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Unified Power Allocation for Receive Spatial Modulation Based on Approximate Optimization

Yang, Ping, Zhu, Jing, Liu, Zilong, Xiao, Yue, Li, Shaoqian and Xiang, Wei (2018) Unified Power Allocation for Receive Spatial Modulation Based on Approximate Optimization IEEE Access, 6. pp. 49450-49459.

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In this paper, a novel unified power allocation (PA) framework is proposed for receive (pre-coding aided) spatial modulation (RSM). We find that the PA matrix design can be formulated as a non-convex quadratically constrained quadratic program (QCQP) problem, whose solution is generally intractable. To tackle this problem, we propose a pair of solvers having different trade-offs in terms of biterror- rate (BER) and complexity. Specifically, we first propose a successive convex approximation (SCA) method, to convert the non-convex QCQP problem under consideration into a series of linear convex subproblems, where the latter can be easily solved by the classic polynomial-time based optimization method, i.e., the interior point method. To further reduce the computational complexity, we propose an augmented Lagrangian multiplier (ALM) method, which transforms the challenging non-convex constrained PA optimization problem into its unconstrained counterpart, which can be efficiently solved by an iterative manner. Our simulation results show that both the proposed SCA and ALM methods are capable of substantially improving the system error performance compared with conventional RSM system without PA as well as conventional PA-aided RSM schemes.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Yang, Ping
Zhu, Jing
Xiao, Yue
Li, Shaoqian
Xiang, Wei
Date : 6 September 2018
DOI : 10.1109/ACCESS.2018.2865458
Copyright Disclaimer : © 2018 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See for more information.
Uncontrolled Keywords : Approximate approximation; Index modulation; Power allocation (PA); Receive spatial modulation (RSM); Pre-coding aided spatial modulation(PSM)
Depositing User : Clive Harris
Date Deposited : 12 Sep 2018 07:32
Last Modified : 14 Nov 2018 10:20

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