Title :
An improved multiple access chaotic communication system using orthogonal chaotic vectors
Author :
Venkatesh, S. ; Singh, Poonam
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Rourkela, India
Abstract :
The small yet non-zero cross-correlation between chaotic spreading sequences in multi user chaotic communication system leads to MAI. The effect of MAI increases as the number of users increases. In order to eliminate the effect of MAI we propose the use of Orthogonal Chaotic Vectors (OCV) as spreading sequences to modulate the message data. At the receiver a simple correlator type detector is used. Analytical expressions for BER are derived for both AWGN and fading channels are compared with that of simulation results.
Keywords :
AWGN channels; chaotic communication; error statistics; fading channels; interference suppression; multi-access systems; radiofrequency interference; sequences; AWGN channels; BER; MAI effect elimination; chaotic spreading sequences; correlator type detector; fading channels; improved multiple access chaotic communication system; multiple access interference suppression; multiuser chaotic communication system; nonzero cross-correlation; orthogonal chaotic vectors; AWGN; Chaotic communication; Coherence; AWGN; chaos; fading channels; gram-schimdt orthonormalisation; orthogonal chaotic vector (OCV); orthogonal chaotic vector shift keying (OCVSK);
Conference_Titel :
Communications and Signal Processing (ICCSP), 2011 International Conference on
Conference_Location :
Kerala
Print_ISBN :
978-1-4244-9798-0
DOI :
10.1109/ICCSP.2011.5739404
