2017/08/14 by Rakesh RT, RT, Rakesh, Debarati Sen +3
Engineering · #Advanced MIMO Systems Optimization #FOS: Computer and information sciences #Information Theory (cs.IT) #Microwave Engineering and Waveguides #Millimeter-Wave Propagation and Modeling
paper · pdf · doi:10.48550/arxiv.1708.04257
openalex publication_date 2017/08/14 · openalex created_date 2022/12/25 · openalex updated_date 2026/07/28
Beamforming is an indispensable feature for millimeter wave (mmWave) wireless\ncommunications in order to compensate for the severe path loss incurred due to\nhigh frequency operation. In this paper, we introduce a novel framework to\nevaluate the spectral efficiency (SE) of non-line-of-sight(NLOS) mmWave links\nwith optimal analog beamforming. Optimality here implies the joint selection of\nantenna beams at the transmitter and receiver which simultaneously maximize the\nreceived power. We develop a mathematical framework based on the extended\nSaleh-Valenzuela channel model to embody the impact of optimal analog\nbeamforming into the performance metrics for NLOS mmWave links. Practical\nmmWave channels are characterized by sparsity in terms of number of multi-path\ncomponents; we exploit this feature to derive upper and lower bounds on SE of\nbeamformed directional links. Simulation results reveal that the proposed\napproach is fairly accurate to model beamformed links in most practical\noperating scenarios. We also study the impact of overhead due to antenna beam\ntraining on the throughput (TP) of a link and obtain an approximate solution\nfor optimal antenna half power beamwidth which maximizes TP.\n