PAPR reduction of the low complexity phase weighting method in OFDM communication system

Authors:
Nguyen Thanh Hieu;Sang-Woo Kiom;Heung-Gyoon Ryu
Affiliations:
Dept. of Electron. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea;-;-
Venue:
IEEE Transactions on Consumer Electronics
Year:
2005

Citing 0
Cited 3

A Low-Complexity PTS-based PAPR Reduction Technique for OFDM Signals without Transmission of Side Information

Journal of Signal Processing Systems
Effect of nonlinear amplifier in companded OFDM with application to 802.11n WLAN

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Effects of narrowband interference and nonlinear amplifier in companded OFDM with application to 802.11n WLAN

MILCOM'09 Proceedings of the 28th IEEE conference on Military communications

Quantified Score

Hi-index	0.43

Visualization

Abstract

Orthogonal frequency division multiplexing (OFDM) has been used in many communication systems. However, the major drawback of OFDM system is high peak-to-average-power ratio (PAPR). In this paper, we introduce low complexity phase weighting method to reduce PAPR of OFDM signals. Proposed method is derived from property of discrete Fourier transform (DFT) of periodical sequences. PAPR can be reduced efficiently by phase weighting method with low complexity. The simulation results show the same PAPR reduction efficiency of proposed method in comparison with partial transmit sequence (PTS) or sub-block phase weighting (SPW). The proposed technique can reduce 2.15 dB of PAPR with two phase-factors and 3.95 dB of PAPR with four phase-factors. The analysis on complexity presents remarkable improvement of low complexity phase weighting method. Proposed method odd case can save 75% and 87.5% number of multiplications of PTS method and SPW method separately. The other case of proposed method, even case, can save near 60% number of additions of PTS and over 70% of SPW.