Detection and estimation of radio frequency variations

Telecommunications – Transmitter and receiver at separate stations – Having diverse art device

Reexamination Certificate

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Details

C342S013000, C342S020000, C324S076110

Reexamination Certificate

active

07747222

ABSTRACT:
A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts.

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