摘要
时 -空分组码 (Space- Tim e Block Code)提供了一个有效的方法能完全利用发送分集和接收分集抗无线衰落。为了得到显著的编码增益 ,时 -空分组码必须和信道编码级联。本文提出了级联的 Tur-bo码和差分 M- PSK调制的时 -空分组码传输系统。描述了该系统实际上是一个串联的 turbo码结构并推导了 SISO(Soft Input Soft Output)迭代译码。计算机模拟结果表明 :在误码率为 10 - 4 ～ 10 - 5 时 4- DP-SK参与迭代和 4- DPSK不参与迭代相比可以获得 1d B的增益 ,而在误帧率为 10 - 4时 ,4- DPSK参与迭代获得的增益大于 1d B.
Space time block codes provide an effective way to fully exploit both transmit diversity and receive diversity to combat the impairments of wireless fading channel. To achieve a significant coding gain, space time block codes have to be concatenated with outer code. In this paper, we first propose a transmission system with space time block coded differential M PSK modulation concatenated turbo codes. We describe the proposed system which in fact is a serial turbo codes, and derive the iterative decoding by using SISO module. The simulated results show that 1dB coding gain is achieved in the iterative decoding with 4 PSK over the iterative decoding without 4 PSK at the bit error rate of 10 -4 ~10 -5 , and greater than 1dB coding gain at the frame error rate of 10 -4 .
出处
《桂林电子工业学院学报》
2000年第4期60-64,共5页
Journal of Guilin Institute of Electronic Technology
