Proximity detection using a hybrid transceiver
First Claim
1. An apparatus comprising:
- a local oscillator;
a transmitter comprising an upconversion mixer, an input of the upconversion mixer coupled to the local oscillator;
a receiver comprising a downconversion mixer; and
downconversion reference selection circuitry comprising;
a first input node coupled to an output of the upconversion mixer;
a second input node coupled to the local oscillator; and
a first output node coupled to an input of the downconversion mixer,the downconversion reference selection circuitry configured to selectively;
connect the first input node to the first output node; and
connect the second input node to the first output node.
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Abstract
An apparatus is disclosed for proximity detection using a hybrid-transceiver. In an example aspect, the apparatus includes a hybrid transceiver coupled to a first antenna and a second antenna. The hybrid transceiver is configured to generate, in a digital domain, a digital baseband radar signal. The hybrid transceiver is also configured to transmit, via the first antenna, a radio-frequency transmit signal that is derived from the digital baseband radar signal. Via the second antenna, the hybrid transceiver is configured to receive a radio-frequency receive signal, which includes a portion of the radio-frequency transmit signal that is reflected by an object. In an analog domain, the hybrid transceiver is configured to generate an analog receive signal that includes a beat frequency, which is indicative of a frequency offset between the radio-frequency transmit signal and the radio-frequency receive signal. The analog receive signal is derived from the radio-frequency receive signal.
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Citations
20 Claims
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1. An apparatus comprising:
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a local oscillator; a transmitter comprising an upconversion mixer, an input of the upconversion mixer coupled to the local oscillator; a receiver comprising a downconversion mixer; and downconversion reference selection circuitry comprising; a first input node coupled to an output of the upconversion mixer; a second input node coupled to the local oscillator; and a first output node coupled to an input of the downconversion mixer, the downconversion reference selection circuitry configured to selectively; connect the first input node to the first output node; and connect the second input node to the first output node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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oscillation means for generating a local oscillator signal; transmission means for upconverting an analog transmit signal using the local oscillator signal to generate an upconverted analog transmit signal, the transmission means coupled to the oscillation means; reception means for downconverting an analog receive signal using a reference signal to generate a downconverted analog receive signal; and downconversion reference selection means for selectively providing, to the reception means, the upconverted analog transmit signal as the reference signal and the local oscillator signal as the reference signal. - View Dependent Claims (11, 12, 13, 14)
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15. A method for operating a hybrid transceiver for proximity detection, the method comprising:
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generating a local oscillator signal; upconverting, via an upconversion mixer of a transmitter, an analog transmit signal using the local oscillator signal to generate an upconverted analog transmit signal; downconverting, via a downconversion mixer of a receiver, an analog receive signal using a reference signal to generate a downconverted analog receive signal; and selectively providing, to the downconversion mixer, the upconverted analog transmit signal as the reference signal based on a proximity detection mode and providing the local oscillator signal as the reference signal based on a wireless communication mode. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification