Demodulation communication signals in a near field radio...

Details Demodulation communication signals in a near field radio... Demodulation communication signals in a near field radio...

2011-07-26

2011-07-26

Nguyen, Lee (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Near field

C340S854800, C379S055100

Reexamination Certificate

active

07986916

ABSTRACT:
A near field RF communicator has an IQ demodulator and a demodulator processor that identifies a transition between logical states on the basis of either: 1) a magnitude obtained by adding a first value representing a difference between positive and negative peaks in the in-phase modulation and a second value representing a difference between positive and negative peaks in the quadrature phase modulation; or 2) whether a combined value representing a rate of change in the in-phase modulation and in the quadrature phase modulation exceeds a threshold.

REFERENCES:
patent: 4968970 (1990-11-01), LaPorte
patent: 5815020 (1998-09-01), Allen et al.
patent: 2003/0128070 (2003-07-01), Rizzo et al.
patent: 2 623 311 (1989-05-01), None

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