协同分布式天线系统中低复杂度天线单元选择与自适应比特分配算法

Low Complexity Remote Radio Unit Selection and Adaptive Bit Partition Algorithm in Cooperative Distributed MIMO Systems

For multi-user cooperative Distributed MIMO (D-MIMO) systems, a low-complexity Remote Radio Unit (RRU) selection and adaptive bit partition algo-rithm is proposed to maximize the transmission Signal-to-Interference-Noise Ratio (SINR). Considering limited feedback, each user can adaptively select an RRU clus-ter to maintain the best communication quality. Under this condition, only one codebook is utilized for quanti-zing the Channel State Information (CSI) with variable dimensions, which effectively reduces the codebook storage amount. Furthermore, we propose an adaptive bit partition algorithm, which separately allocates bits to quantize the desired channels and interference channels. The optimal solution is achieved through an optimiza-tion theory to minimize the effect of inter-cell interfer-ence. Simulation results show that the proposed algo-rithm substantially improves the performance compared to other non-adaptive schemes.