DocumentCode :
3370549
Title :
Constellation shifting based on QAM with gray coding for PAPR reduction of OFDM systems
Author :
Yijun Shi ; Dazhi He ; Wei Huang ; Yin Xu ; Yunfeng Guan ; Jun Sun
fYear :
2013
fDate :
5-7 June 2013
Firstpage :
1
Lastpage :
3
Abstract :
High PAPR has long been a main drawback of OFDM systems. With the lengthening of OFDM symbol and the increasing popularity of high-order modulation, such as OFDM symbol size of 32768 and 256-QAM in DVB-T2, reducing PAPR is of growing importance. In this paper, a constellation shifting technique based on QAM with gray coding will be introduced to reduce PAPR. This technique keeps the minimum Euclidean distance of the constellation points and gray coding´s benefit, costs no extra bandwidth, and consumes little extra power.
Keywords :
Gray codes; OFDM modulation; digital video broadcasting; modulation coding; quadrature amplitude modulation; DVB- T2; OFDM system; PAPR reduction; QAM; constellation shifting technique; gray coding; high-order modulation; minimum Euclidean distance; Digital video broadcasting; Encoding; Euclidean distance; Frequency-domain analysis; Peak to average power ratio; Quadrature amplitude modulation; Constellation shifting; Gray coding; OFDM; Peak-to-average power ratio; QAM;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2013 IEEE International Symposium on
Conference_Location :
London
ISSN :
2155-5044
Type :
conf
DOI :
10.1109/BMSB.2013.6621730
Filename :
6621730
Link To Document :
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