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Mathematical Problems in Engineering
Volume 2013, Article ID 532653, 7 pages
http://dx.doi.org/10.1155/2013/532653
Research Article

Performance of a SIMO-CDSK System over Rayleigh Fading Channels

1School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2Nanjing Institute of Railway Technology, Nanjing 210031, China
3School of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received 6 September 2013; Revised 24 October 2013; Accepted 3 November 2013

Academic Editor: Hai Yu

Copyright © 2013 Jun-Yi Duan et al. 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

This paper proposes a single-input multiple-output (SIMO) architecture for correlation delay shift keying (CDSK) modulation technique, and the bit error rate (BER) formula is derived under the assumption of the proposed system over Rayleigh fading channels. The new system employs multiple antennas at the receiver end to form a SIMO structure so as to obtain a diversity gain. Theoretical analysis and simulations show that, at a higher signal-to-noise ratio (SNR), the proposed SIMO-CDSK architecture has an outstanding bit error rate (BER) performance in contrast to the conventional single-input single-output (SISO) CDSK and GCDSK communication system; for the given SNR, the diversity gain of the proposed system will be improved with the number of receiver antennas increasing; for different SNRs, the best performance of the proposed system can be obtained by selecting the reasonable spreading factor; because the performance of SIMO-CDSK system is independent of the time delay, the proposed system has better security than GCDSK system.