CN103701488A - S-mode responder with automatic dependent surveillance broadcast mode capability for 1090-megahertz extension telegraph text - Google Patents
S-mode responder with automatic dependent surveillance broadcast mode capability for 1090-megahertz extension telegraph text Download PDFInfo
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Abstract
The invention discloses an S-mode responder with the automatic dependent surveillance broadcast mode capability for a 1090-megahertz extension telegraph text. The S-mode responder comprises an antenna, a receiving module, a radio frequency sampling module, a data processing module, a signal processing module and a transmitter module, wherein the antenna is used for receiving a 1030-megahertz signal and a 1090 MHz (megahertz) signal and sending the 1090 MHz signal; the receiving module is used for carrying out amplitude limitation, clutter removal and amplification to the signal; the radio frequency sampling module is used for sampling the signal; the signal processing module is used for identifying and decoding the signal to identify whether the signal is 1030MHz A/C/S interrogating signal or a 1090ESADS-BIN signal, and the decoded signal is sent to the data processing module; the data processing module is used for processing the decoded signal; the signal processing module is used for coding an answering signal sent from the data processing module and/ or initiatively generating an 1090ESADS-BOUT coding signal in a 1090ESADS-BOUT time sequence according to the data sent from the data processing module; and the transmitter module is used for transmitting the signal.
Description
Technical field
The present invention relates to air traffic control and air traffic safety and monitor field, relate in particular to a kind of S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts.
Background technology
S pattern answering machine can tie surface secondary radar or airborne TCAS system works, common compatible original ATCRBS (ATCRBS) A/C pattern answering machine function (being conventionally called for short ATC answering machine), also possesses Discrete Address Beacon System (DABS simultaneously, be called for short S pattern) S pattern answering machine function, and coordinate airborne TCAS system to realize absolutely empty coordination collision avoidance.S pattern answering machine receives 1030MHz request signal, transmitting 1090MHz answer signal, and answer signal has respectively A pattern, C pattern and S pattern etc. according to interrogation mode difference.
1090ESADS-B be utilize Air-Ground, air-air ,-ground data communication completes a kind of new navigation technology that traffic monitoring and information are transmitted.The Data-Link that our times various countries mainly adopt has 1090MHzS mode expansion telegraph text data chain (1090ES), general-purpose accessing radio station Data-Link (UAT) and very high frequency(VHF) Data-Link pattern 4(VDLMode4) etc. three kinds, wherein 1090ES is the interoperable ADS-B Ground-to-Air Data Link in the whole world of International Civil Aviation Organization (ICAO) recommendation.During airborne equipment work, receive in real time the information such as position of flight intention and navigation system output, use 1090MHz tranmitting frequency that the machine static information (as identification code, catchword, communication capacity etc.) and multidate information (as air position, scene position, highly, flight trend etc.) are encoded into DF17 or DF18 message periodic broadcasting is gone out, inform aircraft and the ground surveillance equipment of closing on; Simultaneously, the machine also can receive other platform broadcast 1090ESADS-BOUT data on Zhong Huo ground, spatial domain by 1090ESADS-BIN function, ground and aerial aircraft all can be seen by aircraft and ground station like this, obtain in the air and traffic above-ground situation and the information relevant to flight safety thereof.ICAO has been defined as ADS-B the main direction of following surveillance technology development, actively pushing forward this technology, some countries have dropped into practical S pattern answering machine and ADS-B surveillance equipment, as the important sensing equipment of airborne aerial Situation Awareness, be also the important situation awareness information source of surface surveillance system on the other hand on the one hand.
It is base band video sampling and IF bandpass sampling that current industry is used Sampling techniques comparatively widely, at radio-frequency front-end, added analog frequency mixing circuit, radiofrequency signal is become to the intermediate-freuqncy signal that bandwidth is moderate, by logarithmic amplification, process again, detection goes out vision signal or direct intermediate frequency (IF) Sampling is processed, this scheme has alleviated the work load of A/D chip, also has in design the ripe case can be for reference.Radio frequency Direct Sampling structure extremely approaches software radio ideal standard, sample frequency is higher, performance is also better, on the basis of labor signal receiving module of the present invention and radio frequency sampling functions of modules and composition, in conjunction with current device level, use the L-band radiofrequency signal Direct Sampling that totally digitilized receiver module is 2GHz to highest frequency to realize.At present existing part S pattern answering machine possesses 1090ESADS-BOUT function, and 1090ESADS-BIN function is realized by TCAS receiving circuit conventionally or realized the equipment also S pattern answering machine, 1090ESADS-BOUT and 1090ESADS-BIN all functions not being integrated by independent 1090ESADS-BIN equipment.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts, can have function and 1090ESADS-BOUT and the 1090ESADS-BIN all functions of traditional A/C/S interrogation mode simultaneously.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts is provided, it has the answering of A/C/S mode query and 1090ESADS-B function, comprise: antenna, for receiving 1030MHz and 1090MHz signal and sending 1090MHz signal; Receiver module, is connected with antenna, for the 1030MHz receiving and 1090MHz signal being carried out to amplitude limit, impurity elimination ripple and amplification by antenna; Radio frequency sampling module, is connected with receiver module, for the signal after receiver module is processed is sampled and is converted to digital signal; Signal processing module, be connected with radio frequency sampling module, for the signal after radio frequency sampling module samples is identified and is decoded, to identify A/C/S request signal or the 1090ESADS-BIN signal that the signal receiving is 1030MHz, and decoded signal is sent to data processing module; Described data processing module, be connected with signal processing module with the external equipment in aircraft and be connected, be used for receiving through decoded signal and to this decoded signal and process, wherein, the A/C/S request signal that the decoded signal receiving when data processing module is 1030MHz, sends the answer signal relevant to this A/C/S request signal to signal processing module; When the signal receiving is 1090ESADS-BIN signal, this signal is sent to external equipment to show this signal; Described signal processing module, also encodes for the relevant answer signal that data processing module is sent and/or the data that send according to data processing module and initiatively generate 1090ESADS-BOUT code signal according to 1090ESADS-BOUT sequential; And transmitter module, for the signal after signal processing module coding is launched.
Wherein, described antenna comprises heaven line and lower antenna.
