CN104660375A - Multi-rate modulator-demodulator device based on burst communication - Google Patents
Multi-rate modulator-demodulator device based on burst communication Download PDFInfo
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- CN104660375A CN104660375A CN201510116177.2A CN201510116177A CN104660375A CN 104660375 A CN104660375 A CN 104660375A CN 201510116177 A CN201510116177 A CN 201510116177A CN 104660375 A CN104660375 A CN 104660375A
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Abstract
The invention discloses a multi-rate modulator-demodulator device based on burst communication and relates to a burst communication system in the meteoric trail communication field, and the timing synchronization of received signals can be realized. The multi-rate modulator-demodulator device comprises a modulator, a demodulator and a power supply; transmission information can be coded, decoded, modulated and demodulated by the device. The invention discloses two innovations, namely a multi-rate parallel demodulation technology and a fast timing synchronization technology. The device can reliably operate in the meteoric trail burst communication system by analyzing the innovations. According to the actual application, the device is proven to have a good practical effect.
Description
Technical field
The present invention relates to a kind of multi tate modem apparatus based on burst communication in the communications field, be specially adapted to burst communication system in meteoric trail communication field.
Background technology
Meteoric trail burst communication has random burst, rapid decay, duration short and weak feature, Burst Channel signal duration is mostly between 90ms to 1s, and traditional Meteor trail self-adapting variable-velocity burst modem frame structure design is unreasonable, the low rate frame duration is 70ms, and because the transmission of speed instruction is separate to transmit with the transmission of data, cause the transmission time long like this, low to the utilance of small-signal, cause system to reduce in the transmission performance of Burst Channel.
Summary of the invention
For adaptive system needs this modulator-demodulator mainly to have following innovative point: multi tate parallel demodulation technology and carrier auxiliary technology rapidly and efficiently.The invention enables communication equipment can set up communication link rapidly under the condition of meteoric trail burst communication and carry out data interaction, and the high reliability of guarantee information transmission.
The object of the present invention is achieved like this:
A kind of multi tate modem apparatus based on burst communication, comprise modulator 1 and demodulator 2, the input port 1 of modulator 1 receives external data, external data is carried out encode, add frame head and the process that is shaped generate modulation signal after export modulation signal by its output port 2; The input port 1 of demodulator 2 receives outside intermediate-freuqncy signal, and intermediate-freuqncy signal is carried out parallel demodulation, selects the demodulating data of correct speed, and exports the demodulating data after decoding by its output port 2 after demodulating data is carried out decoding.
Wherein, described modulator 1 comprises coding module 4, rate frame head module 5, base band shaping module 6 and frequency mixing module 7; Wherein the input port 1 of coding module 4 receives external data, the input port 1 of its output port 2 connection speed frame head module 5; The output port 2 of rate frame head module 5 connects the input port 1 of base band shaping module 6; The output port 2 of base band shaping module 6 connects the input port 1 of frequency mixing module 7; The output port 2 of frequency mixing module 7 exports modulation signal;
Coding module 4 exports rate frame head module 5 to after external data being encoded; Rate frame head module 5 presets different frame heads, according to adding frame head corresponding to respective rate before rate controlled signal data in encoded and exporting base band shaping module 6 to; The Frame that rate frame head module 5 exports by base band shaping module 6 carries out exporting frequency mixing module 7 to after base band shaping process forms base band shaping signal; Frequency mixing module 7 exports modulation signal by after base band shaping signal madulation to intermediate frequency.
Wherein, described demodulator 2 comprises down conversion module 8 signal data; The output port 2 of down conversion module 8 connects each input port 1 of first to N rate demodulation module 9-1 to 9-N respectively, each output port 2 of first to N rate demodulation module 9-1 to 9-N connects one to one respectively and selects the input port 1-1 to 1-N of demodulating data module 10, select the output port 2 of demodulating data module 10 to connect decoding module 11 input port 1, decoding module 11 output port 2 exports the demodulating data after decoding; Wherein, N be greater than 1 natural number;
Outside intermediate-freuqncy signal is down-converted to base band and forms baseband signal and export first respectively to N rate demodulation module 9-1 to 9-N by down conversion module 8; First to N rate demodulation module 9-1 to 9-N presets the frame head of different rates respectively and carries out different rates demodulation formation N road demodulating data respectively to baseband signal, each road demodulating data is mated with the default frame head of corresponding module, when the frame head of demodulating data is identical with default frame head, output speed frame head indicates and demodulating data, only demodulated output data when the frame head of demodulating data is not identical with default frame head; Demodulating data module 10 is selected to select correct demodulating data according to the instruction of speed frame head and export decoding module 11 to; Demodulating data is carried out decoding and exports the demodulating data after decoding by decoding module 11.
