CN207896993U - A kind of burst demodulating equipment suitable for the communication of helicopter gap - Google Patents
A kind of burst demodulating equipment suitable for the communication of helicopter gap Download PDFInfo
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- CN207896993U CN207896993U CN201820161653.1U CN201820161653U CN207896993U CN 207896993 U CN207896993 U CN 207896993U CN 201820161653 U CN201820161653 U CN 201820161653U CN 207896993 U CN207896993 U CN 207896993U
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Abstract
The utility model discloses a kind of burst demodulating equipment suitable for the communication of helicopter gap, which realizes the correct demodulation blocked to rotor with big frequency deviation burst.It using the utility model, may be implemented that the anti-rotor not available for Ordinary modems blocks and big frequency deviation burst is properly received function, be particularly adapted in the airborne modem of helicopter satellite communication.
Description
Technical field
The utility model is related to a kind of burst demodulation techniques, especially suitable for helicopter satellite communication system, that is, gap
Communication system.
Background technology
When ground and helicopter communicate, signal is blocked by lifting airscrew and the big frequency caused by Doppler
Partially, the correct demodulation of signal can be influenced, if using common burst demodulation technology, can not be learned in the circumstance of occlusion of rotor
In the case of, the realtime power of signal in demodulator can be caused to change greatly, and due to the presence of Doppler frequency shift, it can very big shadow
Ring the demodulation performance of signal.
Utility model content
Technical problem to be solved in the utility model is the deficiency present in helicopter communication for the solution prior art,
A kind of improved burst demodulating equipment on the basis of original technology is provided.
The purpose of this utility model is achieved in that a kind of burst demodulation dress suitable for the communication of helicopter gap
It sets, including delay unit 1, frequency offset correction unit 2, Master Control Unit 3, phase correction block 4 and decoding unit 5；The delay is single
The intermediate-freuqncy signal input of the intermediate-freuqncy signal input port of member 1, the intermediate-freuqncy signal input port of frequency offset correction unit 2 and Master Control Unit 3
Mouth is communicated with the outside；The frequency offset correction signal output of frequency offset correction unit 2 is communicated with the outside；The delay of delay unit 1 is believed
Number delivery outlet is connected with the time delayed signal input port of phase correction block 4；The first control signal delivery outlet of Master Control Unit 3 and
Two control signal outputs are connected with the control signal input of frequency offset correction unit 2 and phase correction block 4 respectively；Phase school
The phase correction signal delivery outlet of positive unit 4 is connected with the phase correction signal input port of decoding unit 5；Decoding unit 5 is translated
Code signal delivery outlet is communicated with the outside.
Wherein, frequency offset correction unit 2 includes the first matched filter 6, the first power control unit 7, the first timing unit
8, frequency estimation unit 9 and the first down-converter unit 10；The intermediate-freuqncy signal input port of first matched filter 6 is communicated with the outside,
Filtering signal delivery outlet is connected with the filtering signal input port of the first power control unit 7；The power of first power control unit 7
Adjustment signal output is connected with the power adjustment signal input port of the first timing unit 8, control signal input and master control list
The first control signal delivery outlet of member 3 is connected；The first sampled signal delivery outlet of timing unit 8 and adopting for frequency estimation unit 9
Sample signal output is connected, and control signal input is connected with the first control signal delivery outlet of Master Control Unit 3；Frequency Estimation list
The frequency-splitting signal output of member 9 is connected with the frequency-splitting signal input of the first down-converter unit 10；First down coversion
The frequency offset correction signal output of unit 10 is communicated with the outside, and controls the first control signal of signal input and Master Control Unit 3
Delivery outlet is connected.
