Spatial Modulation in the Presence of I/Q Imbalance: Optimal Detector & Performance Analysis

Canbilen A. E. , Alsmadi M. M. , Basar E., Ikki S. S. , Gultekin S. S. , DEVELİ I.

IEEE COMMUNICATIONS LETTERS, cilt.22, sa.8, ss.1572-1575, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Konu: 8
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1109/lcomm.2018.2836448
  • Sayfa Sayıları: ss.1572-1575


Spatial modulation (SM) is affected by the impacts of in-phase and quadrature-phase imbalance (IQI), which cause degradation of system performance in practical terms. To address this concern, an optimal maximum likelihood detector is proposed for SM-based transmission and the system performance is analyzed by computer simulations and analytical derivations. In addition, this optimal receiver is compared with a non-optimal receiver. Specifically, pairwise and average hit error probabilities are derived for the optimal detector. The results prove that IQI is a critical issue for SM-based transmission and the proposed optimal receiver significantly enhances the SM system performance in the presence of IQI.