Implementation of Direct Sequence Spread Spectrum using MATLAB

Abstract

Abstract

A major concern in the design of communication system is to provide secure communication. The system may be required to provide a form of secure communication in a hostile environment such that transmitted signal is not easily detected or recognized by unwanted listeners. This requirement is fulfilled by signaling techniques known collectively as spread spectrum modulation. The main advantage of spread spectrum communication system is its ability to reject interference whether it is the unintentional interference or intentional interference of another user simultaneously attempting to transmit through the channel or hostile transmitter attempting to jam the transmission. The spread spectrum signals are used for suppressing the effects of interference due to jamming, interference arising from other users of the channel and self-interference due to multipath propagation. Hiding the signal by transmitting to low power and thus making it difficult for an unintended listener to detect in the presence of background noise. Achieving messaging privacy in the presence of other listeners.

Keywords: Spreading, despreading, direct sequence spread spectrum