Communications: directive radio wave systems and devices (e.g. – Plural radar
Reexamination Certificate
2005-02-15
2005-02-15
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Plural radar
C342S082000, C342S128000, C342S175000, C342S195000
Reexamination Certificate
active
06856276
ABSTRACT:
Systems and methods are described for HF radar frequency sharing with GPS time modulation multiplexing. A method is provided that includes generating clock signals from the time information contained in a GPS signal. Radio frequency signals are transmitted and received in a sequence whose start times are dictated by the clock signals. The clock signals also control the modulation of the radio frequency signals. The radio frequency signals are modulated by using a sweep modulation. An apparatus to implement the method includes a GPS receiver, a state machine, a clock generator, a microprocessor, a memory chip, a signal synthesizer, and a digital data output device. The GPS receiver extracts time information from GPS signals. The state machine controls radar functions versus time. The microprocessor performs modulation multiplexing on radar signals.
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Barrick Donald E.
Lilleboe Peter M.
Teague Calvin C.
Codar Ocean Sensors, Ltd.
Fulbright & Jaworski LLP
Gregory Bernarr E.
LandOfFree
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