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Peak to average power ratio reduction for MIMO-OFDM wireless system using nonlinear precoding | IEEE Conference Publication | IEEE Xplore

Peak to average power ratio reduction for MIMO-OFDM wireless system using nonlinear precoding


Abstract:

This paper investigates peak-to-average power ratio (PAR) reduction with constrained transmit power for spatially precoded downlink transmission, based on orthogonal freq...Show More

Abstract:

This paper investigates peak-to-average power ratio (PAR) reduction with constrained transmit power for spatially precoded downlink transmission, based on orthogonal frequency-division multiplexing (OFDM). We generalize the concept of multiuser Tomlinson-Harashima (T-H) precoding and propose a nonlinear spatial precoder, termed a complex sphere precoder (CSP), which has the same throughput and error performance as the T-H precoder, but achieves both a low PAR and low average transmit power. Our study shows that a sequential CSP over individual tones achieves a significant PAR reduction while requiring a moderate transmit power increase. The suboptimal per-tone lattice search constitutes a good compromise between performance and complexity.
Date of Conference: 29 November 2004 - 03 December 2004
Date Added to IEEE Xplore: 17 January 2005
Print ISBN:0-7803-8794-5
Conference Location: Dallas, TX, USA

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