An Adaptive Clipping and Filtering Technique for PAPR Reduction of OFDM Signals

• Published in: Circuits, systems, and signal processing Vol. 32; no. 3; pp. 1335 - 1349
• Main Authors: Lee, Byung Moo, Kim, Youngok
• Format: Journal Article
• Language: English
• Published: Boston SP Birkhäuser Verlag Boston 01-06-2013; Springer Nature B.V
• Subjects: Circuits; Circuits and Systems; Clipping; Cooperation; Electrical Engineering; Electrical equipment; Electronics and Microelectronics; Engineering; Filtering; Filtration; Instrumentation; Iterative methods; Orthogonal Frequency Division Multiplexing; Reduction; Signal processing; Signal,Image and Speech Processing; OFDM; Peak-to-average power ratio; Iterative clipping and filtering
• ISSN: 0278-081X; 1531-5878
• DOI: 10.1007/s00034-012-9512-0

In recent years, many peak-to-average power ratio (PAPR) reduction techniques have been proposed for orthogonal frequency division multiplexing (OFDM) signals. Among various techniques, the iterative clipping and filtering (ICAF) technique has been considered as a practical scheme, and widely used owing to its non-expansion of bandwidth, low computational complexity, and simplicity in implementation without receiver-side cooperation. However, the performance of conventional ICAF technique is degraded, because the same signals are iteratively clipped with a fixed clipping threshold (CT) in every clipping operation. In this paper, we analyze the performance of conventional ICAF technique, and then propose an adaptive ICAF scheme, which clips the signal with an adaptively modified CT in every clipping operation to achieve enhanced PAPR reduction of OFDM signals. Simulation results show that the proposed scheme significantly outperforms the conventional scheme, in PAPR reduction of OFDM signals at the same number of iterations.