Combined radar and communications link

Details Combined radar and communications link Combined radar and communications link

2009-12-14

2011-10-25

Sotomayor, John B (Department: 3662)

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

Transmission through media other than air or free space

C342S028000, C342S057000, C342S058000, C342S114000, C340S541000, C340S554000

Reexamination Certificate

active

08044839

ABSTRACT:
In a CW radar system for detecting motion behind a wall involving modulation of the radar transmission, means are provided to interrupt the CW wave when motion is detected and to use the same radar transmitter to transmit a serial digital message to a remote monitoring receiver. The encoding can include a receiver wakeup message to turn on the receiver only when motion has been detected. In one embodiment, a microprocessor is used to detect when motion exists behind a wall and to provide a tailorable message to modulate the radar's transmitter in the period when the CW signal from the radar is turned off after motion detection.

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