A peak power reduction scheme based on reversal of parity-bits for a block-coded OFDM signal

We propose a peak power reduction (PPR) scheme based on the reversal of parity-bits for a block-coded OFDM signal. In our PPR scheme, the entire parity-check block of the codeword is adaptively reversed, symbol-by-symbol, so as to minimize the PAPR of the OFDM-signal. At the receiver, the original codeword can be restored with sufficient accuracy by checking the syndrome of the received codeword and protecting a significant-bit of the codeword from transmission error. When (7,4), (31,21) and (31,26) BCH codes are employed, the PAPR of the OFDM signal, at the CCDF (complementary cumulative distribution function) of 10/sup -4/, can be reduced by about 2.8, 2.5 and 2.0 dB, respectively, by applying the PPR scheme while achieving approximately the same BER performance as the case without PPR in an exponentially decaying 6-path Rayleigh fading condition.

[1]  T. Wilkinson,et al.  Combined coding for error control and increased robustness to system nonlinearities in OFDM , 1996, Proceedings of Vehicular Technology Conference - VTC.

[2]  Johannes B. Huber,et al.  A novel peak power reduction scheme for OFDM , 1997, Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97.

[3]  Nelson Ray Sollenberger,et al.  Beyond 3G: wideband wireless data access based on OFDM and dynamic packet assignment , 2000, IEEE Commun. Mag..

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

[5]  Simon J. Shepherd,et al.  Asymptotic limits in peak envelope power reduction by redundant coding in orthogonal frequency-division multiplex modulation , 1998, IEEE Trans. Commun..

[6]  S. Weinstein,et al.  Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform , 1971 .

[7]  T. Wilkinson,et al.  Minimisation of the peak to mean envelope power ratio of multicarrier transmission schemes by block coding , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.

[8]  Leonard J. Cimini,et al.  Peak-to-average power ratio reduction of an OFDM signal using partial transmit sequences , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).