Wherein, described receiver module comprises: receipts that be connected low pass filter with antenna, are connected with low pass filter/send out switch, with receive/amplitude limiter, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter that a switch is connected and the low noise amplifier being connected with 1030-1090MHz band pass filter, or receipts that be connected low pass filter, the circulator being connected with antenna with antenna, are connected with circulator/send out switch, with the receive/amplitude limiter that a switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter, the low noise amplifier that is connected with 1030-1090MHz band pass filter, or be connected low pass filter with antenna, the receipts that are connected with a low pass filter/switch, with the amplitude limiter that receipts/switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter and the low noise amplifier being connected with 1030-1090MHz band pass filter, the power splitter being connected with low noise amplifier, the 1030MHz analog filter being connected with power splitter and 1090MHz analog filter, the 1030 signal low noise amplifiers that are connected with 1090MHz analog filter with 1030MHz analog filter respectively and 1090 signal low noise amplifiers, or be connected low pass filter with antenna, be connected circulator with low pass filter, the receipts that are connected with a circulator/switch, with the amplitude limiter that receipts/switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter and the low noise amplifier being connected with 1030-1090MHz band pass filter, the power splitter being connected with low noise amplifier, the 1030MHz analog filter being connected with power splitter and 1090MHz analog filter, the 1030 signal low noise amplifiers that are connected with 1090MHz analog filter with 1030MHz analog filter respectively and 1090 signal low noise amplifiers.
Wherein, described signal processing module comprises: the digital quadrature transformation device group unit, be connected and signal is carried out to pretreated video pre-filtering unit with described the digital quadrature transformation device group unit, the A/C/S mode query signal decoding unit that is connected with described video pre-filtering unit and 1030MHz signal is decoded and the 1090ES-ADS-BIN signal decoding unit that 1090MHz signal is decoded, reply PPM/PCM coding unit with the S pattern that described A/C/S mode query signal decoding unit is connected, the 1090ESADS-BOUT code signal coding unit being connected with data processing module, wherein, described A/C/S mode signal inquiry decoding unit is also connected with data processing module with 1090ES-ADS-BIN signal decoding unit, for being sent to data processing module, processes decoded signal, described S pattern is replied PPM/PCM coding unit and is connected with data processing module, for according to data processing module, send with the corresponding answer signal of request signal, described 1090ESADS-BOUT coding unit is connected with data processing module, 1090ESADS-BOUT sequential and the information according to data module, initiatively sent are encoded, or the digital quadrature transformation device group unit, the video pre-filtering unit being connected with described the digital quadrature transformation device group unit, the A/C/S mode query signal decoding unit and the 1090ES-ADS-BIN signal decoding unit that are connected with described video pre-filtering unit, reply PPM/PCM coding unit with the S pattern that described A/C/S mode query signal decoding unit is connected, the 1090ESADS-BOUT code signal coding unit being connected with data processing module, reply with S pattern the DA chip data dispensing unit that PPM/PCM coding unit is connected with 1090ESADS-BOUT code signal coding unit, described A/C/S mode signal inquiry decoding unit is also connected with data processing module with 1090ES-ADS-BIN signal decoding unit, for being sent to data processing module, processes decoded signal, described S pattern is replied PPM/PCM coding unit and is also connected with data processing module, for according to data processing module, send with the corresponding answer signal of request signal, described 1090ESADS-BOUT code signal coding unit is also connected with data processing module, for 1090ESADS-BOUT sequential and the information initiatively sent according to data processing module, encode, wherein, described the digital quadrature transformation device group unit is to two-way 1030MHz numerical sequence signal X
1(n), X
2(n) with two-way 1090MHz numerical sequence signal X
3(n), X
4(n) carry out orthogonal transform processing, then result is sent into video pre-filtering unit, or in internal build multichannel 1030MHz and 1090MHz digital filter bank, to extract respectively 1030MHz request signal Serial No. X
1(n), X
2(n) with 1090ESADS-BIN signal digital sequence X
3(n), X
4(n), then build the digital quadrature transformation device group described numerical sequence signal is carried out to orthogonal transform processing, then result is sent into video pre-filtering unit.
Wherein, described video pre-filtering unit comprises: signal characteristic abstraction unit, for the signal to after quadrature transformer group cell processing, carry out pulse characteristics extraction; Up/down antenna selected cell, is 1030MHz signal for the signal when receiving, and up/down antenna reception is compared to output one antenna selection signals Yu Yi road, road ASK envelope demodulation signal to two paths of signals amplitude or the time of advent; ASK envelope demodulation unit, is connected with up/down antenna selected cell with described signal characteristic abstraction unit, for receiving upper and lower antenna selected cell transmission Yi road signal, carries out demodulation; Also for the 1090MHz signal that signal characteristic abstraction unit is sent, carry out demodulation.
Wherein, described A/C/S mode query signal decoding unit is also connected with described data processing module, for decoded request signal is sent to data processing module; Described decoding unit comprises: signal mode judgement unit is S mode query signal or A/C mode query signal for the signal after ASK envelope demodulation being differentiated to described 1030MHZ signal; If 1030MHZ signal is S mode query signal, by the P of this S mode query signal
6pulse and each enable signal sequential are decoded and are processed with message analysis after adjusting together, wherein the P of S mode query signal
6pulse adopts DPSK modulation system, and processing procedure is first for P
6the message signals of pulse is carried out DPSK demodulation, and the 24 bit address information that wherein comprise are carried out to CRC check, if obtain through check, this address is consistent with the machine address to be notified S pattern to reply PPM/PCM coding unit to encode and reply; If 1030MHz signal is A/C signal, notifies S pattern to promise PPM/PCM coding unit to encode and reply.
Wherein, described S pattern is replied PPM/PCM coding unit and is also connected with data processing module, for the answer signal relevant to request signal sending according to data processing module, encode, S pattern is replied PPM/PCM coding unit and is comprised PPM coding unit and pcm encoder unit, and described PPM coding unit is for carrying out encoding the response to S mode query signal; Described pcm encoder unit is for carrying out encoding the response to A/C mode query signal.
