Improved wideband precoding with arbitrary subcarrier grouping in MIMO-OFDM systems

Long, Hang, Kim, Kyeong Jin, Xiang, Wei, Shen, Shanshan, Zheng, Kan, and Wang, Wenbo (2012) Improved wideband precoding with arbitrary subcarrier grouping in MIMO-OFDM systems. ETRI Journal, 34 (1). pp. 9-16.

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Abstract

Precoding in the multiple-input multiple-output orthogonal frequency division multiplexing system is investigated. In conventional wideband precoding (WBP), only one precoder, obtained from the decomposition of the subcarrier independent channel matrix, is used for all subcarriers. With an investigation of the relationship between the subcarrier independent channel matrix and the temporal/frequency channels, an improved WBP scheme is proposed for practical scenarios in which a part of subcarriers are allocated to a user. The improved WBP scheme is a generalized scheme of which narrow-band precoding and conventional WBP schemes are special modes. Simulation results demonstrate that the improved WBP scheme almost achieves the optimum performance of a single precoder and outperforms the conventional WBP scheme in terms of the bit error ratio and ergodic capacity with slight complexity increase. The largest advantage of the improved WBP scheme on signal-to-noise ratio in simulation results is over 2.1 dB.

Item ID: 43324
Item Type: Article (Research - C1)
ISSN: 2233-7326
Keywords: MIMO, OFDM, wideband precoding
Funders: National Basic Research Program of China (NBRPC) 973 Program, National Science Foundation for Postdoctoral Scientists of China (NSF)
Projects and Grants: NBRPC grant 2012CB316005, NSF grant 20090005120002
Date Deposited: 24 Feb 2016 07:47
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890199 Communication Networks and Services not elsewhere classified @ 100%
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