CN102355297B - Receiver array based aviation telemetering system and implementation method thereof - Google Patents
Receiver array based aviation telemetering system and implementation method thereof Download PDFInfo
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- CN102355297B CN102355297B CN201110186635.1A CN201110186635A CN102355297B CN 102355297 B CN102355297 B CN 102355297B CN 201110186635 A CN201110186635 A CN 201110186635A CN 102355297 B CN102355297 B CN 102355297B
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Abstract
The invention discloses a receiver array based aviation telemetering system and an implementation method thereof. The telemetering system comprises an onboard part and a ground part, wherein the onboard part comprises a telemetering transmitter, and the ground part comprises an antenna array formed by omnidirectional antennas, a receiver outdoor unit and a receiver indoor unit. By building the omnidirectional antenna receiving array on the ground part, the traditional high gain automatic tracking parabolic antenna is replaced, compared with the high gain automatic tracking parabolic antenna, the weight is greatly reduced, certain anti vibration ability is provided, and the transportation or movement is convenient; simultaneously, the tracking ability for multi telemetering targets is provided; the reliability of the antenna during a long-time using process is increased, and the maintenance cost of the antenna during the using process is lowered; and in addition, the system has lower implementation cost. By adopting the spread spectrum coding and the spread spectrum decoding, the anti-interference ability of the system is added; and by adopting the error correction coding and the error correction decoding, the reliability of the system for transmitting data in a severe environment is improved.
Description
Technical field
The present invention relates to air communications field, specifically refer to aerial remote reconnaissance system and its implementation based on array acceptor.
Background technology
Traditional aerial remote reconnaissance system adopts high-gain to receive to realize from motion tracking parabolic antenna and a digital-to-analog, there is following problem and defect in it in actual applications: 1 system cost being caused from motion tracking parabolic antenna by high-gain is high, not easy care; 2 tracking antennas easily cause lose objects when target speed is too fast; 3 are difficult to spread spectrum to be applied in telemetry system and to cause the antijamming capability of system poor; 4 adopt single-carrier technology, are easily subject to the impact of the intersymbol interference that frequency dispersal that Doppler effect brings and multi-path transmission bring for the transmission of wideband telemetry data; 5 receivers adopt numeral, analog level signal, need extra front-end server to carry out after data preliminary treatment, and telemetry just can enter in the Ethernet at ground data center; 6 only can realize the remote measurement of point-to-point, can not realize the application demand of multiple target remote measurement simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of aerial remote reconnaissance system and its implementation based on array acceptor, reduce the weight of reception antenna, and make it possess certain anti-vibration ability, and be convenient to transportation or mobile, system is possessed the follow-up control to a plurality of remote measurement targets simultaneously; Make system possess the lower cost of realizing.
Object of the present invention is achieved through the following technical solutions:
Aerial remote reconnaissance system based on array acceptor, comprise airborne portion and above ground portion, it is characterized in that: described airborne portion comprises the telemetering transmiter that gathers aircraft system parameter, telemetering transmiter by the telemetry data transmission collecting to connected upconverter, upconverter carries out transferring to the power amplifier being connected with upconverter after up-conversion to the signal receiving, power amplifier carries out transferring to the transmitting antenna being connected with power amplifier after power amplification to the received signal, transmitting antenna is converted to the signal receiving electromagnetic wave signal and outwards sends, above ground portion comprises the antenna array that receives electromagnetic wave signal, antenna array is converted to the electromagnetic wave signal receiving high-frequency current signal and this high-frequency current signal is transferred to the receiver outdoor unit being connected with antenna array, receiver outdoor unit transfers to the receiver indoor unit being connected with receiver outdoor unit after the high-frequency current signal receiving is processed, receiver indoor unit is processed the signal receiving to be reduced to telemetry, and transfers to terminal equipment by Ethernet.By set up the mode that receiving matrix, the receiving matrix of omnidirectional antenna formation is connected with receiver outdoor unit, the receiving element of receiver outdoor unit is connected with receiver indoor unit on ground, the mode that has replaced high-gain to receive from motion tracking parabolic antenna, effectively reduced the weight of reception antenna, simultaneously receiving matrix can receive and cover transmitting of a plurality of not homologies in spatial domain, by frequency division or code minute mode, realized the object that simultaneously receives a plurality of telemetry parameters.
