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

Long, Hang and Kim, Kyeong Jin and Xiang, Wei and Shen, Shanshan and Zheng, Kan and Wang, Wenbo (2012) Improved wideband precoding with arbitrary subcarrier grouping in MIMO-OFDM systems. ETRI Journal, 34 (1). pp. 9-16. ISSN 1225-6463

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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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Open Access journal. Copyright of ETRI Journal is the property of Electronics & Telecommunications Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 24 Jan 2013 01:08
Last Modified: 18 Jul 2014 05:23
Uncontrolled Keywords: wideband precoding; bit error ratios; ergodic capacity; independent channels; MIMO-OFDM systems; narrow bands; optimum performance; orthogonal frequency division multiplexing systems; precoders; sub-carriers; subcarrier
Fields of Research : 08 Information and Computing Sciences > 0805 Distributed Computing > 080503 Networking and Communications
10 Technology > 1005 Communications Technologies > 100502 Broadband and Modem Technology
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
Socio-Economic Objective: B Economic Development > 89 Information and Communication Services > 8901 Communication Networks and Services > 890103 Mobile Data Networks and Services
Identification Number or DOI: 10.4218/etrij.12.0111.0050

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