基于TCM的OFDM空时编码传输系统性能

Research on the OFDM Space Time Coding Combining Propagation Systems Based on TCM

在网格编码调制(TCM)技术的基本原理上,将OFDM和空时编码技术与之相结合,提出了一种新的TCM-OFDM-STBC联合传输系统。并在适合IEEE802.16标准的SUI3信道模型下,对此系统进行了仿真。仿真结果表明,这种改进的联合传输方案,可以极大地降低系统的误码率(BER),并在不增加系统带宽的前提下,取得较大的编码增益。

Based on the principle of Trellis Code Modulation（TCM, a new scheme of combining the OFDM and Space Time Coding scheme, a hybrid TCM - OFDM - STBC system,was proposed. By using the SUI - 3 channel model adaptable to the IEEE802.16 standard,the system was simulated. The result shows that the bit error rate （BER） can be greatly reduced by this improved hybrid scheme,and greater coding gain can be obtained without increasing the bandwidth of the system.