Dong WANG¹, Nianyu ZOU^2*, Gaofeng CUI¹, Yi YANG², Yoshinori NAMIHIRA³, and Yinghai ZHANG¹

¹Information and Electronics Technology Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China
²Research Institute of Photonics, Dalian Polytechnic University, Dalian 116034, China
³Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan

(Received May 15, 2012; Accepted September 12, 2012)

A companding method for peak-to-average power ratio (PAPR) reduction in optical orthogonal frequency division multiplexing systems has been proposed and simulated. The proposed scheme is based on the modified hyperbolic tangent transform, which can enlarge the small signals and compress the large signals while keeping the average power invariant. Simulation results verify that the proposed companding scheme can markedly decrease the PAPR, and a good bit error rate performance is obtained.

Key words: peak-to-average power ratio (PAPR), orthogonal frequency division multiplexing, hyperbolic tangent, companding

^*E-mail address: n_y_zou@dlpu.edu.cn