An Iterative Peak-Power Reduction Method Applicable to OFDMA Systems for Broadband Wireless Communications

• Published in: 2007 16th IST Mobile and Wireless Communications Summit pp. 1 - 5
• Main Authors: Tomisato, S., Nishizaki, M., Hata, M., Fujii, H., Hagiwara, J.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-07-2007
• Subjects: Bit error rate; Broadband communication; Computer simulation; Degradation; Iterative methods; iterative signal processing; OFDM transmission; OFDMA; PAPR; Peak to average power ratio; Power generation; Signal generators; Signal processing; Wireless communication
• ISBN: 9781424416622; 1424416620
• ISSN: 2167-1753
• DOI: 10.1109/ISTMWC.2007.4299176

In this paper, we propose a new peak power reduction method applicable to OFDMA systems for broadband wireless communications, in which a user uses some frequency bands in all system bands, by using iterative peak reduction. The proposed method separates the system bands into an information signal band and peak-reduction signal insertion bands, and generates peak-reduction signals in the peak-reduction signal insertion bands by using iterative signal processing. Moreover, low power peak-reduction signals are generated in the information signal band to improve peak-reduction performance. The results by computer simulations show that the proposed method can achieve the PAPR reduction of 3 to 4dB with almost no degradation of BER performance.