US 10,651,957 B2 · Proximity detection using a hybrid transceiver

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.

Claims20

Dependent claims

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.

10 more elements

An apparatus comprising:

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.

2 more elements

A method for operating a hybrid transceiver for proximity detection, the method comprising:

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.

2 more elements

Dependencies are inferred from the claim text.

Proximity detection using a hybrid transceiver

Life of this patent

Proximity detection using a hybrid transceiver

Life of this patent

Abstract

Claims20