R. J. Susan
ABSTRACT
Orthogonal Frequency Division Multiple Access (OFDMA) is a multiple access technique that can accommodate many users with widely varying applications, data rates and Quality of Service requirements, with increased spectral efficiency. Peak to Average Power Ratio (PAPR) reduction for OFDMA is motivated by a desire to increase the mean transmit power and to improve the power amplifier efficiency. This paper presents use of chaotic sequences generated using tent map for multiple data rate spreading and PAPR reduction in OFDMA system. Increase in PAPR due to variable spreading could be reduced by spreading using chaotic sequences. Chaotic sequences gave constant PAPR values for different combinations of data rates. It was also noted that the sequences could be chosen irrespective of the data rates used. Bit error rate was found to be comparable with that for Orthogonal Variable Spreading Factor codes.
- Jiang, T. and Wu, Y. 2008. An overview: Peak to average power reduction techniques for OFDM signals. IEEE Transactions on Broadcasting. 54, 2 (June 2008), 258--268.Google Scholar
- Han, S. H. and Lee, J. H. 2005. An overview of peak to average power ratio reduction techniques for multicarrier transmission. IEEE Wirel. Commun. (April 2005), 56--65. Google ScholarDigital Library
- Husain, I., Husain, S., Khokhar, I. and Iqbal, R. 2007. OFDMA as a technology for the next generation mobile and the Internet. In Proc. of the third international conference on Wireless and mobile communication (Guadeloupe, French Carribean, March 4--9, 2007). 14--14. DOI=http://ieeexplore.ieee.org/10.1109/ICWMC.2007.58 Google ScholarDigital Library
- Susan, R. J. and Pillai, S. S. 2008. Performance analysis of OFDMA system with multiple data rate in Rayleigh fading channel. In Proc. Fourth International conference on Wireless Communication and sensor networks (Allahabad, India, Dec. 27--29, 2008), 253--256. DOI = http://ieeexplore.ieee.org/10.1109/WCSN.2008.4772702Google Scholar
- Ochiai, H. and Imai, H. 1998. OFDM CDMA with peak power reduction based on the spreading sequences. In Proc. IEEE International conference on Communications (1998), 1299--1303. DOI = http://ieeexplore.ieee.org/10.1109/ICC.1998.683035Google Scholar
- Heidari-Bateni, G. and McGillem, C. D. 1994. A Chaotic direct sequence spread spectrum communication system. IEEE Trans. Commun. 42, 2/3/4 (1994), 1524--1527.Google ScholarCross Ref
- Xing-Yuan, W. and Qing, Y. 2009. A block encryption algorithm based on dynamic sequences of multiple chaotic systems. Communications in Nonlinear Science and Numerical Simulation. 14 (2009), 574--581.Google ScholarCross Ref
- Rajakumar, R., Revathi, M., Sampath, A. and Indumathi, P. 2010. Secure Communication using chaos in multiple access environment. In Proc. 8th WSEAS international conference on Applied Electromagnetics, Wireless and Optical Commun. (Penang, Malaysia, March 23--25, 2010) 15--19. Google ScholarDigital Library
- Susan, R. J. and Pillai, S. S. 2010. Frequency Domain Equalisation for OFDMA System in Multipath Fading channels. In Recent Trends in Networks and Communications, N. Meghanathan, S. Boumerdassi, N. Chaki, D. Nagamalai, Eds. CCIS, Springer-Verlag, Berlin, Heidelberg, 369--377. DOI=http://www.springerlink.com/10.1007/978-3-642-14493-6_38.Google Scholar
Index Terms
- PAPR reduction using tent map for multiple data rate OFDMA system
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