Wherein, described transmitter module comprises: with the high-speed d/a transducer of DDS function, the pre-amplifier being connected with high-speed d/a transducer, the 1090MHz analog filter being connected with described pre-amplifier, the power amplifier and the antenna selection switch that are connected with described analog filter, described D/A converter receives the I/Q orthogonal signalling that signal processing module produces, D/A chip configuration data-signal and reference clock signal, according to described signal, produce the 1090MHz radiofrequency signal process pre-amplifier with specified signal, 1090MHz filter, power amplifier is sent to antenna after processing, transmission with the 1090ESADS-BOUT code signal that carries out answer signal or data processing module is initiatively generated, or modulator, the pre-amplifier being connected with modulator, the 1090MHz analog filter being connected with pre-amplifier, the power amplifier being connected with analog filter and antenna selection switch, described modulator is modulated with the 1090MHZ carrier signal that modulation selects signal to provide frequency source according to the PPM of signal processing module output or pcm encoder answer signal, the radiofrequency signal with provisioning information after modulation is sent into pre-amplifier, 1090MHz filter, power amplifier is sent to antenna after processing, transmission with the 1090ESADS-BOUT code signal that carries out the transmission of answer signal or data processing module is initiatively generated, described antenna selection switch is used for selecting antenna or lower antenna to send answer signal or 1090ESADS-BOUT code signal.
Wherein, described antenna adopts omnidirectional antenna.
The invention has the beneficial effects as follows: be different from the situation of prior art, the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts of the present invention, has following beneficial effect:
One, the present invention becomes one standard S pattern answering machine and two functions of 1090ESADS-B, and an equipment has been realized two functions, compact conformation, information category is many, contain much information, and integrated level is high, has reduced equipment complexity is installed, simplify platform master-plan, saved cost;
Two, receiver module of the present invention is not transformed into intermediate-freuqncy signal by Analogue mixer by radiofrequency signal, but Direct Sampling radiofrequency signal builds digital quadrature device group and replaces low-converter in FPGA; Transmitter module is not transformed into radiofrequency signal by Analogue mixer by intermediate-freuqncy signal simultaneously, but directly export radiofrequency signal by the DA chip with DDS function or modulator, due to without using up/down frequency converter and interlock circuit, radio circuit is simple, digitized degree is high, reduce equipment power dissipation and weight, greatly improved reliability;
Three, two functions of the present invention share aircraft up/down two slave antennas (Small General Aircraft also can be installed common antenna), compare with equipped standalone feature equipment, and required antenna amount reduces by half, and has reduced the design difficulty of airframe antenna layout, has facilitated the maintenance of antenna;
Four, the present invention can carry out antenna amount and circuit structure cutting according to the different demands of application platform, the requirement of the different application platforms such as, ground airborne to meet; By the continuous expansion of data processing software and upgrading are upgraded, can adapt to different ADS-B application; Also can adjust local circuit, expansion, with functions such as UATADS-B, DME of frequency range, is further expanded range of application of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the block diagram of S pattern answering machine first embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 2 is the block diagram of S pattern answering machine second embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 3 is the block diagram of S pattern answering machine the 3rd embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 4 is the block diagram of S pattern answering machine the 4th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 5 is the block diagram of S pattern answering machine the 5th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 6 is the block diagram of S pattern answering machine the 6th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Fig. 7 is the block diagram of signal processing module in the S pattern answering machine first, second, third of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts and the 4th embodiment;
Fig. 8 is the block diagram of signal processing module in the S pattern answering machine the 5th of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts and the 6th embodiment;
Fig. 9 is the block diagram of S pattern answering machine transmitter module first embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Figure 10 is the block diagram of S pattern answering machine transmitter module second embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts;
Figure 11 is the S pattern answering machine transmitter module radio frequency sampling of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts and the block diagram of the digital quadrature transformation device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
About term:
Before embodiments of the invention are described, need to carry out necessary explaining to some terms.
Such as: if occur herein, the terms such as " first ", " second " describe various elements, but these elements should not limited by these terms.These terms are only used for distinguishing an element and another element.Therefore " first " element of, below discussing also can be called as " second " element and not depart from instruction of the present invention.Should be understood that, when mentioning an element " connection " or " connection " to another element, it can directly connect or directly be connected to another element or also can have intermediary element.On the contrary, when mentioning that an element " directly connects " or " directly connecting " arrives another element, there is not intermediary element.
Be understandable that, the term using in this article is only not intended to as limitation of the invention for describing the object of concrete execution mode.As " antenna " that below use, unless context clearly point out in addition, singulative intention also comprises plural form.
What can further understand is, when using in this manual term " to comprise " and/or when " including ", these terms have indicated the existence of described feature, integral body, step, operation, element and/or parts, but also do not get rid of the existence of above other features, integral body, step, operation, element, parts and/or its group and/or add.
About execution mode:
A kind of S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts of the present invention, it has the answering of A/C/S mode query and 1090ESADS-B function, specifically comprise with lower module: antenna, for receiving 1030MHz and 1090MHz signal and sending 1090MHz signal; Receiver module, is connected with antenna, for the 1030MHz receiving and 1090MHz signal being carried out to amplitude limit, impurity elimination ripple and amplification by antenna; Radio frequency sampling module, is connected with receiver module, for the signal after receiver module is processed is sampled and is converted to digital signal; Signal processing module, be connected with radio frequency sampling module, for the signal after radio frequency sampling module samples is identified and is decoded, to identify A/C/S request signal or the 1090ESADS-BIN signal that the signal receiving is 1030MHz, and decoded signal is sent to data processing module; Described data processing module, be connected with signal processing module with the external equipment in aircraft and be connected, be used for receiving through decoded signal and to this decoded signal and process, wherein, the A/C/S request signal that the decoded signal receiving when data processing module is 1030MHz, sends the answer signal relevant to this A/C/S request signal to signal processing module; When the signal receiving is 1090ESADS-BIN signal, this signal is sent to external equipment to show this signal; Described signal processing module, also encodes for the relevant answer signal that data processing module is sent and/or the data that send according to data processing module and initiatively generate 1090ESADS-BOUT code signal according to 1090ESADS-BOUT sequential; And transmitter module, for the signal after signal processing module coding is launched.In addition, antenna implementation of the present invention adopts omnidirectional antenna a period of time.
