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 bit-error-rate 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 the conventional RSM system without PA as well as conventional PA-aided RSM schemes.

Item ID: 55941
Item Type: Article (Research - C1)
ISSN: 2169-3536
Keywords: approximate approximation, index modulation, power allocation (PA), receive spatial modulation (RSM), pre-coding aided spatial modulation(PSM)
Copyright Information: Copyright © 2018, IEEE.
Funders: National Science Foundation of China (NSFC), Foundation Project of the National Key Laboratory of Science and Technology on Communications (FPNKL), International Science & Technology Cooperation Project of Sichuan Province (ISTCPSP)
Projects and Grants: NSFC no. 61501095, FPNKL no. 6142102010702, ISTCPSP no. 2017HH0009
Date Deposited: 24 Oct 2018 09:36
FoR Codes: 40 ENGINEERING > 4006 Communications engineering > 400608 Wireless communication systems and technologies (incl. microwave and millimetrewave) @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890104 Mobile Telephone Networks and Services @ 100%
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