基于OFDM调制系统的协作分集  

The Cooperative Diversity-Based on the OFDM Modulative System

作　　者：陈祖爵[1] 黄福春[1] 

机构地区：[1]江苏大学计算机及通信工程学院,镇江212013

出　　处：《无线通信技术》2012年第4期15-19,共5页Wireless Communication Technology

摘　　要：将协作分集技术与正交频分复用(OFDM)技术相结合,研究了采用16QAM调制方式,基于OFDM系统的两种CRC和卷积码编码的协作通信。同时利用仿真分析了采用16QAM调制协作通信的两种解码转发与放大转发方案。也对比分析了CRC编码协作与卷积码编码协作的仿真性能,然后综合比较了DF、AF、CRC编码、卷积码编码协作通信的性能。仿真结果显示,基于CNV-OFDM的编码协作通信获得了显著的分集增益,系统性能得到了更大的提高。可见,CNV-OFDM的编码协作大大提高了无线通信系统的性能,降低了误码率。The cooperative diversity technology is combined with the orthogonal frequency division multiplexing(OFDM) technology,the study is made on 16QAM modulation mode,based on the OFDM systems of two kinds of CRC and convolution code coding of cooperative communications.Meanwhile,the simulations of the paper analyze two solutions of amplification forwarding and decoding forwarding communication with the 16QAM modulation.Also compare and analyze the simulative performance of the CRC coding cooperation and convolution code coding cooperation,then integrally compare the DF,AF,CRC coding,convolution code coding cooperative communication performance.Simulation results show that,the cooperative communication,based on the coding cooperation of Convolution-OFDM,gain remarkable diversity gains,the system performance get greatly improved.Visibly,the coding cooperation of Convolution-OFDM greatly improve the performance of the wireless communication system,and reduce the probability of BER.

关 键 词：OFDM CRC编码 OFDM系统 卷积码编码 协作通信 

分 类 号：TN92[电子电信—通信与信息系统]