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Impact Of Beam Misalignment On Hybrid Beamforming Noma For Mmwave Communications, Mojtaba Ahmadi Almasi, Mojtaba Vaezi, Hani Mehrpouyan
Impact Of Beam Misalignment On Hybrid Beamforming Noma For Mmwave Communications, Mojtaba Ahmadi Almasi, Mojtaba Vaezi, Hani Mehrpouyan
Electrical and Computer Engineering Faculty Publications and Presentations
This paper analyzes the effect of beam misalignment on rate performance in downlink of hybrid beamforming-based non-orthogonal multiple access (HB-NOMA) systems. First an HB-NOMA framework is designed in multiuser millimeter wave (mmWave) communications. A sum-rate maximization problem is formulated for HB-NOMA, and an algorithm is introduced to design digital and analog precoders and efficient power allocation. Then, regarding perfectly aligned line-of-sight (LoS) channels, a lower bound for the achievable rate is derived. Next, when the users experience misaligned LoS or non-LoS (NLoS) channels, the impact of beam misalignment is evaluated. To this end, a misalignment factor is modeled and each …