Low-Complexity Beam Selection via Beam Range Biasing for Beamspace MIMO Systems
IEEE Wireless Communications Letters, cilt.15, ss.2030-2034, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/lwc.2026.3669183
- Dergi Adı: IEEE Wireless Communications Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Sayfa Sayıları: ss.2030-2034
- Anahtar Kelimeler: beam range biasing, beam selection complexity, Beamspace MIMO, mmWave spectrum, QR precoding
- İstanbul Medipol Üniversitesi Adresli: Evet
Özet
This letter proposes a computationally efficient beam selection (BS) technique that leverages beam range biasing (BRB) to improve the operational efficiency of beamspace multiple-input multiple-output (B-MIMO) systems. Conventional maximum magnitude BS (MM-BS) offers low complexity for B-MIMO; however, it leads to degradation in the system performance due to multi-user interference and inefficient radio frequency (RF) chain utilization. The proposed BRB technique adaptively penalizes the beams assigned to multiple users and promotes underutilized ones to mitigate interference. A two-stage user classification assigns beams to non-interfering users (NIU)s first, reducing the candidate set for others. Simulation results verify that the proposed algorithm perceptibly lowers computational overhead while delivering a sum-rate performance comparable to that of established benchmarks.