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Proceedings Paper

Combined differential demodulation schemes for satellite-based AIS with GMSK signals
Author(s): Zhensheng Zhang; John Weinfield; Tarun Soni
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Paper Abstract

The paper presents a set of new demodulation algorithms for use in satellite systems to receive Automatic Identification System (AIS) signals, with the potential presence of other interfering signals. The combined differential demodulation scheme, referred to as CDD-n, combines n single differential demodulation schemes with appropriately selected weights. Simulation results indicate that the gain under the proposed demodulation scheme is up to 10 dB over several existing non-coherent, single differential demodulation schemes. The impact of the combination coefficients/weights, the number of single differential detectors used, the low pass filter used, the interference and phase shift on the performance are evaluated through simulation, respectively. The proposed demodulation schemes are simple and easy to implement in satellite receivers in current and future satellite networks.

Paper Details

Date Published: 7 May 2010
PDF: 12 pages
Proc. SPIE 7691, Space Missions and Technologies, 76910C (7 May 2010); doi: 10.1117/12.848785
Show Author Affiliations
Zhensheng Zhang, Argon ST, Inc. (United States)
John Weinfield, Argon ST, Inc. (United States)
Tarun Soni, Argon ST, Inc. (United States)

Published in SPIE Proceedings Vol. 7691:
Space Missions and Technologies
Joseph Lee Cox; Manfred G. Bester; Wolfgang Fink, Editor(s)

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