Research on concatenated trellis-coded modulation system combined with space-time coding over frequency selective fading channel

频率选择性衰落信道上结合空时编码的级联网格编码调制系统研究

基本信息

批准号：
15560321
负责人：
OGIWARA Haruo
金额：
$ 2.24万
依托单位：
Nagaoka University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

1.Transmission DiversityThe transmit diversity system proposed by Lindskog, which is an extension of the diversity system proposed by Alamouti, has been extended for frequency selective fading channel. This research has studied combinations of the Lindskog system with parallel or serial concatenated trellis-coded modulation.Though the Lindskog system can separate signals from two transmit antennas, inter-symbol interference remains for frequency selective fading channel. When higher transmission speed is necessary, the inter-symbol interference happens over more symbols. Decision aided equalization has been adopted as it require practical amount of signal processing task even for such circumstance. Computer simulation results has shown that the system combined with parallel concatenated trellis-coded modulation realizes 6dB diversity gain by using two transmit antenna and 3.5dB coding gain at the bit error rate (BER)10^<-2>. It has also shown that the system combined with serial concatenated trellis-coded modulation realizes 4.5dB diversity gain and 10.5dB coding gain at BER=10^<-4>.2.Hardware design of concatenated trellis-coded modulationIn 2003, a hardware decoder for the concatenated trellis-coded modulation has been designed for 8-PSK modulation.In 2004 a hardware decoder which can be adopted for higher order modulation and requires less amount of signal processing task has been proposed and implemented on a field programmable gate array (FPGA).3.Optimization of codingOptimum code has been searched under the assumption of many diversity paths by using theoretically derived upper bounds of BER.

1.传播多样性Lindskog提出的传输多样性系统，这是Alamouti提出的多样性系统的扩展，已扩展到频率选择性褪色通道。这项研究研究了Lindskog系统与平行或连续串联的格子编码调制的组合。尽管Lindskog系统可以将信号与两个传输天线分开，但隔膜间干扰仍然是频率选择性褪色通道的遗物。当需要更高的传输速度时，符号间干扰会发生在更多符号上。决策辅助均衡已被采用，因为它即使在这种情况下也需要实用的信号处理任务。计算机仿真结果表明，该系统与平行串联的格子编码的调制结合使用，通过使用两个发射天线和3.5dB编码增益以位错误率（BER）10^<-2>实现6DB多样性增益。它还表明，该系统与串行串联的格子编码调节结合了4.5db的多样性增益和10.5dB的编码增益= 10^<-4> .2。串联的Trellis-编码调制的HARDWARE设计2003年2003年的硬件解码器，用于连接的trellis编码的调制器，用于8-PEDERS ADULUCTION ADEDER ADY ADULUCTION ADEDER。对于高阶调制，需要更少的信号处理任务，并在现场可编程门阵列（FPGA）上实现了。3。在使用理论派生的BER上限的假设下，在许多多样性路径的假设下搜索了编码至最小代码的优化。