Title :
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
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;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1180276
