编码协作通信的码字选择

Code design for coded cooperative communication

用户编码协作通信能提供很好的空间分集增益,克服信号在在无线网络中传输遭受的衰落。基于正交频分复用OFDM系统实现编码协作通信。在协作通信过程中,由于伙伴在用户间信道侦听到的信息受到噪声和衰落特性的干扰,所以用于协作通信的码字需经过合理选择、设计以提供最优的性能。基于重新编码和打孔卷积编码两种信道编码方法分析了用于编码协作通信的码字设计方法,并给出了编码协作通信的误帧率FEP仿真性能。

User cooperative communication can provide special diversity gains through two or more terminals transmitting jointly as a virtual antenna array for wireless networks. As a result,it can overcome signal fading in wireless communication. In this paper,coded cooperative communication is discussed base on Orthogonal Frequency Division Multiplexing （OFDM） system. In a cooperative network,the partner overhears a noisy version form inter-user channel, so code used in cooperation should be carefully designed to offer optimized performance. Code design criteria are discussed for two methods of coded cooperation,re-encoding and punctured convolutional codes,and the FEP （frame error probability）simulation performance is given.