Hierarchical Codebook Design for Massive MIMO

Xin Su, Shichao Yu, Jie Zeng, Yujun Kuang
2015 EAI Endorsed Transactions on Scalable Information Systems  
The Research of Massive MIMO is an emerging area, since the more antennas the transmitters or receivers equipped with, the higher spectral efficiency and link reliability the system can provide. Due to the limited feedback channel, precoding and codebook design are important to exploit the performance of massive MIMO. To improve the precoding performance, we propose a novel hierarchical codebook with the Fourier-based perturbation matrices as the subcodebook and the Kerdock codebook as the main
more » ... odebook as the main codebook, which could reduce storage and search complexity due to the finite a lphabet. M oreover, t o f urther r educe t he search complexity and feedback overhead without noticeable performance degradation, we use an adaptive selection algorithm to decide whether to use the subcodebook. Simulation results show that the proposed codebook has remarkable performance gain compared to the conventional Kerdock codebook, without significant increase in feedback overhead and search complexity.
doi:10.4108/sis.2.4.e5 fatcat:mdbzlm6t6zfg3exzyuebs4vty4