Described telemetering transmiter comprises data pre-processor, preliminary treatment before data pre-processor is launched the telemetered signal collecting also transfers to by the signal after processing the data slicer device being connected with data pre-processor, data slicer device becomes n signal by the signal slices receiving, n >=2 and be natural number, and passing through n channel transfer to frequency synthesizer, frequency synthesizer carries out the signal of n passage to transfer to the upconverter being connected with frequency synthesizer after frequency synthesis.Further say, by telemetry is decomposed into a plurality of signals at link layer, and the mode that a plurality of signals are processed respectively, guaranteed that the processing of each independent signal all meets the requirement of reception.
Described each passage includes the error correcting encoder connecting successively, spread spectrum coder, modulator-demodulator, digital up converter, peak factor attenuator disappears, described error correcting encoder is connected with data slicer device and receives wherein Yi road signal, this signal is transferred to spread spectrum coder after correction process and carry out spread processing, signal after spread processing transfers to modulator-demodulator and processes, signal after modem processes transfers to digital up converter and carries out frequency-conversion processing, the signal of processing through digital up converter transfers to the peak factor attenuator that disappears and processes, signal after the peak factor attenuator that disappears is processed transfers to the frequency synthesizer being connected with the peak factor attenuator that disappears.By a series of data processing, guarantee each independently signal all can be received, the reducibility of its parameter signal.
Described antenna array consists of n omnidirectional antenna, receiver outdoor unit comprises n separate receiving element, described omnidirectional antenna is corresponding one by one with receiving element, and each receiving element comprises a band pass filter and the low noise amplifier being connected with band pass filter.
Described receiver indoor unit comprises m separate reception & disposal unit, m >=1 and be natural number, each reception & disposal unit comprises a low-converter, n the signal processing channel being connected with low-converter, each low-converter is all connected with n receiving element of receiver outdoor unit, m low-converter is m group signal by the n of a receiver outdoor unit signal frequency conversion, and every group of signal comprises n signal; Each signal transfers to respectively separate signal processing channel, each signal processing channel comprises analog to digital converter, Digital Down Convert DDC, modulator-demodulator, the error correcting deocder connecting successively, on modulator-demodulator, be connected with PN code grabber, on PN code grabber, be connected with PN code tracking loop, PN code tracking loop is connected with modulator-demodulator, analog to digital converter is connected with low-converter, the output signal of error correcting deocder transfers to the digital signal panel being connected with output interface by output interface, digital signal panel is connected with terminal equipment by Ethernet.
Aerial remote reconnaissance method based on array acceptor, comprises the following steps:
(A) telemetering transmiter is installed aboard, telemetering transmiter is modulated on radio-frequency carrier by the telemetry collecting by upconverter and transfers to power amplifier and carries out power amplification, and the signal after amplification is converted to electromagnetic wave signal and is outwards sent by transmitting antenna;
(B) on ground, set up omnidirectional antenna receiving matrix, the receiving element of the signal that each omnidirectional antenna is received by a receiver outdoor unit carries out filtering and low noise amplification is processed, and carry out automatic gain control simultaneously;
(C) set up array acceptor indoor unit, array acceptor indoor unit comprises separate reception & disposal unit, each reception & disposal unit is connected with all receiving elements of receiver outdoor unit, and reception & disposal unit carries out the signal receiving to obtain baseband signal after data processing;
(D) baseband signal is reverted to link layer protocol bag by link layer protocol processing module;
(E) link layer protocol bag, enters data fusion module and carries out data fusion, reverts to transport layer protocol bag, and the telemetry obtaining through transport layer protocol processing module, is undertaken exporting terminal equipment to after Ethernet UDP packing by a CPU processing module.
