Title:
【発明の名称】車両とその前方の障害物との距離および相対速度を測定するためのコンピュータ処理方式レーダ探知方法
Document Type and Number:
Japanese Patent JPH08509059
Kind Code:
A
Abstract:
A signal transmitted using an oscillator is received after reflection from the obstruction. The transmitted and received signals are mixed to derive in-phase and quadrature signals which are processed into output signals for distance and relative speed. During a first measurement, the oscillator is driven with bursts of linearly-increasing frequency and with a number of bursts matching the required resolution. In a second measurement, the oscillator is driven with a linearly reducing frequency. A complex sample value is taken at the end of each reflected burst and mixed with the transmitted transmission signal burst to obtain further values. In a third measurement, the oscillator produces equal frequency bursts and a further complex value taken and distance and speed values derived. The intercept of three curves produced by Fourier transformation indicates a potential obstruction. A fourth measurement is made to eliminate ghost objects.
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Inventors:
Lissel, Ernst
Rolling, hermann
Plage, billfleet
Rolling, hermann
Plage, billfleet
Application Number:
JP51641494A
Publication Date:
September 24, 1996
Filing Date:
December 29, 1993
Export Citation:
Assignee:
ROCKWELL INTERNATIONAL CORPORATION
International Classes:
G01S7/03; G01S13/28; G01S13/34; G01S13/58; G01S13/931; G01S7/288; G01S13/72; (IPC1-7): G01S13/93; G01S13/58; G01S13/34; G01S13/28
Attorney, Agent or Firm:
Fukami Hisaro (3 outside)