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Estimation and compensation of clipping noise in OFDMA systems

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3 Author(s)
Ying Chen ; Inst. for Telecommun. Res., Univ. of South Australia, Adelaide, SA, Australia ; Jian Zhang ; Jayalath, A.D.S.

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.

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Wireless Communications, IEEE Transactions on  (Volume:9 ,  Issue: 2 )