Further, described step (A) comprises the following steps:
(A1) gather telemetry, and carry out preliminary treatment;
(A2) pretreated telemetry is switched to n signal, n >=2 and be natural number, n signal is handled as follows successively respectively in n passage:
(A21) first the individual signals after section is carried out to error correction coding processing;
(A22) secondly the signal after error correction is carried out to spread spectrum coding;
(A23) again the signal after spread spectrum is carried out to modulation /demodulation processing;
(A24) signal after modulation /demodulation is carried out to Digital Up Convert and be changed to high-frequency digital signal;
(A25) finally to the high-frequency digital signal peak attenuation processing that disappears;
(A3) n the signal through the peak attenuation processing that disappears synthesizes by frequency synthesizer;
(A4) signal after synthetic becomes high-frequency signal by up-conversion;
(A5) high-frequency signal amplifies by power amplifier, and outwards launches by transmitting antenna.
Further, described step (B) comprises the following steps:
(B1) set up the antenna array being formed by n omnidirectional antenna, set up the receiver outdoor unit being formed by n receiving element simultaneously;
(B2) transmitting of each isotropic receiving antenna receiving step (A), and received telemetered signal is handled as follows:
(B21) in band pass filter, carry out filtering processing;
(B22) in low noise amplifier, carry out low noise amplification, carry out automatic gain control simultaneously, when input signal strength is greater than threshold value, automatic gain controller is by by-passing signal low noise amplification.
Further, described step (C) comprises the following steps:
(C1) set up the receiver indoor unit that comprises m reception & disposal unit, the reception & disposal unit of each receiver indoor unit is all connected with n receiving element of receiver outdoor unit;
(C2) each reception & disposal unit of receiver indoor unit receives n receiving element output signal, the low-converter of reception & disposal unit is according to the center frequency point of carrier wave, respectively the signal receiving is carried out to frequency down-converts, form m*n signal and be sent to signal processing channel;
(C3) signal processing channel proceeds as follows received signal:
(C31) analog to digital converter will receive to such an extent that signal is converted to digital signal;
(C32) digital signal is digital intermediate frequency signal in Digital Down Convert DDC inner conversion;
(C33) digital intermediate frequency signal is transformed to original signal through modulator-demodulator;
(C34) original signal becomes baseband signal after error correcting deocder decoding.
The present invention compared with prior art, has following advantage and beneficial effect:
1 the present invention is based on aerial remote reconnaissance system and its implementation of array acceptor, the mode of omnidirectional antenna receiving matrix is set up in employing at above ground portion, replaced traditional high-gain from motion tracking parabolic antenna, with respect to high-gain from motion tracking parabolic antenna, its weight greatly reduces, possess certain anti-vibration ability, be convenient to transportation or mobile; Possesses the follow-up control to a plurality of remote measurement targets simultaneously; Increase the reliability of reception antenna in long-term use procedure, reduce reception antenna maintenance cost in use; And native system possesses the lower cost of realizing;
2 the present invention is based on aerial remote reconnaissance system and its implementation of array acceptor, at airborne portion, adopt spread spectrum coding, at above ground portion, adopt spreading spectrum and decoding, have increased the antijamming capability of system;
3 the present invention is based on aerial remote reconnaissance system and its implementation of array acceptor, at airborne portion, adopt error correction coding, at above ground portion, adopt error correction decoding, have increased the reliability of system transfer of data under adverse circumstances.
