Clipping noise mitigation for channel estimation in OFDM systems

This letter provides a new technique to mitigate the clipping noise on pilot symbols in clipped and pilot-aided orthogonal frequency division multiplexing (OFDM) systems. The basic principle is to directly filter the clipping noise on the positions of pilots in the frequency domain before the insertion of pilots. Simulation results show that the new technique can effectively improve channel estimation and system performance

[1]  Shixin Cheng,et al.  Clipping effects on channel estimation and signal detection in OFDM , 2003, 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003..

[2]  Dov Wulich,et al.  Level clipped high-order OFDM , 2000, IEEE Trans. Commun..

[3]  Robert L. Frank,et al.  Polyphase codes with good nonperiodic correlation properties , 1963, IEEE Trans. Inf. Theory.

[4]  Shaoqian Li,et al.  A minimum clipping power loss scheme for mitigating the clipping noise in OFDM , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[5]  Alexander M. Haimovich,et al.  Iterative estimation and cancellation of clipping noise for OFDM signals , 2003, IEEE Communications Letters.

[6]  Jean Armstrong,et al.  Effects of clipping on the error performance of OFDM in frequency selective fading channels , 2004, IEEE Transactions on Wireless Communications.

[7]  Jean Armstrong,et al.  Peak-to-average power reduction for OFDM by repeated clipping and frequency domain filtering , 2002 .

[8]  J.M. Paez-Borrallo,et al.  DFT-based channel estimation in 2D-pilot-symbol-aided OFDM wireless systems , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).

[9]  David C. Chu,et al.  Polyphase codes with good periodic correlation properties (Corresp.) , 1972, IEEE Trans. Inf. Theory.