Title :
An adaptive soft clipping method for spectrum sharing OFDMA systems
Author :
Fujiwara, Toshihisa ; Tomisato, Shigeru ; Hata, Masaharu ; Fujii, Hiromasa ; Asai, Takahiro ; Okumura, Yukihiko
Author_Institution :
Grad. Sch. of Natural Sci. & Technol., Okayama Univ., Okayama, Japan
Abstract :
This paper proposes an adaptive soft clipping method for spectrum sharing OFDMA systems. The proposed method controls in-band and out-of-band distortion power by changing the nonlinearity parameter of soft clipping. The simulation results show that the proposed method can control the distortion power by 10 dB for a practical power amplifier. The results also show that a low-peak OFDMA transmitter can be realize with reasonable computational complexity because iterative processing for peak power reduction is unnecessary.
Keywords :
OFDM modulation; computational complexity; iterative methods; power amplifiers; adaptive soft clipping method; computational complexity; in-band distortion power; iterative processing; low-peak OFDMA transmitter; nonlinearity parameter; out-of-band distortion power; peak power reduction; practical power amplifier; spectrum sharing OFDMA systems; Bit error rate; Computational complexity; Computational modeling; Computer simulation; Distortion; Filtering; OFDM; Peak to average power ratio; Power amplifiers; Transmitters; OFDM transmission; OFDMA; PAPR; Soft clipping; Spectrum sharing;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5450169
