Direct Sequence Spread Spectrum with Barker Code and QPSK

Spread Spectrum technique is a digital passband technique. It uses a special code which is known only to the transmitter and receiver of that message. The special code appears as a noise signal to the jammer who tries to jam the channel. In this paper, we present the Direct Sequence Spread Spectrum. Firstly, we show an overview of Direct Sequence Spread Spectrum, then, we simulate Direct Sequence Spread Spectrum using MATLAB. The results of simulation are presented in this paper. We are clearly demonstrating the benefits of Direct Sequence Spread Spectrum in a digital communication system in providing privacy and antijamming. The simulation by MATLAB program simplifies the study, analysis and development of these techniques in modern digital communication networks.