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Interference resisting method combining Reed-Solomon code with grid coding modulation technique

A trellis-coded modulation and technology technology, applied in digital transmission systems, electrical components, error prevention and other directions, can solve problems such as the limitation of error correction capability and the failure to achieve a better probability of successful reception, to enhance error correction capability, solve The contradictory effect of channel coding efficiency and communication reliability

Inactive Publication Date: 2009-04-01
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

[0003] Channel error correction coding can effectively correct the errors introduced by interference in the frequency hopping transmission system, but the existing anti-interference methods are mostly suitable for combating white Gaussian noise. For sudden man-made interference, its error correction ability is limited to a certain extent. Often does not achieve a good probability of successful acceptance

Method used

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  • Interference resisting method combining Reed-Solomon code with grid coding modulation technique
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  • Interference resisting method combining Reed-Solomon code with grid coding modulation technique

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Embodiment Construction

[0037] RS codes are a class of multi-ary Bose, Chaudhuri and Hocquenghem (BCH) codes with strong error correction capabilities. TCM is a technology that combines coding and modulation.

[0038] The anti-jamming method that RS code combines TCM technology comprises the following steps:

[0039] 1) Get the source data from the data source;

[0040] 2) Encode the source data through the RS product encoder and the TCM encoder at the sending end;

[0041] 3) Modulating the coded data into a PSK signal;

[0042] 4) Sending I and Q modulation signals of PSK on the communication channel;

[0043] 5) Receive the sent signal and perform Viterbi decoding, TCM re-encoding and comparison and judgment on the received I and Q signals;

[0044] 6) Send the Viterbi decoded data and decision information to the RS decoder for decoding, thereby recovering the sent source data.

[0045] The source data is encoded through the RS product encoder and the TCM encoder at the sending end:

[0046]...

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Abstract

The invention discloses an anti-interference method combining the Reed-Solomon (RS) code with the Trellis Coded Modulation (TCM) technique. The method comprises the following steps: (1) obtaining source data from a data source; (2) encoding the source data by an RS product encoder and a TCM encoder at a transmitting end; (3) Modulating the encoded data into a Phase Shift Keying (PSK) signal; (4) transmitting two modulation signals including an isodirectional component (I) and a quadrature component (Q) of the PSK on a communication channel; (5) receiving the transmitted signals, and carrying out Viterbi decoding, TCM recoding and comparative decision on the two signals including the I and the Q; and (6) transmitting the Viterbi decoding data and the decision information to the RS decoder for decoding, and recovering the transmitted source data. In a frequency hopping transmission system, the method better distinguishes random bit interference and burst hopping interference, improves the system error correction capability, and solves the conflict between the channel encoding efficiency and the communication reliability of the frequency hopping transmission system.

Description

technical field [0001] The invention relates to the field of digital communication, and more specifically relates to an anti-interference method of Reed-Solomon code combined with trellis coding modulation technology. Background technique [0002] Frequency hopping is a type of spread spectrum communication system, which has good anti-interference performance and has been widely used in the field of military communication. The working principle of frequency hopping is to use a pseudo-code sequence to form a frequency hopping pattern to control the carrier frequency at each moment, so that it can quickly hop in a set of fixed number of predefined frequency points, so as to avoid interference and achieve reliable signal transmission the goal of. In the process of frequency hopping communication, in addition to being affected by Gaussian white noise (AWGN), it will be more affected by man-made jamming signals, especially in the special environment of battlefield communication....

Claims

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Application Information

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IPC IPC(8): H04L1/00H04B1/69H04B1/715
Inventor 杨丽萍赵民建王志雄王培雅
Owner ZHEJIANG UNIV
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