Dynamic Sidelobe Multiplexing in Beamspace MIMO Systems

Karabacak M., Afeef L., Arslan H.

IEEE Wireless Communications Letters, cilt.9, sa.12, ss.2216-2219, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 12
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1109/lwc.2020.3019455
  • Dergi Adı: IEEE Wireless Communications Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Sayfa Sayıları: ss.2216-2219
  • Anahtar Kelimeler: MIMO communication, Multiplexing, Radio frequency, Receivers, Signal to noise ratio, Transmitting antennas, Beamspace MIMO, mmWave, multiplexing, multi-stream data, spectral efficiency
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

Recent studies on multiplexing concept over beamspace multiple-input-multiple-output (MIMO) can reduce the need for using phase shifters while keeping the directivity performance at similar levels. Thus, beamspace MIMO provides cost-effective and simple hardware designs for millimeter-wave (mmWave) systems. However, the number of users/streams that can be supported at the same time-frequency resource is limited to the number of radio-frequency (RF) chains. In this letter, to overcome this restriction, dynamic sidelobe multiplexing (DSM) algorithm is proposed. The proposed multiplexing technique precodes the transmitted data over transmitter beams in order to open up a new path to the receiver. Therefore, the proposed method provides an opportunity to exceed the limits of conventional hardware usage in beamspace MIMO. The numerical results show that the proposed approach enhance the system performance for more than 50% compared to conventional beamspace MIMO techniques.