Wherein, phase correction block 4 includes the second down-converter unit 11, the second matched filter 12, the second power control
Unit 13, the second timing unit 14, third down-converter unit 15 and carrier recovery unit 16；
The intermediate-freuqncy signal input port of second down-converter unit 11 is communicated with the outside, control signal input and Master Control Unit 3
Second control signal delivery outlet be connected, the frequency variation signal input port phase of frequency variation signal delivery outlet and the second matched filter 12
Even；The filtering signal delivery outlet of second matched filter 12 is connected with the filtering signal input port of the second power control unit 13；
The power adjustment signal input port phase of the power adjustment signal delivery outlet of second power control unit 13 and the second timing unit 14
Even, control signal input is connected with the second control signal delivery outlet of Master Control Unit 3；The sampled signal of second timing unit 14
Delivery outlet is connected with the sampled signal delivery outlet of third down-converter unit 15, control signal input and the second of Master Control Unit 3
Signal output is controlled to be connected；The frequency variation signal of the frequency variation signal delivery outlet and carrier recovery unit 16 of third down-converter unit 15
Input port is connected, and control signal input is connected with the second control signal delivery outlet of Master Control Unit 3；Carrier recovery unit 16
Phase correction signal delivery outlet is communicated with the outside, the feedback signal input port of feedback signal delivery outlet and third down-converter unit 15
It is connected.
Wherein, Master Control Unit 3 includes third matched filter 17, third power control unit 18, third timing unit
19, detecting signal unit 20 and flow control unit 21；
The intermediate-freuqncy signal input port of third matched filter 17 is communicated with the outside, filtering signal delivery outlet and third power control
The intermediate-freuqncy signal input port of unit 18 processed is connected；The power adjustment signal delivery outlet of third power control unit 18 and third timing
The power adjustment signal input port of unit 19 is connected；The sampled signal delivery outlet of third timing unit 19 and detecting signal unit 20
Sampled signal input port be connected；The detection signal output of detection unit 20 is inputted with the detection signal of flow control unit 21
Mouth is connected；The first control signal delivery outlet and second control signal delivery outlet of flow control unit 21 respectively with frequency offset correction list
Member 2 is connected with the control signal input of phase correction block 4 one-to-one correspondence.
The utility model has the following advantages that compared with the background art：
1 carries out operation using parallel two paths of signals, wherein the phase difference of correction form signals signal all the way, another way signal entangle
The frequency difference of positive link improves the utilization rate of burst frame, under the premise of the frame length that happens suddenly is certain, is obtained to the data of Frequency Estimation
Effective utilization；
2 in power control module, by the smooth of upper one whole frame signal power, to adjust the live signal work(of this frame
Rate, avoid leads to the mutation of demodulated signal realtime power since rotor blocks.
Description of the drawings
Fig. 1 is the utility model electrical schematic diagram.
Fig. 2 is the utility model frequency offset correction unit electrical schematic diagram.
Fig. 3 is the utility model phase correction block electrical schematic diagram.
Fig. 4 is the utility model Master Control Unit electrical schematic diagram.
Specific implementation mode
Specific explanations explanation is made to the utility model referring to figs. 1 to Fig. 4.
The utility model includes that delay unit 1, frequency offset correction unit 2, Master Control Unit 3, phase correction block 4 and decoding are single
Member 5.Fig. 1 is the principles of the present invention block diagram, and wherein delay unit 1 is that baseband signal is done delay process, frequency offset correction
Unit 2 is used for the frequency deviation of corrected link, and Master Control Unit 3 is the hinge of whole flow process, is mainly used to control the orderly of whole flow process
It carries out, phase correction block 4 is mainly used to correct the phase error of carrier wave, and decoding unit 5 mainly completes the work(of channel decoding
Energy.
The utility model frequency offset correction unit 2 is single by the first matched filter 6, first the 7, first timing of power control unit
Member 8, frequency estimation unit 9 and the first down-converter unit 10 composition, Fig. 2 is the utility model frequency offset correction unit electrical schematic diagram；
Wherein the first matched filter 6 use broadband filter, main function be to ensure that receive signal have maximum output noise
Than the first power control unit 7 is mainly completed to receive the power calculation of signal and adjustment function, and the first timing unit 8 is main complete
At the extraction of optimum sampling point, frequency estimation unit 9 mainly calculates the frequency-splitting for receiving signal, the first down-converter unit 10 master
Complete the effect of frequency conversion.
