Dual mode automobile collision avoidance radar
First Claim
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1. In a system for detecting the presence and range of a remote object from a probe station, said probe station transmitting modulating probe signals in a given direction, said object being of the class comprising cooperative targets having means for receiving probe signals and radiating return signals having a characteristic indicia and non-cooperating targets serving to reflect said probe signals as return signals, said probe station comprising:
- means for generating said modulated probe signals including means for generating a sample signal indicative of said probe signal;
means, receptive of said return signals and said sample signal, for generating a difference signal having distinguishable components indicative of return signals from said cooperative objects and of return signals from said non-cooperative objects; and
means, responsive to said difference signals, for generating a signal indicative of the range between said probe station and said cooperative objects, and the range between said probe station and said non-cooperative objects for all ranges not exceeding a predetermined value.
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Abstract
A frequency-modulated continuous-wave collision avoidance radar responsive to both reply signals from cooperating (tagged) targets and to skin reflections from proximate non-cooperating (non-tagged) targets.
84 Citations
6 Claims
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1. In a system for detecting the presence and range of a remote object from a probe station, said probe station transmitting modulating probe signals in a given direction, said object being of the class comprising cooperative targets having means for receiving probe signals and radiating return signals having a characteristic indicia and non-cooperating targets serving to reflect said probe signals as return signals, said probe station comprising:
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means for generating said modulated probe signals including means for generating a sample signal indicative of said probe signal; means, receptive of said return signals and said sample signal, for generating a difference signal having distinguishable components indicative of return signals from said cooperative objects and of return signals from said non-cooperative objects; and means, responsive to said difference signals, for generating a signal indicative of the range between said probe station and said cooperative objects, and the range between said probe station and said non-cooperative objects for all ranges not exceeding a predetermined value. - View Dependent Claims (2)
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3. A system for detecting and ranging cooperating and non-cooperating targets, comprising:
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first means for transmitting a modulated RF signal as a probe signal, in a given direction; second means for receiving reply signals from said cooperating targets derived by said cooperating targets from said probe signal and skin reflections from non-cooperating targets, said reply signals being distinguishable from said skin reflections; third means, receptive of said reply signals, said skin reflections and sample signal indicative of said probe signal, for deriving a difference signal having components indicative respectively of differences between said sample signal and reply signals and of differences between said sample signal skin reflections; and fourth means, receptive of said difference signal, for generating output signals indicative of targets within one of a first category of targets and a second category of targets, said first category of targets consisting of said cooperating targets, said second category of targets consisting of non-cooperating targets within a predetermined distance of said system. - View Dependent Claims (4, 5, 6)
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Specification