Title :
Chaotic sequences for reduction of PAPR in OFDMA system
Author :
Susan, R.J. ; Pillai, Sakuntala S.
Author_Institution :
Dept. of Electron. & Commun., Coll. of Eng., Thiruvananthapuram, India
Abstract :
In wireless communication, the physical layer should facilitate multiuser, multirate transmission to support large number of users and applications with diverse needs. In this work chaotic sequences generated using logistic map were used to achieve multiple data rate in Orthogonal Frequency Division Multiple Access (OFDMA) system. Performance was compared with that of Orthogonal Variable Spreading Factor (OVSF) code. Increase in Peak to average power ratio (PAPR) due to variable spreading could be reduced by spreading using chaotic sequences. The spreading sequences could be chosen irrespective of the data rates used. It was also observed that chaotic sequences gave constant PAPR values for different combinations of data rates. Bit error rate was found to be comparable with that for OVSF codes.
Keywords :
OFDM modulation; chaotic communication; error statistics; frequency division multiple access; OFDMA system; OVSF code; PAPR reduction; bit error rate; chaotic sequences; constant PAPR values; logistic map; multiuser multirate transmission; orthogonal frequency division multiple access; orthogonal variable spreading factor code; peak-to-average power ratio; spreading sequences; wireless communication; Bit error rate; Chaotic communication; Correlation; Peak to average power ratio; Wireless communication; Multiple data rate; OFDMA; PAPR; chaotic sequences;
Conference_Titel :
India Conference (INDICON), 2011 Annual IEEE
Conference_Location :
Hyderabad
Print_ISBN :
978-1-4577-1110-7
DOI :
10.1109/INDCON.2011.6139433
