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Integral demodulation method of MF-TDMA non-uniform multi-carriers

A technology of MF-TDMA and demodulation method, which is applied in the field of overall demodulation of MF-TDMA non-uniform multi-carriers, can solve problems such as poor adaptability, and achieve the effect of strong processing capacity, large number of processing channels, and low implementation complexity

Active Publication Date: 2016-05-04
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0002] The overall demodulation method based on uniform channel splitting based on polyphase filter banks can only realize the overall demodulation of multiple uniform TDMA signals with the same symbol rate and the same interval, and the application has great limitations. For some TDMA system applications Poor adaptability to occasions

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] figure 1 It is a block diagram of the electrical principle of the overall demodulation of non-uniform multi-carriers in the embodiment of the present invention, which includes modules of non-uniform channel branching, serial output, overall demodulation and parameter control. The non-uniform channel splitting module includes two parts: analysis and synthesis. The analysis part includes analysis filter and N-point IFFT module, and the synthesis part includes synthesis FFT processing and synthesis filter module. The overall demodulation includes modules such as matched filtering, burst capture, timing synchronization, carrier recovery, and decoding.

[0025] A kind of overall demodulation method of MF-TDMA non-uniform multi-carrier, comprises steps:

[0026] ①The sampling data of MF-TDMA non-uniform multi-carrier first enters t...

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Abstract

The invention discloses an integral demodulation method of MF-TDMA non-uniform multi-carriers, and relates to related technologies such as filtering, extraction, digital reconstruction, and modulation and demodulation of digital signal processing in a communication field. Different from an integral demodulation method of uniform channel branches based on a multi-phase filter group, the non-uniform channelization technology based on a total reconstruction modulation filter group is adopted, and flexible reconstruction and integral demodulation of non-uniform TDMA signals with multi-path different symbol rates at any frequency point can be realized in a certain bandwidth by means of processing of an analysis filter, a comprehensive filter and the like. According to the invention, the integral demodulation of the non-uniform multi-path TDMA signals in an FPGA is realized, the number of processing paths is larger, the realization complexity is low, and the cost of a central station demodulator is lowered; in addition, when the method is applied to a central station of a large-capacity TDMA satellite communication system, the system is more flexible in networking processing mode, is higher in processing capability and is compatible with a uniform multi-carrier integral demodulation function.

Description

technical field [0001] This invention relates to an overall demodulation method of MF-TDMA non-uniform multi-carriers in the field of communication, which can realize the overall demodulation of non-uniform multi-channel TDMA signals in FPGA, and has the advantages of large number of processing channels and low implementation complexity. The advantages of reducing the cost of the central station demodulator, etc., are applied to the central station of the large-capacity TDMA satellite communication system at the same time, which can make the system processing and networking mode more flexible, the processing capacity is stronger, and it is compatible with the function of uniform multi-carrier overall demodulation. Background technique [0002] The overall demodulation method based on uniform channel splitting based on polyphase filter banks can only realize the overall demodulation of multiple uniform TDMA signals with the same symbol rate and the same interval, and the appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/0202H04L27/2602H04L27/2627
Inventor 岳田李辉张春晖张鹏宗杨慧博张方明黄先超宋腾辉王维猛张永飞
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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