Investigations into the Performance Characteristics of Direct Sequence Spread Spectrum in Rayleigh Fading Channe

Rajiv, Mohan David and Kumara, Shama and Nayak, Prabhakar K (2014) Investigations into the Performance Characteristics of Direct Sequence Spread Spectrum in Rayleigh Fading Channe. In: Proceedings of International Conference on Electrical, Communication and Computing, ICECC – 2014, March 13,14 2014, Tagore Engineering College, Rathinamangalam, Chennai – 600 127, India.

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Abstract

Amplitude variations and Intersymbol Interference have become a major limiting factors for Direct Sequence Spread Spectrum (DSSS) in the presence of Rayleigh Fading. In this work we have presented how to encounter Rayleigh fading effects and minimizing the Bit error rate (BER). It is suggested in such a way that without increasing the PN sequence length fading effects can be minimized. This is done by adopting an Least Mean equalizer in cascade to multipath fading. Here we consider a time varying channel which induces Doppler spread in the received signal. The receiver has to be modelled which should overcome the amplitude variations. Amplitude variations are a major limiting factor which can be controlled by means of an equalizer which minimizes the Mean square error . We have considered a Rayleigh Fading AWGN channel which is a zero mean complex Gaussian channel

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Direct Sequence Spread Spectrum (DSSS), Equaliser, Mean Square Error (MSE), Fading, Intersymbol Interference (ISI)
Subjects: Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 19 Mar 2014 09:11
Last Modified: 19 Mar 2014 09:11
URI: http://eprints.manipal.edu/id/eprint/139158

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