Spatial Modulation in the Presence of I/Q Imbalance: Optimal Detector Performance Analysis
IEEE Communications Letters, vol.22, no.8, pp.1572-1575, 2018 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 22 Issue: 8
- Publication Date: 2018
- Doi Number: 10.1109/lcomm.2018.2836448
- Journal Name: IEEE Communications Letters
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.1572-1575
- Keywords: Error performance analysis, I/Q imbalance, maximum likelihood detection, spatial modulation
- Yozgat Bozok University Affiliated: No
Abstract
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 bit 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.