论文部分内容阅读
本文提出了适合于卷积码的两种新的交错方案,即块交错方案与位交错方案 并在实现了卷积码的编码、Viterbi译码的基础上,对采用这两种交错方案的(2,1,3)卷积码在Rayleigh衰落信道中的纠错性能进行了计算机模拟,且与周期交错方案的结果做了比较。模拟结果表明:周期交错方案不适合于卷积码,而采用块交错与位交错方案的(2,1,3)卷积码的纠错性能改善十分明显,可达2—4个量级。
In this paper, we propose two new interleaving schemes that are suitable for convolutional codes, that is, the block interleaving scheme and the bit interleaving scheme. On the basis of implementing the convolutional coding and Viterbi decoding, 2, 1, 3) convolutional codes in Rayleigh fading channel were simulated by computer and compared with the results of the periodic interleaving scheme. The simulation results show that the periodic interleaving scheme is not suitable for convolutional codes, while the error correction performance of (2,1,3) convolutional codes with block interleaving and bit interleaving schemes is obviously improved to 2-4 orders of magnitude.