Title :
A New Companding Method of the PAR Reduction in Underwater OFDM Communication System
Author :
Yuan, Zhaokai ; Li, Zheng ; Sui, Tianyu ; Li, Yu ; Huang, Haining
Author_Institution :
Inst. of Acoust., Chinese Acad. of Sci., Beijing, China
Abstract :
The high peak-to-average (PAR) power ratio is one of the major problems in orthogonal frequency division multiplexing (OFDM) modulation system. In this paper, we present a new companding transform which is called YL transform. With this method, the distribution of time domain samples is transformed into uniform distribution and the PAR is reduced from 12dB to 4.6dB for 256-channel QPSK OFDM. Furthermore, the YL-Transform is easy to implement and costs less computation which is also can transform any kind of distribution into uniform.
Keywords :
OFDM modulation; compandors; underwater acoustic communication; PAR reduction; companding method; time domain samples; underwater OFDM communication system; uniform distribution; Bit error rate; Communication systems; Gaussian distribution; Peak to average power ratio; Receivers; Transforms;
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
DOI :
10.1109/WICOM.2010.5601206
