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Viterbi decoding method applied to maritime satellite telephone

A technology of satellite phone and decoding method, which is applied in the field of channel decoding, can solve problems such as long decoding delay, speed up decoding speed, reduce calculation amount, etc., achieve decoding time delay and error correction performance satisfaction, and speed up decoding speed , the effect of saving storage space

Inactive Publication Date: 2015-05-13
CHENGDUSCEON TECH
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Problems solved by technology

[0027] The present invention provides a Viterbi decoding method applied to maritime satellite telephones, which solves the problem that the Viterbi decoding algorithm of maritime satellite telephones in the prior art needs a large amount of storage when the sending sequence is long, and also makes The technical problem that the decoding delay is too long and cannot meet the requirements of real-time communication realizes that the Viterbi decoding algorithm applied to maritime satellite phones requires a small amount of storage, saves storage space, reduces the amount of calculation, and speeds up decoding Speed, and the whole decoding delay and error correction performance meet the technical effect of maritime satellite telephone communication requirements

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  • Viterbi decoding method applied to maritime satellite telephone
  • Viterbi decoding method applied to maritime satellite telephone
  • Viterbi decoding method applied to maritime satellite telephone

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Embodiment 1

[0058] In Embodiment 1, a Viterbi decoding method applied to maritime satellite telephones is provided for decoding (n, k, v) type convolutional codes, wherein k is input, n is output, and v level register, please refer to the Figure 1-Figure 2 , the method includes:

[0059] Step A: Initialize the channel decoding, select the number of effective storage units M, M=2 k*(v-1) ;

[0060] Step B: Perform channel decoding iterative operation;

[0061] Step C: Perform channel decoding path backtracking length selection and decoding output.

[0062] Wherein, in the embodiment of the present application, the step A: initialize the channel decoding, select the number of effective storage units M, M=2 k*(v-1) , including:

[0063] Step A1: Convert all surviving paths to their one-to-one corresponding values, and set the values ​​corresponding to all surviving paths to be 0, 1, 2, 3...2 k*(v-1) ;

[0064] Step A2: Map the coded polynomial to an integer value v_code, and record t...

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Abstract

The invention discloses a viterbi decoding method applied to a maritime satellite telephone. The method is used for decoding (n, k and v) recurrent codes and includes the steps: A initializing channel decoding and selecting an effective storage unit number M; B performing iterative channel decoding operation; C selecting the back tracking length of a channel decoding path and outputting decoding. The method has the advantages that a viterbi decoding algorithm applied to the maritime satellite telephone needs low storage capacity, storage space is saved, calculation capacity is decreased, decoding is accelerated, and the whole decoding delay and error-correcting performance meets the requirement of maritime satellite telephone communication.

Description

technical field [0001] The invention relates to the technical field of channel decoding in communication digital signal processing, in particular to a Viterbi decoding method applied to maritime satellite telephones. Background technique [0002] The existing common convolutional decoder is a Viterbi decoder, and the Viterbi decoder is a probability decoder. The principle is to compare the received sequence with all possible transmitted sequences, and select the transmitted sequence with the smallest distance from the received sequence as the decoding output. [0003] The best Viterbi decoding performance is to find the best path as the decoding result after the entire frame, that is, after all the information is received, but when the transmission sequence is long, the required storage capacity is large, and it also makes the decoding The delay is too long to meet the requirements of real-time communication. Therefore, the actual implementation of Viterbi decoding usually...

Claims

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Application Information

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IPC IPC(8): H03M13/23
Inventor 王晓洪谢永锋吴仡王小沙严国荣佟力
Owner CHENGDUSCEON TECH
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