The present invention compares background technology and has the following advantages:
1, the present invention reduces volume and the weight of traditional modem greatly, has promoted meteoric trail communication equipment towards lightweight and miniaturization development.
2, multi tate parallel demodulation technology of the present invention, carrier auxiliary technology rapidly and efficiently make communication equipment can set up communication link rapidly under the condition of meteoric trail burst communication to carry out data interaction, and the high reliability of guarantee information transmission.
3, one aspect of the present invention low speed transmissions reduces the system average latency, and on the other hand, the error coding of high speed data transfer and high error correcting capability effectively can resist channel fading, obtains the further raising of system throughput.
Accompanying drawing explanation
Fig. 1 is that electric principle of the present invention divides block diagram;
Fig. 2 is that the present invention makes a start the electrical schematic diagram of modulator 1 embodiment;
Fig. 3 is the electrical schematic diagram of receiving end demodulator 2 embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described in detail.
With reference to Fig. 1, the present invention includes modulator 1, demodulator 2 and power supply 3, wherein the input port 1 of modulator 1 receives external data, and its output port 2 exports modulation signal; The input port 1 of demodulator 2 receives outside intermediate-freuqncy signal, and its output port 2 exports the demodulating data after decoding; + V the voltage end of power supply 3 respectively power port corresponding to each modular circuit connects.
With reference to Fig. 2, the present invention makes a start, and to comprise coding module 4, rate frame head module 5, base band shaping module 6 and frequency mixing module 7, Fig. 2 be that the present invention makes a start the electrical schematic diagram of modulator 1 to modulator 1, and embodiment presses Fig. 2 connection line; External data is encoded by coding module 4; Rate frame head module 5 presets different frame heads, and different frame heads represents different data rates, forms Frame according to adding frame head corresponding to respective rate before the rate controlled signal data in encoded that monitoring module exports; Frame is carried out base band shaping process and forms base band shaping signal by base band shaping module 6; Frequency mixing module 7 carries out radio-frequency transmissions by exporting A/D, up-conversion and power amplifier module after base band shaping signal madulation to intermediate frequency to.Each input port 20 pin of coding module 4, rate frame head module 5, base band shaping module 6 and frequency mixing module 7 is held with ground and connects, and each input port 21 pin and power supply 3+V voltage end also connect.Embodiment coding module 4, rate frame head module 5, base band shaping module 6 and frequency mixing module 7 adopt one piece of on-site programmable gate array FPGA production of integrated circuits.
With reference to Fig. 3, demodulator 2 of the present invention comprises the electrical schematic diagram that down conversion module 8, first is receiving end demodulator 2 of the present invention to N rate demodulation module 9, selection demodulating data module 10 and decoding module 11, Fig. 3, and embodiment presses Fig. 3 connection line; Outside intermediate-freuqncy signal is down-converted to base band and forms baseband signal by down conversion module 8; First to N rate demodulation module 9-1 to 9-N presets the frame head that represents different rates respectively and carries out different rates demodulation respectively to baseband signal and form N road demodulating data, each road demodulating data is mated respectively with the default frame head of corresponding module, when the frame head of demodulating data is identical with default frame head, output speed frame head indicates and demodulating data, only demodulated output data when the frame head of demodulating data is different from default frame head; Demodulating data module 10 is selected to select correct demodulating data according to the instruction of speed frame head; Demodulating data is carried out decoding by decoding module 11.Down conversion module 8, first is held to each input port 20 pin of N rate demodulation module 9-1 to 9-N, selection demodulating data module 10 and decoding module 11 with ground and connects, and each input port 21 pin and power supply 3 go out hold+V voltage end and connect.Embodiment down conversion module 8, first adopts one piece of on-site programmable gate array FPGA production of integrated circuits to N rate demodulation module 9-1 to 9-N, selection demodulating data module 10 and decoding module 11, shares one piece of on-site programmable gate array FPGA integrated circuit with modulator 1.
