Hybrid analog/digital precoding is a promising technology to cut down hardware cost in massive multi-input multi-output (MIMO) systems at millimeter wave frequencies. In this letter, we propose a joint beam selection scheme for analog domain precoding under discrete lens array. By considering channel correlation among users, the proposed scheme is able to avoid inter-user interference and maximize system sum rate. Moreover, a bio-inspired ant colony optimization-based algorithm is proposed to obtain a near-optimal solution with dramatically reduced computational complexity. Finally, simulations show the advantages of the proposed scheme in improving system sum rate.
@article{arxiv.1804.07181,
title = {Beam Selection for MmWave Massive MIMO Systems Under Hybrid Transceiver Architecture},
author = {Qiu Shuang and Luo Kai and Jiang Tao},
journal= {arXiv preprint arXiv:1804.07181},
year = {2018}
}