Particularly, refer to Fig. 1, Fig. 1 is the block diagram of S pattern answering machine first embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The S pattern answering machine of the Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts of the present embodiment comprises signal processing module 14 and the data processing module 15 being connected with signal processing module 14 and the transmitter module 16 that radio frequency sampling module 13 that antenna 10 and upper antenna 11, the receiver module 12 being connected with upper antenna 11 with upper antenna 10 are connected with receiver module 12 is connected with radio frequency sampling module 13, and described data processing module 15 is connected with external equipment by communication interface.Wherein:
Described upper antenna 10 and upper antenna 11, for receiving 1030MHz and 1090MHz signal and sending 1090MHz signal;
Described receiver module 12 is two-way receive path, comprise the first low pass filter 121 being connected with upper antenna 10, first receive/the switch 122 being connected with the first low pass filter 121, with the first amplitude limiter 123 that the first receipts/switch 122 is connected, the 1030-1090MHz bandpass analog filter 124 being connected with the first amplitude limiter 123, be connected the first low noise amplifier 130 with a 1030-1090MHz bandpass analog filter 124, the first power splitter 125 being connected with described the first low noise amplifier 130, the 1030MHz analog filter 126 being connected with the first power splitter 125 and a 1090MHz analog filtering 127, the 1030MHz low noise amplifier 128 and the 1090MHz low noise amplifier 129 that are connected with a 1090MHz analog filtering 127 with a 1030MHz analog filter 126 respectively, and
The second low pass filter 121 ＇ that are connected with upper antenna 11, the second receive/switch 122 ＇ that are connected with the second low pass filter 121 ＇, with the second amplitude limiter 123 ＇ that the second receipts/switch 122 ＇ is connected, the 2nd 1030-1090MHz bandpass analog filter 124 ＇ that are connected with the second amplitude limiter 123 ＇, the second low noise amplifier 130 ＇ that are connected with the 2nd 1030-1090MHz bandpass analog filter 124 ＇, the second power splitter 125 ＇ that are connected with described the second low noise amplifier 130 ＇, the 2nd 1030MHz analog filter 126 ＇ that are connected with the second power splitter 125 ＇ and the 2nd 1090MHz analog filter 127 ＇, the 2nd 1030MHz low noise amplifier 128 ＇ and the 2nd 1090MHz low noise amplifier 129 ＇ that are connected with the 2nd 1090MHz analog filter 127 ＇ with the 2nd 1030MHz analog filter 126 ＇ respectively.
Wherein, low pass filter 121,121 ＇, for carrying out to the received signal filtering, allow to pass through lower than the signal of predeterminated frequency; Receive/send out switch 122,122 ＇, for reception and the sending function of switched antenna; Amplitude limiter 123,123 ＇ are for being limited to amplitude output signal within the scope of 1030MHz and 1090MHz; 1030-1090MHz bandpass analog filter 124,124 ＇ are for allowing the signal of 1030-1090MHz frequency band by shield other frequency band signals simultaneously; Described low noise amplifier 130,130 ＇ are for amplifying signal; Described power splitter 125,125 ＇ are for being divided into two-way by signal; Described 1030MHz analog filter 126,126 ＇ and 1090MHz analog filter 127,127 ＇ are respectively used to eliminate the clutter of 1030MHz and 1090MHz signal; Described 1030MHz low noise amplifier 128,128 ＇ and 1090MHz low noise amplifier 129,129 ＇ are respectively used to 1030MHz and 1090MHz signal to amplify.
By upper and lower antenna reception to 1030MHz/ or 1090MHz signal after low pass filter, amplitude limiter, bandpass analog filter are processed, by power splitter, carry out subchannel processing, if 1030MHz signal is carried out filtering, amplified by 1030MHz low noise amplifier by 1030MHz analog filter, be then sent to radio frequency sampling module 13; If 1090MHz signal is carried out filtering, amplified by 1090MHz low noise amplifier by 1090MHz analog filter, be then sent to radio frequency sampling module 13; The signal that radio frequency sampling module 13 receives gathers.
Described radio frequency sampling module 13 comprises 4 A/D converters 131, for receiving the signal after any road, four tunnels or several roads low noise amplifier amplify, and this signal is gathered and carries out mould/number conversion.
Described signal processing module 14, for the signal after 13 samplings of radio frequency sampling module is identified and is decoded, to identify A/C/S request signal or the 1090ESADS-BIN signal that the signal receiving is 1030MHz, and decoded signal is sent to data processing module 15.
Described signal processing module 14, also encodes for the relevant answer signal that data processing module 15 is sent and/or the data that send according to data processing module 15 and initiatively generate 1090ESADS-BOUT code signal according to 1090ESADS-BOUT sequential;
Described external equipment can comprise the airborne equipments such as comprehensive aobvious control, air data computer (ADC), Global Navigation Satellite System (GNSS), inertial navigation system (IRS), flight management system (FMS).
Embodiment of the present invention, by upper, upper antenna reception 1030MHz and 1090MHz signal, by the first and/or second amplitude limiter, 1030MHz and 1090MHz signal are carried out to amplitude limiting processing, by the first and/or the 2nd 1030-1090MHz bandpass analog filter, shield other frequency band signals, by the first and/or second low noise amplifier, signal is amplified, by the first and/or second power splitter, signal is respectively divided into two-way 1030MHz and two-way 1090MHz signal, by the first and/or the 2nd 1030MHz filter, 1030MHz signal is carried out to filtering, by the first and/or the 2nd 1090MHz filter, 1090MHz is carried out to filtering, by the first and/or the 2nd 1030MHz low noise amplifier, 1030MHz signal is amplified, by the first and/or the 2nd 1090MHz low noise amplifier, 1090MHz signal is amplified, to send into radio frequency sampling module through amplifying signal again samples and analog-to-digital conversion, digital signal after conversion is sent into signal processing module and is decoded and identify, to determine A/C/S request signal or 1090ES ADS-BIN signal, and this differentiation result is delivered to data processing module, if A/C/S request signal, data processing module sends relevant answer signal to signal processor according to this request signal, signal processor carries out encoding the response according to answer signal, again by coding after signal by transmitter module and upper, lower antenna sends.
Embodiment of the present invention, when by 1030MHz and/or the 1090MHz signal of upper antenna reception, by the first amplitude limiter, a 1030-1090MHz bandpass analog filter, the first low noise amplifier, the first power splitter, to be divided into two-way, a 1030MHz analog filter, a 1090MHz analog filter, a 1030MHz low noise amplifier, a 1090MHz low noise amplifier, the 1030MHz receiving and/or 1090MHz signal are processed; When by 1030MHz and/or the 1090MHz signal of lower antenna reception, by the second amplitude limiter, the 2nd 1030-1090MHz bandpass analog filter, the second low noise amplifier, the second power splitter, to be divided into two-way, the 2nd 1030MHz analog filter, the 2nd 1090MHz analog filter, the 2nd 1030MHz low noise amplifier, the 2nd 1090MHz low noise amplifier, the 1030MHz receiving and/or 1090MHz signal are processed.
