Barkha Pandey, Raghu Harsh Kalia, Monica Kaushik, Monika Arora
Additive White Gaussian Noise, Bandwidth Efficiency, Binary Phase Shift Keying, Bit Error Rate, Direct Sequence-Code Division Multiple Access, Extended BPSK, Modulation.
|PUBLISHED DATE||December 2016|
|PUBLISHER||The Author(s) 2016. This article is published with open access at www.chitkara.edu.in/publications|
In a last few decades there has been tremendous growth and a drastic rise in wireless communication technologies. The major issue that the world is facing today with the advent of so many sophisticated wireless communication devices is efficient utilization of the spectrum. Spectrum efficiency comes together with a tradeoff factor of energy consumption. Thus, the need of the hour is an energy and bandwidth efficient technique. DS-CDMA is one of the competitive and most investigated technique in wireless communication which caters the large demand at the same time with limited bandwidth. Existing modulation techniques does not promise to provide better performance in case of higher noise. Therefore, one looks for a better BER stipulated modulation format to improve and enhance the performance of the system. This article revisits conventional Binary phase shift keying method and compares its performance in terms of BER with a special Extended Binary Phase Shift Keying (EBPSK) modulation format for a DS- CDMA system. EBPSK scheme is flexible and simple which is easily integrated in a network and assures improved and enhanced performance.
Section II re-considers the BPSK modulation scheme and introduces the EPBPSK modulation method and its explanation. Section III takes up BER (bit error rate) as a parameter for measuring the performance of DS-CDMA system with two different modulation formats (BPSK & EBPSK)
|ISSN||Print : 2321-3906, Online : 2321-7146|
In this paper we have addressed a number of advantages of EBPSK scheme for the present day scenario of Wireless Communication. EBPSK method promises to provide lesser energy consumption and better spectral efficiency. However, this work has taken up conventional BPSK modulation scheme and compared its BER performance with special extended BPSK scheme for a DS-CDMA system. The reviewed literature and simulated results shows better performance of EBPSK scheme for a DS-CDMA system. The simulated results depict that there is a significant improvement in the BER performance at higher values of Eb/No. It is a technique which is simple to implement and provides better BER operation with few changes in representation of Bit “1” and “0”.