基于不同信道状态信息的MIMO中继系统收发信机设计

该文研究了在中继站已知完全信道信息或统计信道信息情况下的多输入多输出(MIMO)中继系统收发信机设计的问题。中继站利用获得的信道状态信息对接收信号进行滤波转发，接收节点采用线性最小均方误差接收机(MMSE)恢复出原始信号。仿真结果表明，所提中继转发策略性能优于传统的放大转发。在高信噪比条件下，基于部分信道状态信息反馈的设计方案可以获得与完全信道状态信息反馈接近的性能。

Linear Transceiver Design in MIMO Relay Systems with Different Channel State Information

The design of transceivers in relaying systems is studied with full Channel State Information (CSI) or partial CSI at the relay. Based on the acquired CSI,the relay filters and retransmits its received signals and the destination recovers the original signals with linear Minimum Mean Square Error (MMSE) receiver. Simulation results show that the proposed relaying scheme is prior to the traditional Amplify-and-Forward (AF) relaying. At high Signal to Noise Ratio (SNR), the scheme based on partial CSI feedback behaves closely to that based on full CSI feedback.