PAPR Reduction in Limited Feedback MIMO Beeamforming OFDM Systems 


Vol. 32,  No. 8, pp. 758-766, Aug.  2007


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  Abstract

High peak-to-average power ratio (PAPR) is one of serious problems in the orthogonal frequency division multiplexing (OFDM) systems. This paper proposes a PAPR reduction technique for limited feedback multiple input multiple output (MIMO) OFDM systems. The proposed method is based on the null space of the MIMO channel where a dummy signal is made in the channel’s null space and then, subtracted from the original signal to reduce the PAPR. First, we show that a problem occurs when the existing method is directly applied to limited feedback MIMO case. Then, a weight function for the dummy signal is proposed to mitigate the degradation of the receiver performance while still reducing PAPR significantly. The weight function is derived from a constrained nonlinear optimization problem to minimize the mean square error between the received signal and its ideal signal. Simulation results shows that the proposed technique provides about 2.5dB PAPR reduction with 0.2dB bit-error probability loss.

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  Cite this article

[IEEE Style]

J. Shin, E. Jeong, Y. H. Lee, "PAPR Reduction in Limited Feedback MIMO Beeamforming OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 8, pp. 758-766, 2007. DOI: .

[ACM Style]

Joonwoo Shin, Eui-Rim Jeong, and Yong Hoon Lee. 2007. PAPR Reduction in Limited Feedback MIMO Beeamforming OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 32, 8, (2007), 758-766. DOI: .

[KICS Style]

Joonwoo Shin, Eui-Rim Jeong, Yong Hoon Lee, "PAPR Reduction in Limited Feedback MIMO Beeamforming OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 8, pp. 758-766, 8. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880