基于相位旋转的坐标交织分布式空时码

两天线的中继网络中，坐标交织分布式空时码(CIDSTC)的设计未考虑到信道状态信息(CSI)。针对此问题，该文提出了一种基于相位旋转的坐标交织分布式空时码(PR-CIDSTC)，中继节点将其发送信号旋转适当的角度，该角度由接收端根据CSI以最小化成对差错概率(PEP)为目标而设计并反馈到发送端。仿真结果显示，误码率(BER)为10-5时，PR-CIDSTC只需2 bit的反馈量就获得了1.5 dB的增益。

Co-ordinate Interleaved Distributed Space-time Code Based on Phase Rotation

The Channel State Information (CSI) is not taken into consideration in Co-ordinate Interleaved Distributed Space-Time Code (CIDSTC) for two-antenna-relays networks. For this issue, CIDSTC based on Phase Rotation (PR-CIDSTC) is proposed, in which relays rotate their transmitted signals with certain angles. Since these angles are designed to minimize Pair Error Probability (PEP), the performance is enhanced. Simulation demonstrates that the proposed scheme provides a 1.5 dB gain at Bit Error Rate (BER) of10-5 over PR-CIDSTC with only 2 bit feedback amount.