RADAR TRANSCEIVER

A radar transceiver may include a noise canceller. The noise canceller may include a phase shifter circuit, a variable gain amplifier, and a coupler circuit. The phase shifter circuit may shift (i) a phase of a modulated signal, (ii) a phase of an original signal, or (iii) a phase of a signal genera...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAMAURA, Shinji, NAKAJIMA, Kensuke
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A radar transceiver may include a noise canceller. The noise canceller may include a phase shifter circuit, a variable gain amplifier, and a coupler circuit. The phase shifter circuit may shift (i) a phase of a modulated signal, (ii) a phase of an original signal, or (iii) a phase of a signal generated by a noise cancellation signal generator circuit having a frequency corresponding to a frequency of a reflected signal which is reflected by an obstacle. The variable gain amplifier may amplify or attenuate a noise cancellation signal. The coupler circuit may couple the noise cancellation signal with a received signal from a receiver. An amplitude of the noise cancellation signal may be controlled by a controller via the variable gain amplifier. A phase shift amount of the noise cancellation signal may be controlled by the controller via the phase shifter circuit.