Bit Error Rate Performance of Spread Spectrum Communication Systems for AWGN Channels

,Revathy R,P R Saseendran Pillai

doi:10.35940/ijeat.c4740.029320

Abstract

The digital communication technologies have gained immense significance as it provides secure and error free services. One of the major advantages of digital communication is that they are much resistant to transmitted as well as interpreted errors. For ensuring the security of data, the most suitable method is to use spread spectrum technique. The spread spectrum technique has gained immense popularity for use in various systems as the spreading of the spectral bandwidth offer many advantages, including the establishment of secure communications, increasing resistance to interference, noise rejection, and so on. The signals which are modulated by using these techniques cannot be jammed and are very hard to interfere. This paper presents the results of investigation of BPSK based direct sequence spread spectrum systems for Additive White Gaussian Noise (AWGN) and undersea channels. The bit error rate performance of BPSK based direct sequence spread spectrum systems has been simulated for the AWGN channel and the results have been plotted.

Highlights

For an error free and effective communication to occur, the receiver should be able to receive the exact data sent by the transmitter, even when the signal is buried in high noise fields
Performance of spread spectrum communication systems mainly relies on the factor that, the bandwidth required for the signal transmission should be much larger than the least bandwidth required for information transmission and should be spread by a spreading code which is independent of the data
III.I Simulation of Additive White Gaussian Noise (AWGN) Channel Additive white Gaussian noise (AWGN) is simple noise model used to mimic the effect of random processes

Summary

INTRODUCTION

For an error free and effective communication to occur, the receiver should be able to receive the exact data sent by the transmitter, even when the signal is buried in high noise fields. The interference of the noise signal in the communication channel which can be either intentional or unintentional can reduce its efficiency. In such situations spread spectrum communication [3, 4] can be used for reliable and secure data transmissions, even in a noisy environment. By sending the signal at low power it can be hidden in the channel as noise. This is achieved by spreading the signal energy over the widest bandwidth assessable and by using the less power levels. By way of spreading the signal using the spreading code makes it look like noisy waveforms, this technique offers greater resistance to unintentional and intentional interferences

SYSTEM MODEL

RESULTS AND DISCUSSIONS

III.II Simulation of Undersea Channel Effects

CONCLUSION