An improved frequency domain turbo equalizer for single-carrier spatial modulation systems

Zhao, Yan, Yang, Ping, Xiao, Yue, Xiao, Lixia, Dong, Binhong, and Xiang, Wei (2017) An improved frequency domain turbo equalizer for single-carrier spatial modulation systems. IEEE Transactions on Vehicular Technology, 66 (8). pp. 7568-7572.

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Abstract

In this paper, a new time-domain soft-decision feedback (TDSDF) aided frequency domain turbo equalizer (FDTE) is proposed for broadband single-carrier (SC) spatial modulation (SM) systems. Specifically, the proposed equalizer operates on a frame-by-frame basis and is designed based on the minimum block-averaged mean-square error (MBMSE) criterion. To tackle the error propagation problem, a metric in consideration of the reliability of the feedback information is considered. The optimal coefficients of the forward and feedback filters involved in the TDSDF-FDTE design are derived analytically. Simulation results show that the proposed nonlinear TDSDF-FDTE detector is capable of offering a better tradeoff between the bit-error-rate (BER) performance and the imposed computational complexity than the conventional linear frequency domain turbo demapper (FDTD) conceived for SC-SM systems. Furthermore, a 4 dB improvement is observed for the unbalanced channel.

Item ID: 54062
Item Type: Article (Research - C1)
ISSN: 1939-9359
Keywords: Decision Feedback Equalizer (DFE); Frequency Domain Turbo Equalizer (FDTE); Multiple-Input Multiple-Output (MIMO); Single-Carrier (SC); Spatial Modulation (SM)
Date Deposited: 14 Jun 2018 01:25
FoR Codes: 40 ENGINEERING > 4006 Communications engineering > 400601 Antennas and propagation @ 100%
SEO Codes: 86 MANUFACTURING > 8617 Communication Equipment > 861701 Network Infrastructure Equipment @ 100%
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