Signal decoding method and apparatus with dynamic noise...

Details Signal decoding method and apparatus with dynamic noise... Signal decoding method and apparatus with dynamic noise...

2007-06-12

2009-10-27

Torres, Juan A (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C329S304000, C329S306000

Reexamination Certificate

active

07609784

ABSTRACT:
An apparatus and method for use by a receiver in decoding information sent by phase-shift keying over a carrier frequency for use with power line carrier (PLC) applications as it is adapted to appropriately position the sampling window based on a zero crossing of one of the phases of the power line. The method allows for receipt and processing of information on more than one carrier frequency and from transmitters operating on a phase of the power line that is different than the phase used by alternating current at the power grid frequency on the receiver to detect the zero crossings of the power line. Optionally, a threshold parameter may be dynamically adjusted in reaction to the underlying level of noise so as to reduce the number of bursts carrying actual data that are discarded as having only noise. A number of alternative embodiments are included.

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