A Weighted OFDM Signal Scheme for Peak-to-Average Power Ratio Reduction of OFDM Signals

• Published in: IEEE transactions on vehicular technology Vol. 62; no. 3; pp. 1406 - 1409
• Main Authors: CHANG EON SHIN, KYUNG SOO RIM, KIM, Youngok
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-2013; Institute of Electrical and Electronics Engineers
• Subjects: Amplifiers; Applied sciences; Bit error rate; Circuit properties; Convolution; Detection, estimation, filtering, equalization, prediction; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Fourier transforms; Information, signal and communications theory; Multiplexing; orthogonal frequency-division multiplexing (OFDM); Peak to average power ratio; peak-to-average-power ratio (PAPR); Radiocommunications; Receivers; Signal and communications theory; Signal, noise; Telecommunications; Telecommunications and information theory; Transmitters. Receivers; weighted data; Wireless communication; Performance evaluation; Filtering; Computer simulation; Bit error rate; Peak to average power ratio; Receiver; Discrete data; Power electronics; weighted data; Band limited signal; Convolution; peak-to-average-power ratio (PAPR); Orthogonal frequency division multiplexing; Clipping; Numerical simulation; Masking; Discrete signal; Power amplifier; Effectiveness factor; Comparative study; orthogonal frequency-division multiplexing (OFDM)
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2012.2232949

In this paper, a peak-to-average-ratio (PAPR) reduction scheme based on a weighted orthogonal frequency-division multiplexing (OFDM) signal is proposed to reduce the PAPR without distortion in removing the weight at the receiver side. In the proposed scheme, a weight is imposed on each discrete OFDM signal via a certain kind of a bandlimited signal, and an OFDM signal formed with the weighted discrete data is then considered before a high power amplifier (HPA), whereas the original signal can be recovered completely at the receiver side. Meanwhile, the time duration needed to transmit the weighted OFDM signal is the same as the time duration for the original OFDM signal. The effectiveness of the proposed scheme is evaluated with computer simulations. According to numerical results, the PAPR of the weighted OFDM signal is smaller than that of the clipping and filtering (C&F) method, and the bit-error-rate (BER) performance of the weighted OFDM system is improved compared with the C&F method. Here, the proposed method is simpler than the C&F method.