Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1992-08-14
1994-04-12
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342196, G01S 1300
Patent
active
053029569
ABSTRACT:
A vehicular collision avoidance radar system using digital signal processing techniques including a transmit section that generates a two channel transmit frequency. An antenna both transmits the transmit signal and receives a reflected receive signal. A Schottky diode mixer generates a difference signal having a frequency equal to the transmit frequency minus the receive frequency. A signal switch in a front end electronics section time demultiplexes and samples the channel 1 and channel 2 signals. The samples are coupled to a two-channel analog to digital (A/D) converter. A digital electronics section receives the digital information and performs a Fast Fourier Transform (FFT) on each channel of digital data to determine relative speed and range of a target based upon the frequency and the difference in phase of the two channels. The digital electronics section also receives information regarding the status of vehicle operation and/or controls to determine the degree of danger presented by an identified target.
REFERENCES:
patent: Re29401 (1977-09-01), Aker et al.
patent: 4110754 (1978-08-01), Endo
patent: 4335383 (1982-06-01), Berry
patent: 4673937 (1987-06-01), Davis
patent: 5181038 (1993-01-01), Asbury et al.
Asbury Jimmie R.
Malan Van R.
Woll Bryan D.
Hellner Mark
Vorad Safety Systems, Inc.
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