Low Complexity Wizard Amplitude Shaping (WAS) System for PAPR Reduction
نویسندگان
چکیده
Orthogonal Frequency Division Multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wide-band digital communication. Despite its advantages, it has a major drawback of its high Peak-to-Average Power Ratio (PAPR) value which degrades its efficiency and increases its cost. In this paper, two proposed systems are discussed to reduce the PAPR value. They depend on a signal conversion to an approximated triangle signal by means of a proposed Wizard Amplitude Shaping (WAS) encoder. The whole characteristics mathematical analysis are presented for the proposed systems. Additionally, the complexity evaluations, reliability, In-band distortion; in terms of Error Vector Magnitude (EVM), time and frequency domain behaviors are explained. The two proposed systems are compared with the conventional OFDM system in terms of PAPR and Bit Error Rate (BER) under Additive White Gaussian Noise (AWGN) channel and multipath fading channels. Furthermore, the impacts of the proposed schemes design parameters, are studied.
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