of shortwave of delay diversity, it is characterized in that, comprising:
Based on the short wave transmit-receive road unit of delay diversity, Hexamermis spp filter unit, No. six power amplifiers, six antenna tuners and six short-wave antennas,
When wherein sending signal; short wave transmit-receive road cell delay diversity produces six road RF small signals; respectively by Hexamermis spp filtering unit filters; then amplify through No. six power amplifiers; produce the short-wave radio frequency signal of six road 1kW; last tuning respectively by each shortwave antenna tuning coupler, launched by short-wave antenna; During Received signal strength, this system can realize reception, the solution mediation merging of six road signals: first receive 6 short out ripple radiofrequency signals respectively by 6 short out wave antenna, then reception is carried out by 6 antenna tuners respectively tuning, deliver to after power amplifier place carries out Transmit enable in 6 channel filtering unit and carry out radiofrequency signal filtering, last 6 road signals are unified deliver in short wave transmit-receive road unit carry out 6 tunnel demodulation after single channel merge, channel-decoding becomes audio frequency and data;
Wherein short wave transmit-receive road unit comprises: cpci bus and the main control module being connected to cpci bus, interface module, frequency synthesis module, radio-frequency module, digital signal processing module, front panel module and power module, wherein: main control module is suitable for performing and controls the operation of short wave transmit-receive road treatment facility, interface module is suitable for the external audio frequency of transmission and data-signal, frequency synthesis module is suitable for the clock signal and the mixed frequency signal that provide each road signal, radio-frequency module is suitable for carrying out filtering and frequency conversion to six road short-wave signals, and by the Signal transmissions after process to digital signal processing module, digital signal processing module postpones or diversity process audio frequency or data-signal, when transmitting, the copy of same audio signal is allowed to go out from different antenna transmissions after the retardation of different length, during reception, diversity process is carried out to data-signal,
Wherein said digital signal processing module comprises 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, 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 diversity 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 baseband 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 diversity process, 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.
2. the transceiving integrated system of the shortwave based on delay diversity according to claim 1, it is characterized in that, wherein A/D chip selects AD9957 chip, down-conversion chip selects HSP50216 chip, up-conversion chip selects AD9957 chip, dsp chip selects TMS320C6455 chip, and FPGA adopts Cyclone II FPGA.
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| CN103532586A (en) * | 2013-07-26 | 2014-01-22 | 熊猫电子集团有限公司 | Four-channel short wave receiving and sending unit based on Ethernet bus |
| CN103607548B (en) * | 2013-11-13 | 2017-08-04 | 四川福润得数码科技有限责任公司 | A kind of AV modulation output tuning receives integrated module |
| CN111917424B (en) * | 2020-08-05 | 2022-02-22 | 南京熊猫电子股份有限公司 | Low-emission broadband noise no-load short-wave radio station and implementation method thereof |
| CN112612319B (en) * | 2021-02-01 | 2024-05-03 | 西安空天电子技术有限公司 | BPM shortwave time number generator |
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| CN101296010A (en) * | 2007-04-24 | 2008-10-29 | 中兴通讯股份有限公司 | Channel estimation method suitable for space-frequency encoding cascade cycle detention diversity mode |
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