基于重构信道的组分层空时系统接收天线选择

针对采用排序的串行干扰消除检测的组分层空时系统,提出了基于重构信道QR分解的接收天线选择算法,该算法用子信道Frobenius范数排序代替Moore-Penrose伪逆行范数排序得到置换矩阵,降低了计算复杂度.并给出了基于重构信道的快速算法,该算法比常规信道快速算法具有显著的性能提升.仿真分析表明,该算法在中断容量上与最大容量算法接近,重构信道QR分解算法与基于伪逆排序方法性能相近,重构快速算法性能稍有下降,但复杂度更低.

Receiving antenna selection algorithms based on equivalent channel for GLST systems

Based on QR decomposition(QRD) of the equivalent channel,a suboptimal receiving antenna selection is provided for group layered space-time(GLST) systems with ordered successive interference cancellation detectors.A permutation matrix can be obtained by sorting according to the Frobenius norms of subchannels instead of the norms of row vectors in the Moore-Penrose pseudo-inverse matrix,so that the computational complexity is reduced.And then,a fast algorithm based on the equivalent channel is provided.Simulation results show that the proposed algorithms can achieve near-optimal outage capacity,and the performance of the ORD-based algorithm is close to that of the pseudo-inverse-based algorithm.There is a slight performance gap between the provided algorithms,but the fast one with lower complexity.