The utility model phase correction block 4 is mainly by the second down-converter unit 11, the second matched filter 12, the second work(
Rate control unit 13, the second timing unit 14, third down-converter unit 15 and carrier recovery unit 16 form.Schematic diagram such as Fig. 3
It is shown；Wherein the second down-converter unit 11 and third down-converter unit 15 mainly complete the effect of frequency conversion, the second matched filter
12 use narrow band filter, the second power control unit 13 mainly to complete the power calculation and adjustment function of signal, the second timing
Unit 14 mainly completes the extraction of optimum sampling point, and carrier recovery unit 16 mainly completes the calculating of carrier phase error.
The utility model Master Control Unit 3 is mainly by third matched filter 17, third power control unit 18, third timing
Unit 19, detecting signal unit 20 and flow control unit 21, composition.Schematic diagram is as shown in Figure 4；Wherein detecting signal unit 20
The main detection for completing burst, flow control unit 21 are mainly used to control down-converter unit, power control unit and determine
The startup and end of Shi Danyuan.
The brief operation principle of the utility model is as follows：
1, the roads A signal is mainly used to calculate the frequency deviation of link, and the roads A signal is entered frequency offset correction unit, specifically believes the roads A
Number by the first matched filter, the optimum reception of signal is completed, the signal that the first matched filter comes out enters the first power
Control unit completes the statistics to received signal power, and the signal after power adjustment enters the first timing unit, completes best sample
The extraction of point calculates the frequency-splitting of current time link subsequently into frequency estimation unit and the difference is placed in first
Down-converter unit completes the correction of link frequency difference；
2, signal dissipates matched filter, third power control unit, third timing unit to letter by egg in Master Control Unit
Number detection unit completes the detection to burst, and the stream of signal is completed according to the structure of the detection case of signal and burst frame
Process control, flow control unit mainly complete the down-converter unit to frequency offset correction unit, power control unit, timing unit and
The control of the down-converter unit starting and finish time of phase correction block；
3, the roads A signal is obtained into the roads B signal by delay unit, the phase error of the main corrected link of the roads B signal, specifically
The signal come out from the second down-converter unit enters the second matched filter, the optimum reception of signal is completed, subsequently into second
Power control unit enters back into the second timing unit, completes the extraction of Best Point, and the signal that the second timing unit comes out enters the
Three down-converter units enter back into the phase difference that carrier recovery unit calculates carrier wave；
4, the signal after carrier phase recovery is entered into decoding unit, completes demodulation function.
Claims (1)
1. a kind of burst demodulating equipment suitable for the communication of helicopter gap, including delay unit (1), frequency offset correction unit
(2), Master Control Unit (3), phase correction block (4) and decoding unit (5)；It is characterized in that, the intermediate-freuqncy signal of delay unit (1)
The intermediate-freuqncy signal input port of input port, the intermediate-freuqncy signal input port of frequency offset correction unit (2) and Master Control Unit (3) with outside
It is connected；The frequency offset correction signal output of frequency offset correction unit (2) is communicated with the outside；The time delayed signal of delay unit (1) exports
Mouth is connected with the time delayed signal input port of phase correction block (4)；The first control signal delivery outlet and second of Master Control Unit (3)
Control signal output is connected with the control signal input of frequency offset correction unit (2) and phase correction block (4) respectively；Phase
The phase correction signal delivery outlet of correction unit (4) is connected with the phase correction signal input port of decoding unit (5)；Decoding unit
(5) decoded signal delivery outlet is communicated with the outside；
The frequency offset correction unit (2) includes the first matched filter (6), the first power control unit (7), the first timing list
First (8), frequency estimation unit (9) and the first down-converter unit (10)；The intermediate-freuqncy signal input port of first matched filter (6) with
Outside is connected, and filtering signal delivery outlet is connected with the filtering signal input port of the first power control unit (7)；First power control
The power adjustment signal delivery outlet of unit (7) is connected with the power adjustment signal input port of the first timing unit (8), controls signal
