Share Email Print

Proceedings Paper

PAPR reduction in synchronous CI/MC-CDMA uplink system using genetic algorithms
Author(s): Sumanta Hati; Santi P. Maity
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Main disadvantage of a multicarrier communication system is high peak to average power ratio (PAPR) of the transmitted signal. The high PAPR causes the performance degradation due to nonlinear distortion in the high power amplifier (HPA). PAPR value is closely depends on transmitted power and correlation properties of the user’s spreading code. High peak and low average value of the transmitted power increases the PAPR. On the other side high auto correlation function (ACF) value and low cross correlation function (CCF) value of the spreading code also increases the PAPR. But to eliminate the multiple access interference (MAI) in receiver end, ACF should be peak and CCF should be posses zero for all time shifts. So, there is a conflicting nature of PAPR and bit error rate (BER). That’s why an exhaustive effort has been made in this paper for proper distribution of transmitted power within an acceptable range of peak transmitted power and evaluates the new spreading codes using Genetic Algorithms (GA). In general, to obtain optimum PAPR reduction using GA, total searching time to find out the proper amplitude and phase parameters must be accomplished. Simulation results show that PAPR and BER performance using this proposed technique is better than conventional network.

Paper Details

Date Published: 28 January 2013
PDF: 9 pages
Proc. SPIE 8760, International Conference on Communication and Electronics System Design, 87600F (28 January 2013); doi: 10.1117/12.2010343
Show Author Affiliations
Sumanta Hati, Bengal Engineering and Science Univ. (India)
Santi P. Maity, Bengal Engineering and Science Univ. (India)

Published in SPIE Proceedings Vol. 8760:
International Conference on Communication and Electronics System Design
Vijay Janyani; M. Salim; K. K. Sharma, Editor(s)

© SPIE. Terms of Use
Back to Top