DocumentCode :
493157
Title :
A New Method to Reduce the PAPR in the IRA-OFDM System
Author :
Wang, Xiaosong ; Chang, Guiran
Author_Institution :
Comput. Center of Northeastern Univ., Shenyang
Volume :
1
fYear :
2009
fDate :
25-26 April 2009
Firstpage :
715
Lastpage :
718
Abstract :
First, an irregular repeat accumulate (IRA) coded orthogonal frequency division multiplexing (OFDM) system is introduced in this paper. To reduce the peak-to-average power ratio (PAPR) of this system, a balance sequence (BS) is inserted in the information bits. The BS can be determined by exhaustive search in the encoding process. But when the length of the BS is long, the time of searching may increase exponentially with the length and it is not practical for the hardware implementation. Thus a low complexity method to dynamically determine the BS is proposed, which uses A periodic autocorrelation function (AAF) as the metric, and is shown in this paper , Simulation results show that this method can reduce the PAPR of this system effectively.
Keywords :
OFDM modulation; codes; OFDM system; balance sequence; encoding process; irregular repeat accumulate code; orthogonal frequency division multiplexing; peak-to-average power ratio; periodic autocorrelation function; Autocorrelation; Block codes; Computer networks; Decoding; Digital video broadcasting; OFDM; Partial transmit sequences; Peak to average power ratio; Wireless LAN; Wireless communication; Irregular repeat accumulate (IRA) codes; Orthogonal frequency division multiplexing (OFDM); Peak-to average power ratio (PAPR);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Networks Security, Wireless Communications and Trusted Computing, 2009. NSWCTC '09. International Conference on
Conference_Location :
Wuhan, Hubei
Print_ISBN :
978-1-4244-4223-2
Type :
conf
DOI :
10.1109/NSWCTC.2009.63
Filename :
4908363
Link To Document :
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