摘要
车载导航定位数据经过有扰信道传输时,数据不可避免地会产生错误。本文采用(2,1,3)卷积码实现数据传输的纠错编码,利用DSP器件的移位和双字处理能力,快速有效地完成数据编码;在译码算法实现上,通过MATLAB仿真,确定Viterbi译码算法的最佳回溯深度,运用查表的方法,避免大量繁琐的计算,使得译码简洁迅速,并且译码器的实时性能良好。通过实际测试数据,验证了纠错编码的有效性。
Error correcting code is a reliability improving technology of digital transmission, in which the convolutional codes has been applied into all wireless communication standard because of its superior performance and the＇optimum＇ Viterbi decoding algorithm. According to this feature, TMS,320VC5402 is adopted to be the hardware platform to achieve convolutional coding and Viterbi decoding, and applied into vehicle navigation and positioning data transmission, the experimental results show the reliability of the system.
出处
《电子测量技术》
2009年第9期49-51,59,共4页
Electronic Measurement Technology
关键词
卷积编码
VITERBI译码
导航定位
数据传输
convolutional codes
viterbi decoding
navigation and positioning
data transmission
