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

(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
Subjects: Electrical
Department: College of Engineering and Physics > Electrical Engineering
Depositing User: Obaid-Ur-Rehman Khattak
Date Deposited: 23 Apr 2008 07:45
Last Modified: 01 Nov 2019 13:26
URI: https://eprints.kfupm.edu.sa/id/eprint/1211