Accompanying drawing explanation
Fig. 1 is hardware connection diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention is based on the aerial remote reconnaissance system of array acceptor, comprise airborne portion and above ground portion, airborne portion comprises the telemetering transmiter that gathers aircraft system parameter, telemetering transmiter comprises data pre-processor, the data slicer device being connected with data pre-processor, data slicer device becomes n signal by the signal slices receiving, n >=2 and be natural number, and pass through n channel transfer to frequency synthesizer, frequency synthesizer carries out the signal of n passage to transfer to the upconverter being connected with frequency synthesizer after frequency synthesis, each passage includes the error correcting encoder connecting successively, spread spectrum coder, modulator-demodulator, digital up converter, peak factor attenuator disappears, the peak factor attenuator that disappears is connected with frequency synthesizer, frequency synthesizer is connected with upconverter as the output of telemetering transmiter, upconverter carries out transferring to the power amplifier being connected with upconverter after up-conversion to the signal receiving, power amplifier carries out transferring to the transmitting antenna being connected with power amplifier after power amplification to the received signal, and transmitting antenna is converted to the signal receiving electromagnetic wave signal and outwards sends, above ground portion comprises the antenna array that receives electromagnetic wave signal, antenna array consists of n omnidirectional antenna, receiver outdoor unit comprises n separate receiving element, omnidirectional antenna is corresponding one by one with receiving element, each receiving element comprises a band pass filter and the low noise amplifier being connected with band pass filter, low noise amplifier self attaches an automatic gain controller, when input signal strength is greater than threshold value, automatic gain controller, by by-passing signal low noise amplification, avoided strong input signal to cause the damage of equipment, receiver indoor unit comprises m separate reception & disposal unit, m >=1 and be natural number, the present embodiment is set m=4, each reception & disposal unit comprises a low-converter, n the signal processing channel being connected with low-converter, each low-converter is all connected with n receiving element of receiver outdoor unit, 4 low-converters are 4 groups of signals by the n of a receiver outdoor unit signal frequency conversion, and every group of signal comprises n signal, each signal transfers to respectively separate signal processing channel, each signal processing channel comprises the analog to digital converter connecting successively, Digital Down Convert DDC, modulator-demodulator, error correcting deocder, on modulator-demodulator, be connected with PN code grabber, on PN code grabber, be connected with PN code tracking loop, PN code tracking loop is connected with modulator-demodulator, analog to digital converter is connected with low-converter, the output signal of error correcting deocder transfers to the digital signal panel being connected with output interface by output interface, digital signal panel is by the signal of 4 groups of outputs, transfer in Protocol Processing Board, by baseband signal interface module receiving baseband signal, then through link layer protocol processing module, revert to link layer protocol bag, link layer protocol bag, enters data fusion module and carries out data fusion, reverts to transport layer protocol bag, the telemetry obtaining through transport layer protocol processing module, is undertaken exporting and transfer to terminal equipment after Ethernet UDP packing by a CPU processing module.
Aerial remote reconnaissance method based on array acceptor, comprises the following steps:
(A) telemetering transmiter is installed aboard, telemetering transmiter is modulated on radio-frequency carrier by the telemetry collecting by upconverter and transfers to power amplifier and carries out power amplification, signal after amplification is converted to electromagnetic wave signal and is outwards sent by transmitting antenna, and concrete steps are as follows:
(A1) gather telemetry, and carry out preliminary treatment;
(A2) pretreated telemetry is switched to n signal, n >=2 and be natural number, n signal is handled as follows successively respectively in n passage:
(A21) first the individual signals after section is carried out to error correction coding processing;
(A22) secondly the signal after error correction is carried out to spread spectrum coding;
(A23) again the signal after spread spectrum is carried out to modulation /demodulation processing;
