多小区STBC系统中基于自干扰抵消的鲁棒线性接收算法

Robust Linear Receiving Algorithm for STBC Systems in Multi-cell Environment

在多小区有未知共道干扰存在的STBC系统中,针对已有Capon类线性接收算法在有限样本情况下会造成STBC解码符号间自干扰的问题,该文提出了一种鲁棒的线性接收算法。该算法结合STBC的正交结构,首先通过正交投影的方法去除同一码字各符号间的自干扰,然后再利用Capon接收算法结构进行未知干扰的抑制。仿真结果表明,结合STBC正交结构和Capon接收结构的线性接收算法比传统的Capon接收算法有更好的干扰抑制性能。

For Space-Time Block Code （STBC） systems with unknown co-channel interference in multi-cell environment, focusing on the problem that the Capon-style receivers will result the self-interference in the STBC codeword from the finite samples, a robust linear receiver is proposed. Based on the orthogonal structure of the STBC, the self-interference in the STBC codeword is first canceled with the orthogonal projection. Then Capon receiver is used to suppress the unknown interference. Simulation results are presented to demonstrate the significant gain obtained by the proposed linear receivers over the conventional Capon receiver.