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Robust, FFT-Based, Single Carrier, Multiuser, SDPSK/DPSK Block Demodulation in the Presence of Symbol Synchronization Jitter

Masoud, Ahmad A. (2005) Robust, FFT-Based, Single Carrier, Multiuser, SDPSK/DPSK Block Demodulation in the Presence of Symbol Synchronization Jitter. Communications in Information and Systems, 5 (3). pp. 289-304.

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Abstract

In this paper a robust, single carrier, multi-user, DSP-based implementation of an OFDM, differential phase shift keying (DPSK) block demodulator is suggested. It is shown that a direct, DSP-based implementation of the above system using a single FFT symbol is highly susceptible to artifacts induced by symbol timing errors (symbol synchronization jitter, SSJ). A dual symbol, FFT-based implementation is suggested to alleviate the effect of timing error on the demodulation process, even eliminate some of the SSJ-induced artifacts. The countermeasures used in the implementation do not assume any statistical model of SSJ nor are they dependant on a symbol synchronization scheme. Also a dual version of the demodulator is derived for an important, but less known, modulation technique called symmetric DPSK (SDPSK).



Item Type:Article
Date:2005
Date Type:Publication
Subjects:Electrical
Divisions:College Of Engineering Sciences > Electrical Engineering Dept
Creators:Masoud, Ahmad A.
Email:masoud@kfupm.edu.sa
ID Code:1211
Deposited By:Obaid-Ur-Rehman Khattak
Deposited On:23 Apr 2008 10:45
Last Modified:12 Apr 2011 13:08

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