(A24) signal after modulation /demodulation is carried out to Digital Up Convert and be changed to high-frequency digital signal;
(A25) finally to the high-frequency digital signal peak attenuation processing that disappears;
(A3) n the signal through the peak attenuation processing that disappears synthesizes by frequency synthesizer;
(A4) signal after synthetic becomes high-frequency signal by up-conversion;
(A5) high-frequency signal amplifies by power amplifier, and outwards launches by transmitting antenna;
(B) on ground, set up omnidirectional antenna receiving matrix, each omnidirectional antenna is received to such an extent that the receiving element of signal by a receiver outdoor unit carries out filtering and low noise amplification is processed, and carry out automatic gain control simultaneously, concrete steps are as follows:
(B1) set up the antenna array being formed by n omnidirectional antenna, set up the receiver outdoor unit being formed by n receiving element simultaneously;
(B2) transmitting of each isotropic receiving antenna receiving step (A), and received telemetered signal is handled as follows:
(B21) in band pass filter, carry out filtering processing;
(B22) in low noise amplifier, carry out low noise amplification, carry out automatic gain control simultaneously, when input signal strength is greater than threshold value, automatic gain controller is by by-passing signal low noise amplification;
(C) set up array acceptor indoor unit, array acceptor indoor unit comprises separate reception & disposal unit, each reception & disposal unit is connected with all receiving elements of receiver outdoor unit, reception & disposal unit carries out the signal receiving to obtain baseband signal after data processing, and concrete steps are as follows:
(C1) set up the receiver indoor unit that comprises m reception & disposal unit, the reception & disposal unit of each receiver indoor unit is all connected with n receiving element of receiver outdoor unit;
(C2) each reception & disposal unit of receiver indoor unit receives n receiving element output signal, the low-converter of reception & disposal unit is according to the center frequency point of carrier wave, respectively the signal receiving is carried out to frequency down-converts, form m*n signal and be sent to signal processing channel;
(C3) signal processing channel proceeds as follows received signal:
(C31) analog to digital converter will receive to such an extent that signal is converted to digital signal;
(C32) digital signal is digital intermediate frequency signal in Digital Down Convert DDC inner conversion;
(C33) digital intermediate frequency signal is transformed to original signal through modulator-demodulator;
(C34) original signal becomes baseband signal after error correcting deocder decoding;
(D) baseband signal is reverted to link layer protocol bag by link layer protocol processing module;
(E) link layer protocol bag, enters data fusion module and carries out data fusion, reverts to transport layer protocol bag, and the telemetry obtaining through transport layer protocol processing module, is undertaken exporting terminal equipment to after Ethernet UDP packing by a CPU processing module.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, the equivalent variations in every foundation technical spirit of the present invention, above embodiment done, within all falling into protection scope of the present invention.
Claims (4)
1. the aerial remote reconnaissance method based on array acceptor, is characterized in that, comprises the following steps:
(A) telemetering transmiter is installed aboard, telemetering transmiter is modulated on radio-frequency carrier by the telemetry collecting by upconverter and transfers to power amplifier and carries out power amplification, and the signal after amplification is converted to electromagnetic wave signal and is outwards sent by transmitting antenna;
(B) on ground, set up omnidirectional antenna receiving matrix, the receiving element of the signal that each omnidirectional antenna is received by a receiver outdoor unit carries out filtering and low noise amplification is processed, and carry out automatic gain control simultaneously;
(C) set up array acceptor indoor unit, array acceptor indoor unit comprises separate reception & disposal unit, each reception & disposal unit is connected with all receiving elements of receiver outdoor unit, and reception & disposal unit carries out the signal receiving to obtain baseband signal after data processing;
(D) baseband signal is reverted to link layer protocol bag by link layer protocol processing module;
(E) link layer protocol bag, enters data fusion module and carries out data fusion, reverts to transport layer protocol bag, and the telemetry obtaining through transport layer protocol processing module, is undertaken exporting terminal equipment to after Ethernet UDP packing by a CPU processing module.