Embodiment of the present invention becomes one by standard S pattern answering machine with two functions of 1090ESADS-B, make an equipment realize two functions, compact conformation, information all kinds of many, contain much information, integrated level is high, reduced the complexity that equipment is installed, simplify the master-plan of answering machine platform, saved cost.Another aspect of embodiment of the present invention, the present invention, not as traditional technology, needs first by Analogue mixer, radiofrequency signal to be converted to intermediate-freuqncy signal; But Direct Sampling radiofrequency signal builds digital quadrature device group and replaces analog down converter in signal processing module; Transmitter module does not convert intermediate-freuqncy signal to radiofrequency signal by Analogue mixer simultaneously, but directly export radiofrequency signal by the DA chip with DDS function or modulator, owing to simulating up/down frequency converter and interlock circuit without using, radio circuit is simple, digitized degree is high, reduce equipment power dissipation and weight, greatly improved reliability.
Refer to Fig. 2, Fig. 2 is the block diagram of S pattern answering machine second embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The S pattern answering machine of the Automatic dependent surveillance broadcast ability with 1090 megahertz expansion texts of the present embodiment is compared with the first embodiment, and its difference is: between the first low pass filter and a receipts/switch, increasing by the first circulator 20, between the second low passband and a receipts/switch, increasing by the second circulator 20 ＇.Separately, the transmitter module in the present embodiment is directly connected with the second circulator 20 ＇ with the first circulator 20.
The embodiment of the present invention, increases circulator as transmitting/receiving signal selector, and its advantage is not need high power switch and control signal thereof at a high speed.After circulator, the transmit-receive switch of receive path is mainly used in, when transmitting, receiving branch being disconnected to protection low noise amplifier and rear interlock circuit.This transmit-receive switch is input as low-power level signal, easily realizes.If further optimize receive path design, Rational choice back-end circuit running parameter, this transmit-receive switch also can.
Refer to Fig. 3, Fig. 3 is the block diagram of S pattern answering machine the 3rd embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The S pattern answering machine of the Automatic dependent surveillance broadcast ability with 1090 megahertz expansion texts of the present embodiment is compared with the first embodiment, and the antenna of the present embodiment adopts single antenna 300, the receive path that in receiver module, Jin You mono-tunnel is connected with this single antenna 300.Comprise:
The low pass filter 301 being connected with antenna 300, receive/the switch 302 being connected with low pass filter 301, open the amplitude limiter 303 that 302 passes are connected with receiving/send out, the 1030-1090MHz bandpass analog filter 304 being connected with amplitude limiter 303, be connected a low noise amplifier 305 with 1030-1090MHz bandpass analog filter 304, the power splitter 306 being connected with low noise amplifier 305, the 1030MHz analog filter 307 being connected with power splitter 306 and a 1090MHz analog filter 308, the 1030MHz low noise amplifier 309 being connected with 1090MHz analog filter 308 with 1030MHz analog filter 307 respectively and a 1090MHz low noise amplifier 310.
Refer to Fig. 4, Fig. 4 is the block diagram of S pattern answering machine the 4th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The present embodiment is compared with the 3rd embodiment, and its difference is: the present embodiment is connected with circulator 401 between antenna and a receipts/switch.
Refer to Fig. 5, Fig. 5 is the block diagram of S pattern answering machine the 5th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The present embodiment is compared with the first embodiment, the 1030MHz analog filter that the present embodiment receiver module do not comprise the first power splitter in the first embodiment, be connected with the first power splitter and 1090MHz analog filter, the 1030MHz low noise amplifier and the 1090MHz low noise amplifier that are connected with a 1090MHz analog filter with a 1030MHz analog filter respectively; And do not comprise the second amplifirer, the 2nd 1030MHz analog filter that is connected with the second power splitter and 1090MHz analog filter, the 2nd 1030MHz low noise amplifier and the 2nd 1090MHz low noise amplifier that are connected with the 2nd 1090MHz analog filter with the 2nd 1030MHz analog filter respectively.The A/D number of chips of while radio frequency sampling module 13 is compared the first embodiment and has been reduced two.The receiver module that is the present embodiment has saved two-way power splitter, two-way 1030MHz analog filter and two-way 1090MHz analog filter, the two paths of signals being received by upper and lower two slave antennas is respectively through first, the second low pass filter, first, second receives/sends out switch, first, the second amplitude limiter, first, the 2nd 1030-1090MHz band pass filter, first, after the second low noise amplifier, directly enter radio frequency sampling module 13 and carry out A/D sampling, further simplified receive path hardware circuit design, but complexity and technical difficulty that follow-up signal is processed have been increased.
Refer to Fig. 6, Fig. 6 is the block diagram of S pattern answering machine the 6th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The difference of the present embodiment and the 5th embodiment is: the receiver module of the present embodiment is having additional the first circulator and have additional the second circulator between a second receipts/switch and the second low pass filter between a first receipts/switch and the first low pass filter.
Refer to Fig. 7, Fig. 7 is the block diagram of signal processing module in S pattern answering machine the first embodiment, the second embodiment, the 3rd embodiment and the 4th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.Particularly, described signal processing module comprises: the digital quadrature transformation device group unit 70, what be connected with the digital quadrature transformation device group unit 70 carries out pretreated video pre-filtering unit 71 to signal, the A/C/S mode query signal decoding unit 72 that is connected with video pre-filtering unit 71 and 1030MHz signal is decoded and the 1090ESADS-BIN signal decoding unit 73 that 1090MHz signal is decoded, reply PPM/PCM coding unit 74 with the S pattern that described A/C/S mode query signal decoding unit 72 is connected, 1090ESADS-BOUT code signal coding unit 75, and reply with described S pattern the DA chip data dispensing unit 76 that PPM/PCM coding unit 74 is connected with 1090ESADS-BOUT code signal coding unit 75.Described A/C/S mode signal inquiry decoding unit 72 is also connected with data processing module with 1090ESADS-B IN signal decoding unit 73, for being sent to data processing module, processes decoded signal, described S pattern is replied PPM/PCM coding unit 74 and is also connected with data processing module with 1090ESADS-BOUT coding unit 75, for encoding with the corresponding answer signal of request signal or the signal that initiatively sends according to data module of sending according to data processing module.Wherein:
Described the digital quadrature transformation device group unit 70 is for to two-way 1030MHz numerical sequence signal X
1(n), X
2(n) with two-way 1090MHz numerical sequence signal X
3(n), X
4(n) carry out orthogonal transform processing, and the signal after processing is sent to video pre-filtering unit 71, described the digital quadrature transformation device group unit comprises digital band-pass filter unit 701 and digital quadrature device group 702.
