Space-Time Coding for Two-Transmitter and Two-Receiver Cooperation
The single antenna user nodes at the transmitters and receivers share their antennas to form a virtual multiple antenna system and to realize the cooperative diversity. So it can enlarge the systems capacity and enhance the service quality of the ad hoc network and improve the systems performance. Applying the orthogonal property of the space-time coding, we transform the vector signal jointly maximum likelihood (ML) decoding into single symbol decoding, and we provide the single symbol decoding methods for the situations in decode and forward mode (DF) and in amplify and forward mode (AF) separately. After smoothing the noise influence, we can improve the systems performance. Simulation demonstrates that the application of users cooperation diversity can effetely improve the systems performance. And given the total power, suitably adjust the target signal power and cooperative signal power, the performance in AF mode approaches that in DF mode. So, the space-time coding in AF mode is a good choice.
cooperation space-time coding AF DF diversity
Qinghua Ma Chongxian Zhong Luxi Yang
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
国际会议
首届无线通信跨层设计国际学术研讨会(1st International Workshop on Cross Layer Design)
济南
英文
1-4
2007-09-20（万方平台首次上网日期，不代表论文的发表时间）