Side information-free PTS-PAPR reduction via pilot assisted estimation of phase factors in an OFDM frame with a preamble

A new partial transmit sequence (PTS) technique for orthogonal frequency division multiplexing (OFDM) signals which does not require side information, is proposed. In the proposed method, the transmitter applies PTS to reduce the peak-to-average power ratio (PAPR) and does not send the side information on the PTS phase factors to the receiver. Based on the OFDM symbol structure having pilot subcarriers, the receiver jointly estimates the channel and PTS phase factors from the pilot subcarriers. The proposed technique inherently causes bit error rate (BER) loss depending on the PTS subgroup size. However, simulation results demonstrate that if the PTS subgroup size is carefully chosen, the proposed method can reduce the PAPR significantly with a negligible BER loss.

[1]  David Tse,et al.  Fundamentals of Wireless Communication , 2005 .

[2]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

[3]  Jae Hong Lee,et al.  PAPR reduction of OFDM signals using a reduced complexity PTS technique , 2004, IEEE Signal Processing Letters.

[4]  Ramjee Prasad,et al.  OFDM for Wireless Multimedia Communications , 1999 .

[5]  Nelson Sollenberger,et al.  Peak-to-average power ratio reduction of an OFDM signal using partial transmit sequences , 2000, IEEE Communications Letters.

[6]  Umberto Mengali,et al.  A comparison of pilot-aided channel estimation methods for OFDM systems , 2001, IEEE Trans. Signal Process..

[7]  José Manuel Páez-Borrallo,et al.  Peak power reduction for OFDM systems with orthogonal pilot sequences , 2006, IEEE Transactions on Wireless Communications.

[8]  Chintha Tellambura,et al.  SLM and PTS peak-power reduction of OFDM signals without side information , 2005, IEEE Transactions on Wireless Communications.

[9]  Seung Hee Han,et al.  An overview of peak-to-average power ratio reduction techniques for multicarrier transmission , 2005, IEEE Wireless Communications.

[10]  B.L. Evans,et al.  Long range channel prediction for adaptive OFDM systems , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[11]  A. M. Abdullah,et al.  Wireless lan medium access control (mac) and physical layer (phy) specifications , 1997 .

[12]  J. Huber,et al.  OFDM with reduced peak-to-average power ratio by optimum combination of partial transmit sequences , 1997 .

[13]  Gerald Matz,et al.  MMSE and adaptive prediction of time-varying channels for OFDM systems , 2005, IEEE Transactions on Wireless Communications.