G - Physics – 01 – S
Patent
G - Physics
01
S
343/13
G01S 13/34 (2006.01) G01S 13/93 (2006.01)
Patent
CA 1338479
In a radar system for alerting the vehicle operator of obstacles behind the vehicle when backing up or in front of the vehicle below the operator's line of sight an RF signal is transmitted at a frequency modulated by a sawtooth signal. The transmitted RF signal is mixed with the transmitted signal reflected from an object. The resulting IF signal is analyzed into a Fourier series having a DC coefficient and harmonic frequency coefficients. The range to the object is determined from the harmonic frequency coefficients in multiples of the range resolution determined by the RF bandwidth of the system when the DC coefficient is less than each of the harmonic frequency coefficients. The range to the object is determined to be within 1/2 the range resolution determined by the RF bandwidth when the DC coefficient is greater than each of the harmonic frequency coefficients.
603013
Dunn Douglas L.
Ferry Stephen J.
May Phillip A.
Wen Cheng P.
Delco Electronics Corporation
Gowling Lafleur Henderson Llp
Hughes Aircraft Company
Santa Barbara Research Center
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