摘要
基于CCSDS标准中卷积码编码规范,提出并实现一种CCSDS卷积码快速识别算法。算法采用卷积码的校验矩阵对CCSDS标准中五种未知码率的卷积码进行遍历,从而完成删除模式和起始位置识别。该算法具有计算复杂度低、容错性好、易于实现的优点,而且克服了截获码序列起始位置模糊的问题。仿真实验表明,该算法在截获序列足够长且误比特率低于10-2时可以达到95%以上的识别正确率。
This paper presents and implements a fast recognition algorithm for CCSDS convolutional codes based on the CCSDS convolutional code specification.The algorithm traverses the five code-rate-unknown convolutional codes in CCSDS specification by its parity matrix so that it can complete the identification of punctured modes and start position.This algorithm has low complication and good fault tolerance,it is easy to carry out,and it overcomes the problem of start position ambiguity of the captured sequence.The simulation results show that this algorithm can reach 95% or higher right recognition rate when the captured sequence has enough length and the bit error rate is lower than 10-2.
出处
《遥测遥控》
2013年第3期53-57,67,共6页
Journal of Telemetry,Tracking and Command
关键词
CCSDS
删除卷积码
快速识别算法
CCSDS
Punctured convolutional codes
Fast recognition algorithm