2. the aerial remote reconnaissance method based on array acceptor according to claim 1, is characterized in that: described step (A) comprises the following steps:
(A1) gather telemetry, and carry out preliminary treatment;
(A2) pretreated telemetry is switched to n signal, n >=2 and be natural number, n signal is handled as follows successively respectively in n passage:
(A21) first the individual signals after section is carried out to error correction coding processing;
(A22) secondly the signal after error correction is carried out to spread spectrum coding;
(A23) again the signal after spread spectrum is carried out to modulation /demodulation processing;
(A24) signal after modulation /demodulation is carried out to Digital Up Convert and be changed to high-frequency digital signal;
(A25) finally to the high-frequency digital signal peak attenuation processing that disappears;
(A3) n the signal through the peak attenuation processing that disappears synthesizes by frequency synthesizer;
(A4) signal after synthetic becomes high-frequency signal by up-conversion;
(A5) high-frequency signal amplifies by power amplifier, and outwards launches by transmitting antenna.
3. the aerial remote reconnaissance method based on array acceptor according to claim 2, is characterized in that: described step (B) comprises the following steps:
(B1) set up the antenna array being formed by n omnidirectional antenna, set up the receiver outdoor unit being formed by n receiving element simultaneously;
(B2) transmitting of each isotropic receiving antenna receiving step (A), and received telemetered signal is handled as follows:
(B21) in band pass filter, carry out filtering processing;
(B22) in low noise amplifier, carry out low noise amplification, carry out automatic gain control simultaneously, when input signal strength is greater than threshold value, automatic gain controller is by by-passing signal low noise amplification.
4. the aerial remote reconnaissance method based on array acceptor according to claim 3, is characterized in that: described step (C) comprises the following steps:
(C1) set up the receiver indoor unit that comprises m reception & disposal unit, the reception & disposal unit of each receiver indoor unit is all connected with n receiving element of receiver outdoor unit;
(C2) each reception & disposal unit of receiver indoor unit receives n receiving element output signal, the low-converter of reception & disposal unit is according to the center frequency point of carrier wave, respectively the signal receiving is carried out to frequency down-converts, form m*n signal and be sent to signal processing channel;
(C3) signal processing channel proceeds as follows received signal:
(C31) analog to digital converter will receive to such an extent that signal is converted to digital signal;
(C32) digital signal is digital intermediate frequency signal in Digital Down Convert DDC inner conversion;
(C33) digital intermediate frequency signal is transformed to original signal through modulator-demodulator;
(C34) original signal becomes baseband signal after error correcting deocder decoding.
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| CN103561233A (en) * | 2013-10-21 | 2014-02-05 | 重庆邮电大学 | Ethernet digital image remote measuring encoder system |
| CN104219492B (en) * | 2013-11-14 | 2017-12-15 | 成都时代星光科技有限公司 | Unmanned plane image delivering system |
| CN104937969B (en) | 2013-12-31 | 2019-10-15 | 华为技术有限公司 | The method and apparatus for transmitting data |
| CN106506032A (en) * | 2016-11-24 | 2017-03-15 | 江西洪都航空工业集团有限责任公司 | A kind of peace control remote measurement integration general module |
| CN111245471B (en) * | 2020-04-03 | 2024-03-01 | 山西科泰航天防务技术股份有限公司 | Multi-target real-time telemetry method and system |
| CN111866620B (en) * | 2020-07-09 | 2022-03-29 | 成都傅立叶电子科技有限公司 | Multi-target measurement and control ground station system |
| CN115296681A (en) * | 2022-10-10 | 2022-11-04 | 南京信息工程大学 | Distributed multi-machine multi-channel self-tracking antenna system |
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| US6708019B2 (en) * | 2001-04-04 | 2004-03-16 | The Boeing Company | Method and apparatus using transmit beam lobing for identifying an interfering mobile terminal |
| CN1152236C (en) * | 2001-12-21 | 2004-06-02 | 北京航空航天大学 | Ground manipulating and monitor deivce for coaxial dual-rotor robot helicopter |
| CN102035648B (en) * | 2010-09-29 | 2012-11-14 | 北京航天自动控制研究所 | Safe and real-time soft recovery system and method for aircraft state information |
| CN202094887U (en) * | 2011-07-05 | 2011-12-28 | 成都睿兴通电子科技有限公司 | Aeronautical telemetering system based on receiving machine array |
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