期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2012
卷号：12
期号：4
页码：1-8
出版社：International Journal of Computer Science and Network Security
摘要：High Peak to Average Power Ratio (PAPR) for OFDM system is still a demanding area and difficult issue. The radio transmitter stations for covering and getting enough transmit power in their desired area have to use High Power Amplifier (HPA). On the other hand, in order the HPA have the most output power efficiency must be designed to work close to the saturation region therefore due to the high PAPR of input signals a factor which is called memory-less nonlinear distortion will be come into the communication channels. We know the OFDM receiver��s efficiency is sensitive to the HPA. If the high power amplifier doesn��t work in linear region it can cause the out-of-band power to be kept under the specified limits. This condition can cause inefficient amplification and expensive transmitters, thus it is necessary to investigate PAPR reduction techniques for OFDM system. By now, for reducing PAPR in OFDM systems, numerous techniques have been recommended. In this paper the performance and the efficiency of a number of them will be discussed and evaluated and then we proposed our suggested method for a conventional OFDM system.
关键词：Peak to Average Power Ratio (PAPR); High Power Amplifier (HPA); Orthogonal Frequency Division Multiplexing (OFDM); Clipping and Filtering (CAF)
