Radar detection circuit for a WLAN transceiver

Details Radar detection circuit for a WLAN transceiver Radar detection circuit for a WLAN transceiver

2010-04-19

2011-12-20

Lobo, Ian (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Combined with diverse type radiant energy system

C342S020000, C342S089000

Reexamination Certificate

active

08081104

ABSTRACT:
A single chip radio transceiver includes circuitry that enables detection of radar signals to enable the radio transceiver to halt communications in overlapping communication bands to avoid interference with the radar transmitting the radar pulses. The radio transceiver is operable to evaluate a number of most and second most common pulse interval values to determine whether a traditional radar signal is present. The radio transceiver also is operable to FM demodulate an incoming signal to determine whether a non-traditional radar signal, such as a bin-5 radar signal, is present. After FM demodulation, the signal is averaged wherein a substantially large value is produced for non-traditional radar signals and a value approximately equal to zero is produced for a communication signal that is not FM modulated with a continuously increasing frequency signal. Gain control is used to limit incoming signal magnitude to a specified range of magnitudes.

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