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Differentially-encoded rectangular spatial modulation approaches the performance of its coherent counterpart

Xiao, Lixia, Xiao, Pei, Ruan, Hang, Ishikawa, Naoki, Lu, Lei, Xiao, Yue and Hanzo, Lajos (2020) Differentially-encoded rectangular spatial modulation approaches the performance of its coherent counterpart IEEE Transactions on Communications.

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A simplified rectangular differential spatial modulation (S-RDSM) scheme is conceived for massive multiple-input multiple-output (MIMO) systems dispensing with the channel state information (CSI). In the proposed S-RDSM scheme, the information bits are first mapped to a conventional SM symbol and then rectangular differential encoding is invoked between a pair of SM symbols. Then a non-coherent detector relying on a forgetting factor is developed, which requires no CSI at the receiver. Explicitly, a low-complexity hard limited maximum likelihood (HL-ML) detector is conceived for our generalized SRDSMscheme,whichischaracterizedbyourtheoreticalanalysis. Furthermore, we derive the optimal forgetting factor in closed form, which is capable of significantly reducing the complexity of the associated optimization. Finally, the upper bounds of the average bit error probability (ABEP) are derived using the moment generating function (MGF), and are validated by our simulation results. Both the theoretical and simulation results have shown that the proposed S-RDSM system outperforms the existing non-coherent schemes, despite operating at 10% of the benchmarker’s complexity, whilst approaching the performance of its coherent SM counterpart at a comparable complexity.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Ishikawa, Naoki
Lu, Lei
Xiao, Yue
Hanzo, Lajos
Date : 28 August 2020
Funders : EPSRC - Engineering and Physical Sciences Research Council, Royal Society’s Global Challenges Research Fund Grant, European Research Council’s Advanced Fellow Grant QuantCom
Copyright Disclaimer : © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Rectangular Differential Spatial Modulation; Spatial Modulation; Average Bit Error Probability; Maximum Likelihood.
Depositing User : Diane Maxfield
Date Deposited : 11 Sep 2020 16:40
Last Modified : 11 Sep 2020 16:40

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