Soft-feedback time-domain turbo equalization for single-carrier generalized spatial modulation

Zhao, Yan, Yang, Ping, Xiao, Yue, Dong, Binhong, and Xiang, Wei (2018) Soft-feedback time-domain turbo equalization for single-carrier generalized spatial modulation. IEEE Transactions on Vehicular Technology, 67 (10). pp. 9421-9434.

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Abstract

In this paper, a new class of soft-decision feedback aided time-domain turbo equalizer (TDTE) based on the minimum mean-square error criterion is proposed for broadband single-carrier (SC) generalized spatial modulation (GSM) systems. First, a time-domain soft-decision feedback (TDSDF) aided TDTE is proposed, which operates on a vector-by-vector basis. In order to provide a flexible tradeoff between complexity and performance, time-invariant filter coefficients are derived to provide a low-complexity approximate solution to the proposed TDSDF-TDTE. Furthermore, a soft-feedback interference cancelation (SFIC) aided TDTE is proposed for SC-GSM systems with a lower complexity, where the computation of the second-order moment of matrices is completely avoided. Finally, bi-directional soft-decision feedback aided TDTEs are proposed by using a time-reversed TDSDF-TDTE/SFIC-TDTE in conjunction with a ordinary TDSDF-TDTE/SFIC-TDTE so as to harvest time-reverse diversity and to mitigate the error propagation. An extrinsic information transfer chart based analysis and bit error rate simulation results are presented to demonstrate the superior performance of the proposed soft-decision feedback aided TDTEs as opposed to the original TDTEs, while achieving a lower complexity.

Item ID: 56068
Item Type: Article (Research - C1)
ISSN: 1939-9359
Keywords: single carrier (SC), generalized spatial modulation (GSM), time-domain turbo equalizer (TDTE), soft-decision feedback equalizer (SDFE)
Funders: National Natural Science Foundation of China (NNSFC), National Mobile Communications Research Laboratory, Southeast University (NMCRL)
Projects and Grants: NNSFC Grant 61671131, NNSFC grant 61501095, NMCRL 2017D16
Date Deposited: 07 Nov 2018 09:32
FoR Codes: 10 TECHNOLOGY > 1005 Communications Technologies > 100510 Wireless Communications @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890103 Mobile Data Networks and Services @ 100%
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