Power supply 3 of the present invention provides component working voltage at different levels, and embodiment adopts general integrated regulated power supply to make, and exporting+V voltage is+3.3V voltage.
The concise and to the point operation principle of the present invention is as follows: input data carry out encoding, adding different frame heads, base band shaping and Frequency mixing processing according to rate controlled signal to the data after coding by modulator 1, and settling signal is modulated.Receiving terminal by receive intermediate-freuqncy signal after down-conversion respectively after the rate demodulation module demodulation that N road is different, selecting a correct road demodulating data to carry out the demodulation that decoding completes information according to the instruction of speed frame head, exporting recovering the output port 2 of final code stream information by demodulator 2.
The present invention is integrated in that a block length is 200 millimeters, width dimensions is 80 millimeters, be highly in the printed board of 10 millimeters.
Claims (3)
1. the multi tate modem apparatus based on burst communication, it is characterized in that: comprise modulator (1) and demodulator (2), the input port 1 of modulator (1) receives external data, external data is carried out encode, add frame head and the process that is shaped generate modulation signal after export modulation signal by its output port 2; The input port 1 of demodulator (2) receives outside intermediate-freuqncy signal, and intermediate-freuqncy signal is carried out parallel demodulation, selects the demodulating data of correct speed, and exports the demodulating data after decoding by its output port 2 after demodulating data is carried out decoding.
2. a kind of multi tate modem apparatus based on burst communication according to claim 1, is characterized in that: described modulator (1) comprises coding module (4), rate frame head module (5), base band shaping module (6) and frequency mixing module (7); Wherein the input port 1 of coding module (4) receives external data, the input port 1 of its output port 2 connection speed frame head module (5); The output port 2 of rate frame head module (5) connects the input port 1 of base band shaping module (6); The output port 2 of base band shaping module (6) connects the input port 1 of frequency mixing module (7); The output port 2 of frequency mixing module (7) exports modulation signal;
Coding module (4) exports rate frame head module (5) to after external data being encoded; Rate frame head module (5) presets different frame head, according to adding frame head corresponding to respective rate before rate controlled signal data in encoded and exporting base band shaping module (6) to; The Frame that rate frame head module (5) exports carries out exporting frequency mixing module (7) to after base band shaping process forms base band shaping signal by base band shaping module (6); Frequency mixing module (7) exports modulation signal by after base band shaping signal madulation to intermediate frequency.
3. a kind of multi tate modem apparatus based on burst communication according to claim 1, is characterized in that: described demodulator (2) comprises down conversion module (8) signal data; The output port 2 of down conversion module (8) connects first respectively to each input port 1 of N rate demodulation module (9-1 to 9-N), first connects one to one respectively to each output port 2 of N rate demodulation module (9-1 to 9-N) selects the input port 1-1 to 1-N of demodulating data module (10), select the output port 2 of demodulating data module (10) to connect decoding module (11) input port 1, decoding module (11) output port 2 exports the demodulating data after decoding; Wherein, N be greater than 1 natural number;
Outside intermediate-freuqncy signal is down-converted to base band and forms baseband signal and export first respectively to N rate demodulation module (9-1 to 9-N) by down conversion module (8); First presets the frame head of different rates respectively to N rate demodulation module (9-1 to 9-N) and carries out different rates demodulation respectively to baseband signal and form N road demodulating data, each road demodulating data is mated with the default frame head of corresponding module, when the frame head of demodulating data is identical with default frame head, output speed frame head indicates and demodulating data, only demodulated output data when the frame head of demodulating data is not identical with default frame head; Demodulating data module (10) is selected to select correct demodulating data according to the instruction of speed frame head and export decoding module (11) to; Demodulating data is carried out decoding and exports the demodulating data after decoding by decoding module (11).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110490015A (en) * | 2019-06-28 | 2019-11-22 | 北京中电华大电子设计有限责任公司 | A kind of method of elevating ultrahigh baud rate (VHBR) communication compatibility |
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| CN101359993A (en) * | 2008-08-20 | 2009-02-04 | 中国电子科技集团公司第五十四研究所 | High-speed burst modem |
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