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Estimation and compensation of clipping noise in OFDMA systems

By Ying Chen, Jian (Andrew) Zhang and Dhammika Jayalath

Abstract

We propose an efficient and low-complexity scheme for estimating and compensating clipping noise in OFDMA systems. Conventional clipping noise estimation schemes, which need all demodulated data symbols, may become infeasible in OFDMA systems where a specific user may only know his own modulation scheme. The proposed scheme first uses equalized output to identify a limited number of candidate clips, and then exploits the information on known subcarriers to reconstruct clipped signal. Simulation results show that the proposed scheme can significantly improve the system performance

Topics: 090609 Signal Processing, 100510 Wireless Communications, OFDMA, Clipping Noise, Compensation
Publisher: Institute of Electrical and Electronics Engineers
Year: 2010
DOI identifier: 10.1109/TWC.2010.02.090128
OAI identifier: oai:eprints.qut.edu.au:29143

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