Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1994-10-24
1996-05-14
Tudor, Harold J.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342 21, 342130, 342194, 342195, 342201, G01S 1302
Patent
active
055171974
ABSTRACT:
A modular radar system using both FM/CW and pulse waveforms for automotive collision avoidance applications. The radar system comprises a transmit and a receive antenna for transmitting and receiving, respectively, either one of FM/CW waveform and pulse waveform, a voltage-controlled oscillator (VCO) for generating a pre-set waveform for the transmit antenna, a modulator for modulating the pre-set waveform of the VCO, a switch for allowing the pre-set waveform from the VCO to be transmitted for a predetermined interval so as to generate the pulse waveform, a timing generator for causing the modulator to execute through a pre-set sequence of frequencies for either one of the pulse and FM/CW modes of waveforms with the timing generator controlling the transmission of one of the FM/CW waveform and pulse waveform, a balanced mixer for signal conversion In both FM/CW and pulse modes, an IF/Baseband receiver for amplifying the received FM/CW waveform and for IF-amplifying the received pulse waveform to generate an in-phase and a quadrature baseband output, a coherent oscillator for generating a coherent oscillating signal of a predetermined frequency to the receiver for centering the IF-amplified received pulse waveform at the predetermined frequency during pulse mode, and a frequency control loop for causing the VCO to maintain an offset by a predetermined frequency in the pulse mode between receive and transmit.
REFERENCES:
patent: 4308536 (1981-12-01), Sims, Jr. et al.
patent: 5130714 (1992-07-01), Taylor
patent: 5134411 (1992-07-01), Adler
patent: 5268692 (1993-12-01), Grosch et al.
Algeo Jerry A.
Chen Pileih
Linstrom Russell H.
Waineo Douglas K.
Wong Sam H.
Arthur David J.
Montanye George A.
Rockwell International Corporation
Tudor Harold J.
Yu Philip K.
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