基于动态天线分组的Alamouti编码/V-BLAST合并算法

Combining Alamouti coding with V-BLAST through dynamic antenna grouping

将Alamouti编码与V-BLAST结合在一个MIMO系统中可以同时获得空间分集和复用技术的优点。基于最优检测排序信息,新算法在不增加接收机计算复杂度的情况下构造一定数量的反馈信息,并据此将发射天线动态地分为两组:最弱两根天线为一组并传送Alamouti编码信号,剩余天线为一组并按V-BLAST结构发射信号。通过改善接收机第一检测级的BER性能并抑制误差传播效应,新算法可以获得比具有相同频谱效率的V-BLAST算法更好的BER性能,而且可以应用在发射天线数大于接收天线数的系统中。

V-BLAST is combined with Alamouti coding in MIMO systems to take advantages of both spatial diversity and multiplexing techniques. Based on the optimal detection ordering information generated in the conventional V-BLAST systems, several bits feedback information was built without any additional computational complexity and then the transmit antennas are dynamically divided into two groups： the two weakest antennas are grouped for Alamouti coding and the rest antennas operates as V-BLAST. Through dramatically improving the BER performance of the first detection stage and suppressing the error propagation effect, the proposed algorithm achieves better BER performance over V-BLAST with same spectral efficiency, and it can be applied in the MIMO systems in which the number of transmit antennas is more than that of the receive antennas.