Multichannel radar system for motor vehicles
First Claim
1. A multichannel radar system for use on a motor vehicle, comprising:
- a plurality of transmission and reception channels each composed of an AM signal generator for generating an AM signal including a carrier which is amplitude-modulated by a modulation signal, an antenna for radiating the generated AM signal and receiving a return signal reflected by an obstacle, an amplifier for amplifying the received return signal, and a detector for detecting the amplified return signal;
a power supply for supplying DC voltages respectively to the AM signal generators and the amplifiers of the respective transmission and reception channels in a time-division multiplex manner at successive times; and
a range calculator for calculating a distance up to the obstacle based on the phase difference between the detected return signals and the modulation signals in the respective transmission and reception channels.
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Accused Products
Abstract
A multichannel radar system for use on a motor vehicle has a plurality of transmission and reception channels each composed of an AM or FM signal generator for generating an AM or FM signal including a carrier which is amplitude- or frequency-modulated by a modulation signal, transmission and reception antennas for radiating the generated AM signal and receiving a return signal reflected by an obstacle, an amplifier for amplifying the received return signal, and either a detector for detecting the amplified return signal or a mixer for mixing the amplified return signal with the FM signal generated by the FM signal generator thereby to generate a beat signal. A power supply circuit supplies DC voltages respectively to the AM or FM signal generators and the amplifiers of the respective transmission and reception channels in a time-division multiplex manner at successive times. A processor calculates a distance up to the obstacle based on either the phase difference between the detected return signals and the modulation signals or the frequencies of the beat signals in the respective transmission and reception channels.
22 Citations
10 Claims
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1. A multichannel radar system for use on a motor vehicle, comprising:
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a plurality of transmission and reception channels each composed of an AM signal generator for generating an AM signal including a carrier which is amplitude-modulated by a modulation signal, an antenna for radiating the generated AM signal and receiving a return signal reflected by an obstacle, an amplifier for amplifying the received return signal, and a detector for detecting the amplified return signal; a power supply for supplying DC voltages respectively to the AM signal generators and the amplifiers of the respective transmission and reception channels in a time-division multiplex manner at successive times; and a range calculator for calculating a distance up to the obstacle based on the phase difference between the detected return signals and the modulation signals in the respective transmission and reception channels. - View Dependent Claims (2, 3, 4)
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5. A multichannel radar system for use on a motor vehicle, comprising:
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a plurality of transmission and reception channels each composed of an FM signal generator for generating an FM signal including a carrier which is frequency-modulated by a modulation signal, an antenna for radiating the generated FM signal and receiving a return signal reflected by an obstacle, an amplifier for amplifying the received return signal, and a mixer for mixing the amplified return signal with the FM signal generated by said FM signal generator thereby to generate a beat signal; a power supply for supplying DC voltages respectively to the FM signal generators and the amplifiers of the respective transmission and reception channels in a time-division multiplex manner at successive times; and a range calculator for culculating a distance up to the obstacle based on the frequencies of the beat signals in the respective transmission and reception channels. - View Dependent Claims (6, 7, 8)
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9. A multichannel radar system for use on a motor vehicle, comprising:
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a plurality of transmission and reception channels each composed of a signal generator for generating a signal including a carrier which is modulated by a modulation signal, an antenna for radiating the generated signal and receiving a return signal reflected by an obstacle, an amplifier for amplifying the received return signal, and a detector for detecting the amplified return signal; a power supply for supplying DC voltages respectively to the signal generators and the amplifiers of the respective transmission and reception channels in a time-division multiplex manner at successive times; and a processor for processing the detected return signals and the modulation signals in the respective transmission and reception channels to determine a distance up to the obstacle. - View Dependent Claims (10)
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Specification