Described video pre-filtering unit 71 completes pulse characteristics extraction, upper and lower day line options and ASK envelope demodulation operation, then according to envelope signal, complete the sequence of operations such as pattern discrimination, request signal decoding, 1090ESADS-BIN signal decoding, and relevant treatment result is uploaded to data processing module.Described video pre-filtering unit 71 comprises: signal characteristic abstraction unit 711, carries out pulse characteristics extraction for the signal to after quadrature transformer group cell processing; Up/down antenna selected cell 712, is 1030MHz signal for the signal when receiving, and up/down antenna reception is compared to output one road antenna selection signals to two paths of signals amplitude or the time of advent; ASK envelope demodulation unit 713, is connected with up/down antenna selected cell 712 with described signal characteristic abstraction unit, for receiving upper and lower antenna selected cell transmission Yi road signal, carries out demodulation; Also directly be connected with described signal characteristic abstraction unit 711, for the 1090MHz signal that signal characteristic abstraction unit 711 is sent, carry out demodulation.
Described A/C/S mode query signal decoding unit 72, comprises signal mode judgement unit 721, and it is S mode query signal or A/C mode query signal for the signal after ASK envelope demodulation being differentiated to distinguish described 1030MHZ signal; If 1030MHZ signal is S mode query signal, by the P of this S mode query signal
6pulse and each enable signal sequential are decoded and are processed with message analysis after adjusting together, wherein the P of S mode query signal
6pulse adopts DPSK modulation system, and processing procedure is first for P
6the message signals of pulse is carried out DPSK demodulation, and the 24 bit address information that wherein comprise are carried out to CRC check, if obtain through check, this address is consistent with the machine address to be notified S pattern to reply PPM/PCM coding unit 74 to encode and reply; If 1030MHz signal is A/C signal, notifies S pattern to promise PPM/PCM coding unit 74 to encode and reply.Described A/C/S decoding unit is also for decoded inquiry message is sent to data processing module, and described data processing module sends response message to described S pattern according to the inquiry message receiving and replys PPM/PCM coding unit 74.
Described S pattern is replied PPM/PCM coding unit 74 and is also connected with described data processing module, for the answer signal relevant to request signal sending according to data processing module, encode, described S pattern is replied PPM/PCM coding unit 74 and is comprised PPM coding unit 741 and pcm encoder unit 742, described PPM coding unit 741 is for encoding to the answer signal of S pattern, described pcm encoder unit 742 is for the answer signal of A/C pattern is encoded, and the signal after coding is sent to DA chip data dispensing unit 76.
Described 1090ESADS-BIN signal decoding unit 73 is connected with data processing module with the ASK envelope demodulation unit 713 of described video pre-filtering unit 71, for the 1090MHz signal to through after ASK envelope demodulation, carry out the processing such as preamble pulse detection, PPM demodulation, information extraction, and the signal after processing is sent to data processing module.
Described 1090ESADS-BOUT code signal coding unit 75, be connected with described data processing module, for receiving the relevant information of the aircraft that data processing module sends and carrying out PPM coding according to 1090ESADS-BOUT sequential, after coding, signal is sent to DA chip data dispensing unit 76.
Described DA chip data dispensing unit 76 is replied the signal after coding of PPM/ PCM coding unit 74 and 75 transmissions of 1090ESADS-BOUT code signal coding unit for receiving S pattern, and produce two-way I/Q orthogonal signalling, D/A chip configuration data-signal and reference clock signal according to the code signal receiving, according to above three kinds of signals, produce the 1090MHz radiofrequency signal with provisioning information, and the 1090MHz radiofrequency signal with provisioning information is sent to transmitter module by this, described transmitter module is launched by antenna.
Understandable, DA chip data dispensing unit 76 described herein is not essential feature of the present invention, and in other embodiment, this DA chip data dispensing unit 76 can also not be comprised in signal processing module.
Refer to Fig. 8, Fig. 8 is the block diagram of signal processing module in S pattern answering machine the 5th embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts and the 6th embodiment.Wherein, this signal processing module is only from the difference of signal processing module in first to fourth embodiment: the function treatment mode of the digital quadrature transformation device group unit is different, and it is all identical with the connected mode of other unit in signal processing module.The different reason of this digital quadrature transformation device group cell processing mode is because the change of the structure of receiver module; The digital quadrature transformation device group unit of the present embodiment aims at the receiver module of the 5th embodiment and the 6th embodiment and designs.
Particularly, described the digital quadrature transformation device group unit internal build multichannel 1030MHz and 1090MHz digital filter bank, to extract respectively 1030MHz request signal Serial No. X
1(n), X
2(n) with 1090ESADS-BIN signal digital sequence X
3(n), X
4(n), then build the digital quadrature transformation device group described numerical sequence signal is carried out to orthogonal transform processing, then result is sent into video pre-filtering unit.
Should be appreciated that the signal processing module in the present embodiment can also comprise DA chip data dispensing unit.
Refer to Fig. 9, Fig. 9 is the block diagram of S pattern answering machine transmitter module one embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.Described transmitter module is for launching A/C/S pattern answer signal or the 1090ESADS-BOUT signal of 1090MHz.Described transmitter module comprises:
High-speed d/a transducer 91 with DDS function, the pre-amplifier 92 being connected with high-speed d/a transducer 91, the 1090MHz analog filter 93 being connected with described pre-amplifier 92, the power amplifier 94 being connected with described 1090MHz analog filter 93 and the antenna selection switch 95 being connected with described power amplifier 94, described D/A converter 91 receives the I/Q orthogonal signalling that signal processing module chips data configuration unit produces, D/A chip configuration data-signal and reference clock signal, according to described signal, produce the 1090MHz radiofrequency signal process pre-amplifier 92 with specified signal, 1090MHz analog filter 93, power amplifier 94 is sent to antenna after carrying out filtering and amplifying processing, transmission with the 1090ESADS-BOUT code signal that carries out 1090MHz answer signal or data processing module is initiatively generated.Described antenna selection switch is used for selecting antenna or lower antenna to send answer signal or 1090ESADS-BOUT code signal.Described antenna selection switch is single-pole double-throw switch (SPDT).
