Generalised differential scheme for spatial modulation systems. Issue 13 (19th September 2017)

• Record Type: Journal Article
• Authors: Kadathlal, Kavish; Xu, HongJun; Pillay, Narushan
• Is Part Of: IET communications. Volume 11:Issue 13(2017)
• Page Start: 2020
• Page End: 2026
• Publication Date: 2017-09-19
• Subjects: MIMO communication -- signal detection -- modulation; generalised differential scheme -- spatial modulation systems -- transmission scheme -- multiple‐input multiple‐output systems -- coherent detection -- optimal error performance -- channel state information -- CSI -- detection complexity -- error performance penalty -- GD‐SM -- generalised differential modulation -- optimal power allocation -- M‐ary quadrature amplitude modulation -- M‐ary phase shift keying constellation -- conventional differential SM; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2017.0342
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Spatial modulation (SM) is an efficient transmission scheme based on multiple‐input multiple‐output systems. SM, by nature, requires coherent detection to achieve optimal error performance. This requires that the receiver has full knowledge of the channel state information (CSI), however, determining the CSI results in an increase in the detection complexity at the receiver. Differential modulation systems are capable of performing detection without knowledge of the CSI at the receiver, however, they suffer a 3 dB error performance penalty as compared to their coherent counterparts. In this study, the authors present a generalised differential scheme for SM (GD‐SM) based on generalised differential modulation, which is capable of reducing the performance penalty incurred through optimal power allocation. Furthermore, they extend the architecture of GD‐SM and optimal power allocation to conventional differential SM. The architecture of the proposed systems, advantageously permits the use of either M ‐ary quadrature amplitude modulation or M ‐ary phase shift keying constellations. Simulation and theoretical results demonstrate that GD‐SM incurs only about 0.5 dB performance loss as compared to coherent SM when the frame length is 400.