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International Journal of Antennas and Propagation - Volume 2017 2017, Article ID 3581592, 9 pages - https:-doi.org-10.1155-2017-3581592

Research Article

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications CQUPT, Chongqing 400065, China

School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications CQUPT, Chongqing 400065, China

Correspondence should be addressed to Xiaorong Jing

Received 6 September 2016; Revised 12 December 2016; Accepted 25 December 2016; Published 16 January 2017

Academic Editor: Kyeong Jin Kim

Copyright © 2017 Xiaorong Jing et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Generalized spatial modulation GSM is a spectral and energy efficient multiple-input multiple-output MIMO transmission scheme. It will lead to imperfect detection performance with relatively high computational complexity by directly applying the original QR-decomposition with M algorithm QRD-M to the GSM scheme. In this paper an improved QRD-M algorithm is proposed for GSM signal detection, which achieves near-optimal performance but with relatively low complexity. Based on the QRD, the improved algorithm firstly transforms the maximum likelihood ML detection of the GSM signals into searching an inverted tree structure. Then, in the searching process of the branches, the branches corresponding to the illegitimate transmit antenna combinations TACs and related to invalid number of active antennas are cut in order to improve the validity of the resultant branches at each level by taking advantage of characteristics of GSM signals. Simulation results show that the improved QRD-M detection algorithm provides similar performance to maximum likelihood ML with the reduced computational complexity compared to the original QRD-M algorithm, and the optimal value of parameter of the improved QRD-M algorithm for detection of the GSM scheme is equal to modulation order plus one.





Autor: Xiaorong Jing, Mingyue Wang, Wei Zhou, and Hongqing Liu

Fuente: https://www.hindawi.com/



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