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Paper details
Number 3 - September 2008
Volume 18 - 2008
Application of triple correlation and bispectrum for interference immunity improvement in telecommunications systems
Pavel Molchanov, Alexandr Totsky
Abstract
This paper presents a new noise immunity encoding/decoding technique by using the features of triple correlation and bispectrum widely employed in digital signal processing systems operating in noise environments. The triple correlation- and bispectrum-based encoding/decoding algorithm is tested for a digital radio telecommunications binary frequency shift keying system. The errorless decoding probability was analyzed by means of computer simulation for the transmission and reception of a test message in a radio channel disturbed by both additive white Gaussian noise (AWGN) and a mixture of an AWGN and an impulsive noise. Computer simulation results obtained for varying and less than unity signal-to-noise ratios at the demodulator input demonstrate a considerable improvement in the noise immunity of the technique suggested in comparison with the traditional redundant linear block encoding/decoding technique.
Keywords
telecommunications, frequency shift keying, redundant encoding, triple correlation, bispectrum