Demodulation technique for GFSK and DPSK
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United States of America Patent
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Jan 3, 2012
Grant Date -
Nov 22, 2007
app pub date -
May 4, 2007
filing date -
May 4, 2006
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Abstract
A technique for low-complexity high-performance coherent demodulation of GFSK signals involves utilizing a novel phase and frequency tracking mechanism coupled with a trellis search technique to track signal memory in the demodulation process. A method according to the technique may include modeling modulation based upon a trellis. The method may further include estimating unknown parameters, selecting a maximum likelihood path through the trellis, and mapping the maximum likelihood path to an output bit sequence. The technique is also applicable to DSPK and other applicable known or convenient protocols.
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