Differential Full Diversity Spatial Modulation using Amplitude Phase Shift Keying
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Diversity is a fundamental concept used to reduce the adverse effects of fading in wireless communications. Differential full diversity spatial modulation (DFD-SM) is a differential spatial modulation (DSM) scheme that makes use of a cyclic signaling phase shift keying (PSK) constellation to achieve transmit diversity. In this paper, firstly, we extend the work of DFD-SM to improve its throughput and/or error performance, by making use of an amplitude phase shift keying (APSK) constellation. Next, a power allocation concept(PAC) based on generalized differential modulation (GDM) is applied to DFD-SM using APSK. Finally we derive a theoretical upper bound on the average bit error probability (ABEP) for DFD-SM using APSK. It is shown through Monte Carlo simulations that the proposed DFD-SM using APSK scheme outperforms conventional DFD-SM by approximately 1 dB at the same throughput, and that the proposed power allocation scheme provides an approximate 3 dB gain over the conventional scheme.
KeywordsSpatial Modulation (SM), differential spatial modulation (DSM), full transmit diversity, amplitude phase shift keying (APSK)
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 2018 vol. 27, č. 1, s. 151-158. ISSN 1210-2512
- 2018/1