Title :
Bit error rate improvement for chaos shift keying chaotic communication systems
Author :
Long, M. ; Chen, Yuanfeng ; Peng, Feifei
Author_Institution :
Dept. of Comput. & Commun. Eng., Changsha Univ. of Sci. & Technol., Changsha, China
Abstract :
The bit error rate (BER) performance of chaos shift keying is improved for an additive white Gaussian noise channel by applying a trimming operation to the Chebyshev polynomial function of order 2 and the piecewise linear map to make the input source more Gaussian distributed. Analytical expressions for the improved BER are also derived based on the curve-fitting approximation. Numerical results show that the proposed method can achieve performance gains of up to 3.5 dB in signal-to-noise ratio over the conventional method without trimming.
Keywords :
AWGN channels; Chebyshev approximation; Gaussian distribution; chaotic communication; curve fitting; error statistics; BER; Chebyshev polynomial function; Gaussian distribution; additive white Gaussian noise channel; bit error rate improvement; chaos shift keying; chaotic communication system; curve-fitting approximation; piecewise linear map; signal-to-noise ratio; trimming operation;
Journal_Title :
Communications, IET
DOI :
10.1049/iet-com.2012.0103