Input port is connected with the first control signal delivery outlet of Master Control Unit (3)；The sampled signal delivery outlet of first timing unit (8) with
The sampled signal delivery outlet of frequency estimation unit (9) is connected, and controls the first control signal of signal input and Master Control Unit (3)
Delivery outlet is connected；The frequency-splitting of the frequency-splitting signal output and the first down-converter unit (10) of frequency estimation unit (9)
Signal input is connected；The frequency offset correction signal output of first down-converter unit (10) is communicated with the outside, control signal input
Mouth is connected with the first control signal delivery outlet of Master Control Unit (3)；
The phase correction block (4) includes the second down-converter unit (11), the second matched filter (12), the second power control
Unit (13), the second timing unit (14), third down-converter unit (15) and carrier recovery unit (16) processed；
The intermediate-freuqncy signal input port of second down-converter unit (11) is communicated with the outside, control signal input and Master Control Unit (3)
Second control signal delivery outlet be connected, the frequency variation signal input port phase of frequency variation signal delivery outlet and the second matched filter (12)
Even；The filtering signal input port phase of the filtering signal delivery outlet of second matched filter (12) and the second power control unit (13)
Even；The power adjustment signal delivery outlet of second power control unit (13) and the power adjustment signal of the second timing unit (14) are defeated
Entrance is connected, and control signal input is connected with the second control signal delivery outlet of Master Control Unit (3)；Second timing unit (14)
Sampled signal delivery outlet be connected with the sampled signal delivery outlet of third down-converter unit (15), control signal input and master control
The second control signal delivery outlet of unit (3) is connected；The frequency variation signal delivery outlet and carrier auxiliary of third down-converter unit (15)
The frequency variation signal input port of unit (16) is connected, and controls the second control signal delivery outlet of signal input and Master Control Unit (3)
It is connected；The phase correction signal delivery outlet of carrier recovery unit (16) is communicated with the outside, and becomes under feedback signal delivery outlet and third
The feedback signal input port of frequency unit (15) is connected；
The Master Control Unit (3) includes third matched filter (17), third power control unit (18), third timing unit
(19), detecting signal unit (20) and flow control unit (21)；
The intermediate-freuqncy signal input port of third matched filter (17) is communicated with the outside, filtering signal delivery outlet and third power control
The intermediate-freuqncy signal input port of unit (18) is connected；The power adjustment signal delivery outlet of third power control unit (18) is fixed with third
The power adjustment signal input port of Shi Danyuan (19) is connected；The sampled signal delivery outlet and signal detection of third timing unit (19)
The sampled signal input port of unit (20) is connected；The detection signal output of detection unit (20) and flow control unit (21)
Signal input is detected to be connected；The first control signal delivery outlet and second control signal delivery outlet of flow control unit (21) point
It is not connected with the control signal input of frequency offset correction unit (2) and phase correction block (4) one-to-one correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820161653.1U CN207896993U (en) | 2018-01-31 | 2018-01-31 | A kind of burst demodulating equipment suitable for the communication of helicopter gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820161653.1U CN207896993U (en) | 2018-01-31 | 2018-01-31 | A kind of burst demodulating equipment suitable for the communication of helicopter gap |
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| Publication Number | Publication Date |
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| CN207896993U true CN207896993U (en) | 2018-09-21 |
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| CN201820161653.1U Active CN207896993U (en) | 2018-01-31 | 2018-01-31 | A kind of burst demodulating equipment suitable for the communication of helicopter gap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095791A (en) * | 2019-05-28 | 2019-08-06 | 中国电子科技集团公司第五十四研究所 | A kind of multicarrier fsk modulated signal demodulation method |
| CN110943773A (en) * | 2019-11-26 | 2020-03-31 | 中国电子科技集团公司第五十四研究所 | Satellite broadcast demodulating equipment suitable for fixed wing aircraft platform |
-
2018
- 2018-01-31 CN CN201820161653.1U patent/CN207896993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095791A (en) * | 2019-05-28 | 2019-08-06 | 中国电子科技集团公司第五十四研究所 | A kind of multicarrier fsk modulated signal demodulation method |
| CN110943773A (en) * | 2019-11-26 | 2020-03-31 | 中国电子科技集团公司第五十四研究所 | Satellite broadcast demodulating equipment suitable for fixed wing aircraft platform |
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