Refer to Figure 10, figure is the block diagram of S pattern answering machine transmitter module one embodiment of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts.The transmitter module of present embodiment comprises:
Refer to Figure 11, Figure 11 is the S pattern answering machine radio frequency sampling of the present invention's Automatic dependent surveillance broadcast ability with 1090 megahertzes expansions texts and the theory diagram of the digital quadrature transformation device.The digital quadrature transformation device of this scheme is applicable to the S pattern answering machine of above-mentioned any embodiment.
Radio frequency Direct Sampling in this scheme is according to first-order bandpass sampling law, directly narrow radio frequency signal is sampled lower than the sampling rate of Nyquist (Nyquist) sampling thheorem.Rely on Band-pass Sampling Technology can use lower sample frequency, the feature of reflection radiofrequency signal, can greatly reduce the number of sampled point like this, reduced the requirement to A/D device, also reduced the processing load of follow-up unit, utilize the power of FPGA simultaneously, digital filter and digital quadrature mixing device are realized by FPGA, numerical sequence signal x (n) obtains digital orthogonal baseband signal I (n) and Q (n) after processing by quadrature mixing, low-pass filtering and D times of filtering extraction, then sends into feature extraction unit and carries out instantaneous amplitude a (n), instantaneous phase
with the calculating of instantaneous frequency f (n), finally these instantaneous features are transferred to the settling signal feature extraction of subsequent logic unit and demodulation together with two digital orthogonal baseband signal I (n) and Q (n).Its operation principle is as follows:
By
known (1) is located at f by digital controlled oscillator NCO frequency
0,
I
1(n), Q
1(n) after low pass filter, can obtain respectively:
In sum, the present invention has the following advantages:
One, the present invention becomes one standard S pattern answering machine and two functions of 1090ESADS-B, and an equipment has been realized two functions, compact conformation, information category is many, contain much information, and integrated level is high, has reduced equipment complexity is installed, simplify platform master-plan, saved cost.
Two, receiver module of the present invention is not transformed into intermediate-freuqncy signal by Analogue mixer by radiofrequency signal, but Direct Sampling radiofrequency signal builds digital quadrature device group and replaces analog down converter in FPGA; Transmitter module is not transformed into radiofrequency signal by Analogue mixer by intermediate-freuqncy signal simultaneously, but directly export radiofrequency signal by the DA chip with DDS function or modulator, owing to simulating up/down frequency converter and interlock circuit without using, radio circuit is simple, digitized degree is high, reduce equipment power dissipation and weight, greatly improved reliability.
Three, two functions of the present invention share aircraft up/down two slave antennas (Small General Aircraft also can be installed common antenna), compare with equipped standalone feature equipment, and required antenna amount reduces by half, and has reduced the design difficulty of airframe antenna layout, has facilitated the maintenance of antenna.
Four, the present invention can carry out antenna amount and circuit structure cutting according to the different demands of application platform, the requirement of the different application platforms such as, ground airborne to meet; By the continuous expansion of data processing software and upgrading are upgraded, can adapt to different ADS-B application; Also can adjust local circuit, expansion, with functions such as UATADS-B, DME of frequency range, is further expanded range of application of the present invention.
These are only embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts, it has the answering of A/C/S mode query and 1090ESADS-B function, comprising:
Antenna, for receiving 1030MHz and 1090MHz signal and sending 1090MHz signal;
Receiver module, is connected with antenna, for the 1030MHz receiving and 1090MHz signal being carried out to amplitude limit, impurity elimination ripple and amplification by antenna;
Radio frequency sampling module, is connected with receiver module, for the signal after receiver module is processed is sampled and is converted to digital signal;
Signal processing module, be connected with radio frequency sampling module, for the signal after radio frequency sampling module samples is identified and is decoded, to identify A/C/S request signal or the 1090ESADS-BIN signal that the signal receiving is 1030MHz, and decoded signal is sent to data processing module;
Described data processing module, be connected with signal processing module with the external equipment in aircraft and be connected, be used for receiving through decoded signal and to this decoded signal and process, wherein, the A/C/S request signal that the decoded signal receiving when data processing module is 1030MHz, sends the answer signal relevant to this A/C/S request signal to signal processing module; When the signal receiving is 1090ESADS-BIN signal, this signal is sent to external equipment to show this signal;
Described signal processing module, also encodes for the relevant answer signal that data processing module is sent and/or the data that send according to data processing module and initiatively generate 1090ESADS-BOUT code signal according to 1090ESADS-BOUT sequential; And
Transmitter module, for launching the signal after signal processing module coding.
2. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 1, is characterized in that: described antenna comprises heaven line and lower antenna.
3. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 1 or 2, is characterized in that, described receiver module comprises:
Receipts that be connected low pass filter with antenna, are connected with low pass filter/send out switch, with receive/amplitude limiter, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter that a switch is connected and the low noise amplifier being connected with 1030-1090MHz band pass filter; Or
Receipts that be connected low pass filter, the circulator being connected with antenna with antenna, are connected with circulator/send out switch, with the receive/amplitude limiter that a switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter, the low noise amplifier that is connected with 1030-1090MHz band pass filter; Or
Be connected low pass filter with antenna, the receipts that are connected with a low pass filter/switch, with the amplitude limiter that receipts/switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter and the low noise amplifier being connected with 1030-1090MHz band pass filter, the power splitter being connected with low noise amplifier, the 1030MHz analog filter being connected with power splitter and 1090MHz analog filter, the 1030 signal low noise amplifiers that are connected with 1090MHz analog filter with 1030MHz analog filter respectively and 1090 signal low noise amplifiers, or
Be connected low pass filter with antenna, be connected circulator with low pass filter, the receipts that are connected with a circulator/switch, with the amplitude limiter that receipts/switch is connected, the 1030-1090MHz bandpass analog filter being connected with amplitude limiter and the low noise amplifier being connected with 1030-1090MHz band pass filter, the power splitter being connected with low noise amplifier, the 1030MHz analog filter being connected with power splitter and 1090MHz analog filter, the 1030 signal low noise amplifiers that are connected with 1090MHz analog filter with 1030MHz analog filter respectively and 1090 signal low noise amplifiers.
4. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 3, is characterized in that, described signal processing module comprises:
The digital quadrature transformation device group unit, be connected and signal is carried out to pretreated video pre-filtering unit with described the digital quadrature transformation device group unit, the A/C/S mode query signal decoding unit that is connected with described video pre-filtering unit and 1030MHz signal is decoded and the 1090ES-ADS-BIN signal decoding unit that 1090MHz signal is decoded, reply PPM/PCM coding unit with the S pattern that described A/C/S mode query signal decoding unit is connected, the 1090ESADS-BOUT code signal coding unit being connected with data processing module, wherein, described A/C/S mode signal inquiry decoding unit is also connected with data processing module with 1090ESADS-BIN signal decoding unit, for being sent to data processing module, processes decoded signal, described S pattern is replied PPM/PCM coding unit and is also connected with data processing module, for encoding with the corresponding answer signal of request signal of sending according to data processing module, described 1090ESADS-BOUT code signal coding unit is also connected with data processing module, 1090ESADS-BOUT sequential and the information according to data module, initiatively sent are encoded, or
The digital quadrature transformation device group unit, the video pre-filtering unit being connected with described the digital quadrature transformation device group unit, the A/C/S mode query signal decoding unit and the 1090ES-ADS-BIN signal decoding unit that are connected with described video pre-filtering unit, reply PPM/PCM coding unit with the S pattern that described A/C/S mode query signal decoding unit is connected, the 1090ESADS-BOUT code signal coding unit being connected with data processing module, reply with S pattern the DA chip data dispensing unit that PPM/PCM coding unit is connected with 1090ESADS-BOUT code signal coding unit, described A/C/S mode signal inquiry decoding unit is also connected with data processing module with 1090ES-ADS-BIN signal decoding unit, for being sent to data processing module, processes decoded signal, described S pattern is replied PPM/PCM coding unit and is also connected with data processing module, for encoding with the corresponding answer signal of request signal of sending according to data processing module, described 1090ESADS-BOUT code signal coding unit is also connected with data processing module, for 1090ESADS-BOUT sequential and the information initiatively sent according to data processing module, encodes,
Wherein, described the digital quadrature transformation device group unit is to two-way 1030MHz numerical sequence signal X
1(n), X
2(n) with two-way 1090MHz numerical sequence signal X
3(n), X
4(n) carry out orthogonal transform processing, then result is sent into video pre-filtering unit; Or in internal build multichannel 1030MHz and 1090MHz digital filter bank, to extract respectively 1030MHz request signal Serial No. X
1(n), X
2(n) with 1090ESADS-BIN signal digital sequence X
3(n), X
4(n), then build the digital quadrature transformation device group described numerical sequence signal is carried out to orthogonal transform processing, then result is sent into video pre-filtering unit.
5. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 4, is characterized in that, described video pre-filtering unit comprises:
Signal characteristic abstraction unit, for the signal to after quadrature transformer group cell processing, carry out pulse characteristics extraction;
Up/down antenna selected cell, is 1030MHz signal for the signal when receiving, and up/down antenna reception is compared to output one antenna selection signals Yu Yi road, road ASK envelope demodulation signal to two paths of signals amplitude or the time of advent;
ASK envelope demodulation unit, is connected with up/down antenna selected cell with described signal characteristic abstraction unit, for receiving upper and lower antenna selected cell transmission Yi road signal, carries out demodulation; Also for the 1090MHz signal that signal characteristic abstraction unit is sent, carry out demodulation.
6. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertzes expansions texts as claimed in claim 5, it is characterized in that, described A/C/S mode query signal decoding unit is also connected with described data processing module, for decoded request signal is sent to data processing module; Described decoding unit comprises:
Signal mode judgement unit is S mode query signal or A/C mode query signal for the signal after ASK envelope demodulation being differentiated to described 1030MHZ signal;
If 1030MHZ signal is S mode query signal, by the P of this S mode query signal
6pulse and each enable signal sequential are decoded and are processed with message analysis after adjusting together, wherein the P of S mode query signal
6pulse adopts DPSK modulation system, and processing procedure is first for P
6the message signals of pulse is carried out DPSK demodulation, and the 24 bit address information that wherein comprise are carried out to CRC check, if obtain through check, this address is consistent with the machine address to be notified S pattern to reply PPM/PCM coding unit to encode and reply;
If 1030MHz signal is A/C signal, notifies S pattern to promise PPM/PCM coding unit to encode and reply.
7. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertzes expansions texts as claimed in claim 6, it is characterized in that, described S pattern is replied PPM/PCM coding unit and is also connected with data processing module, for the answer signal relevant to request signal sending according to data processing module, encode, S pattern is replied PPM/PCM coding unit and is comprised PPM coding unit and pcm encoder unit, and described PPM coding unit is for carrying out encoding the response to S mode query signal; Described pcm encoder unit is for carrying out encoding the response to A/C mode query signal.
8. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 7, is characterized in that, described transmitter module comprises:
High-speed d/a transducer with DDS function, the pre-amplifier being connected with high-speed d/a transducer, the 1090MHz analog filter being connected with described pre-amplifier, the power amplifier and the antenna selection switch that are connected with described analog filter, described D/A converter receives the I/Q orthogonal signalling that signal processing module produces, D/A chip configuration data-signal and reference clock signal, according to described signal, produce the 1090MHz radiofrequency signal process pre-amplifier with specified signal, 1090MHz filter, power amplifier is sent to antenna after processing, transmission with the 1090ESADS-BOUT code signal that carries out answer signal or data processing module is initiatively generated, or
Modulator, the pre-amplifier being connected with modulator, the 1090MHz analog filter being connected with pre-amplifier, the power amplifier being connected with analog filter and antenna selection switch, described modulator is modulated with the 1090MHZ carrier signal that modulation selects signal to provide frequency source according to the PPM of signal processing module output or pcm encoder answer signal, the radiofrequency signal with provisioning information after modulation is sent into pre-amplifier, 1090MHz filter, power amplifier is sent to antenna after processing, transmission with the 1090ESADS-BOUT code signal that carries out the transmission of answer signal or data processing module is initiatively generated,
Described antenna selection switch is used for selecting antenna or lower antenna to send answer signal or 1090ESADS-BOUT code signal.
9. the S pattern answering machine with the Automatic dependent surveillance broadcast ability of 1090 megahertz expansion texts as claimed in claim 1 or 2, is characterized in that: described antenna adopts omnidirectional antenna.
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