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Improved Wideband Precoding with Arbitrary Subcarrier Grouping in MIMO-OFDM Systems
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  • Improved Wideband Precoding with Arbitrary Subcarrier Grouping in MIMO-OFDM Systems
  • Improved Wideband Precoding with Arbitrary Subcarrier Grouping in MIMO-OFDM Systems
저자명
Long. Hang,Kim. Kyeong-Jin,Xiang. Wei,Shen. Shanshan,Zheng. Kan,Wang. Wenbo
간행물명
ETRI journal
권/호정보
2012년|34권 1호|pp.9-16 (8 pages)
발행정보
한국전자통신연구원
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

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.