Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2011-01-25
2011-01-25
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S150000, C375S324000
Reexamination Certificate
active
07876865
ABSTRACT:
Various embodiments are described herein for a system and method of detecting Automatic Identification System (AIS) signals in space and decoding these signals. In one aspect, a system for performing this function is described which includes a receiver configured to receive the plurality of AIS signals and pre-process the plurality of AIS signals to produce digital input data, and a processing unit configured to process the digital input data to identify one or more candidate AIS message signals based on Doppler offsets associated with the digital input data, determine corresponding Doppler offset estimates and time estimates of the one or more candidate AIS message signals, decode the one or more candidate AIS message signals to obtain corresponding message segments and validate the decoded message segments for proper AIS formatting.
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Bereskin & Parr LLP
Caulder Isis E.
COM DEV International Ltd
Huang David
Liu Shuwang
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