Channel Estimation and Optimization for Cooperative Communication Systems Based on Distributed Space-frequency Coding
基于分布式空频码的协作通信系统的信道估计及优化

In this paper, the issue of channel estimation is investigated for distributed space-frequency coding system in cooperative communications. To make the channel being identifiable, Cyclic Convolution Filters (CCF) are utilized at the relay nodes. In the training stage, the suboptimal design is derived for both the pilot sequence and CCFs adopted at relay nodes. Furthermore, the closed expression of power allocation between source node and relay nodes is obtained. Finally, computer simulations demonstrate the effectiveness of the proposed approach.