Effects of clipping on the performance of OFDM with modified mapping

Author

Seong, Baek-min ; Lee, Woo-Jae ; Joo, Chang-Bok

Author_Institution

Div. of Electr. & Electron. Eng., Kyungnam Univ., Masan, South Korea

Volume

2

fYear

2002

fDate

28-31 Oct. 2002

Firstpage

944

Abstract

One of the important problems in an OFDM system is the large PAPR of the output signal, which can result in significant signal distortion in the presence of nonlinear amplifiers. To reduce the PAPR, we use fundamentally the level clipping and propose the modified mapping and demapping method for effective reducing the PAPR of the OFDM signals with level clipping. We can significantly improve the BER performance characteristics for the OFDM system. We discussed, through extensive computer simulations, the effects of level clipping and modified mapping and demapping method on the performance of the OFDM system, but there is a trade-off that has something to do with bandwidth and data rate.

Keywords

OFDM modulation; error statistics; BER performance; OFDM system; PAPR reduction; bandwidth; computer simulations; data rate; level clipping; modified demapping method; modified mapping method; nonlinear amplifiers; output signal; signal distortion; Bandwidth; Bit error rate; Constellation diagram; Fading; Large Hadron Collider; OFDM modulation; Peak to average power ratio; Power system reliability; Signal mapping; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering

Print_ISBN

0-7803-7490-8

Type

conf

DOI

10.1109/TENCON.2002.1180276

Filename

1180276