NDLI: Semidefinite further relaxation on likelihood ascent search detection algorithm for high-order modulation in massive MIMO system

Content Provider	IET Digital Library
Author	Li, Lin Meng, Weixiao Li, Cheng
Abstract	Recent studies have shown that existing detection algorithms are not suitable for high-order quadrature amplitude modulation (QAM) in massive MIMO system. In this paper, with an equivalent objective function by QR decomposition and further relaxation on the constrains, the authors develop an improved semidefinite further relaxation detector (SFRD), which is proved to be convex and has solutions within polynomial complexity time. Using the detection result from the proposed SFRD as the initial vector, they propose a novel semidefinite further relaxation on the likelihood ascent search (SFRLAS) detection algorithm. It has been shown through their studies that the proposed SFRLAS scheme can effectively approach the optimum bit error rate from the maximum-likelihood detection algorithm for systems with high-order QAM and large-scale antennas, however, with a lower computational complexity. The spectral efficiency converges to the theoretical value at a much lower required average received signal-to-noise ratio. It is an effective method for high-order QAM signal detection in massive MIMO system.
Starting Page	801
Ending Page	808
Page Count	8
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 6, Apr (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.1160
Journal	IET Communications
Publisher Date	2016-12-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Combinatorial Mathematics Computational Complexity Equivalent Objective Function High Order Modulation High-order QAM Signal Lagrange Double Dual Program Method Large-scale Antenna Likelihood Ascent Search Detection Algorithm Massive MIMO System Mathematical Programming Maximum-likelihood Detection Algorithm MIMO Communication Modulation And Coding Method Optimisation Technique Polynomial Polynomial Complexity Time QR Decomposition Quadrature Amplitude Modulation Radio Link And Equipment Search Problem Semidefinite Further Relaxation Detector Semidefinite Further Relaxation on Likelihood Ascent Search SFRD Signal to Noise Ratio
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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