Conference on Advances in Communication and Control Systems 2013 (CAC2S 2013) Performance Analysis of Spread Spectrum Techniques Astha Singh1 Faculty Electronics Engg. Dept. Dr. Ambedkar Institute Of Technology For Handicapped Kanpur (UP), India
[email protected] Abstract In this paper we had analyzed the spread spectrum techniques in a broader sense, in context of their performance. Spread spectrum is an increasingly important form of encoding for wireless communications. It can be used to transmit either analog or digital data, using an analog signal. The basic idea of spread spectrum is to modulate the signal so as to increase significantly the bandwidth (spread the spectrum) of the signal to be transmitted. It was initially developed for military and intelligence requirements. The use of spread spectrum makes jamming and interception more difficult and provides improved reception. Keywords: SS, DSSS, FHSS, BPSK, SFH, FFH. A despreading operation reconstitutes the information into its 1. INTRODUCTION original bandwidth. Obviously, the same code must be known in advance at both ends of the transmission channel. (In some circumstances, the code should be known only by those two Spread spectrum technology has blossomed from a military parties.) technology into one of the fundamental building blocks in current and next-generation wireless systems. From cellular to cordless to wireless LAN (WLAN) systems, spectrum is a vital component in the system design process. Since spread-spectrum is such an integral ingredient, it's vital for designers to have an understanding of how this technology. Fig2: Spread-spectrum communication system. Spread-spectrum transmitters use similar transmit power levels to narrowband transmitters.