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Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 956191, 14 pages
http://dx.doi.org/10.1155/2012/956191
Research Article

A Novel Detection Scheme for EBPSK System

School of Information Science & Engineering, Southeast University, Sipailou 2, Nanjing 210096, China

Received 5 September 2012; Revised 21 October 2012; Accepted 23 October 2012

Academic Editor: Wuquan Li

Copyright © 2012 Xianqing Chen and Lenan Wu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We introduce the extended binary phase shift keying (EBPSK) communication system which is different from traditional communication systems by using a special impacting filter (SIF) for demodulation. The joint detection technique is applied at the demodulator side in order to improve the performance of the system under intersymbol interference (ISI). The main advantage of the joint detection technique, when compared to conventional threshold approaches, lies in its ability to use the amplitude and the correlation between neighboring bits, thus significantly improving performance, with low complexity. Moreover, we concentrate not only on increasing the bit rate of the system, but also on designing a bandwidth efficient communication system. Simulation results show that this new approach significantly outperforms the conventional method of using threshold decision by from 3.5 to 5 dB. The new system also occupies a narrower bandwidth. So joint detection is an effective method for EBPSK demodulation under ISI.