A Novel PAPR Reduction Scheme for Polar-Coded OFDM Systems

• Published in: IEEE communications letters Vol. 23; no. 12; pp. 2372 - 2375
• Main Authors: Matsumine, Toshiki, Ochiai, Hideki
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Coders; Codes; Decoding; Error analysis; Measurement; Orthogonal Frequency Division Multiplexing; orthogonal frequency-division multiplexing (OFDM); Peak to average power ratio; peak-to-average power ratio (PAPR); Polar codes; Receivers; Reduction
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2019.2943334

A novel joint channel coding and peak-to-average power ratio (PAPR) reduction technique for polar-coded orthogonal frequency-division multiplexing (OFDM) systems is proposed. The main concept is to introduce shaping indices to polar encoder, and generate multiple OFDM symbol candidates according to various shaping bit patterns and then select the one with the lowest PAPR as a transmitted signal. Since information and shaping bits can be jointly decoded using the conventional decoding algorithm of polar codes, transmission of side information is not required. The polar code design algorithm for efficient PAPR reduction is also discussed. It is demonstrated that the proposed shaping method offers a gain of more than 4.5dB in terms of PAPR performance without affecting the decoding complexity.