NDLI: Synchronization of Frequency Hopping DPSK Signals

Content Provider	IEEE Xplore Digital Library
Author	Woo, K.T.
Copyright Year	1982
Description	Author affiliation: ELECTRONICS SYSTEMS GROUP, TRW DEFENSE AND SPACE, REDONDO BEACH, CALIF. 90278 (Woo, K.T.)
Abstract	The time synchronization problem of frequency hopping DPSK signals is considered in this paper. Before DPSK data can be properly demodulated by the receiver several dimensions of time synchronization must first be achieved. These include the acquisition and tracking of the frequency hop time epoch, symbol synchronization of the DPSK data stream, and the frame synchronization which involves the determination of the first DPSK bit within each hop period. Two symbol sync structures for DPSK signals, with and without data aiding, are first discussed. They are optimal in the Gaussian noise channel in the sense that they are both motivated by maximum a posteriori (MAP) estimation theory. Methods for acquiring the frequency hop time and its tracking for this type of signal, as well as the determination of the first DPSK symbol in each hop, are next discussed. The effect of symbol sync error on the probability of DPSK detection error is analyzed. Numerical results showing the bit error as a function of both fixed and random symbol sync error are given.
File Size	610396
File Format	PDF
DOI	10.1109/MILCOM.1982.4805931
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1982-10-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency synchronization Differential quadrature phase shift keying Clocks Estimation theory Tracking loops Spread spectrum communication System performance Gaussian noise Error analysis Frequency conversion
Content Type	Text
Resource Type	Article

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