US 11,901,973 B2Granted

Proximity detection

AssigneeQUALCOMM Incorporated

InventorsSanjay Avasarala, Ryan Scott Castro Spring, Udara Fernando

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Abstract

Certain aspects of the present disclosure provide object detection based on perturbations in a channel model over time. An example portable apparatus includes a primary antenna, a secondary antenna, a transmit path, a radio frequency (RF) coupler, and a receive path. The transmit path is coupled to the primary antenna and configured to output a transmit signal for transmission via the primary antenna. The RF coupler is coupled to the secondary antenna. The receive path has an input selectively coupled between the transmit path and the RF coupler such that when the receive path is coupled to the RF coupler and configured to operate concurrently with the transmit path, the receive path is configured to receive a reflected portion of the transmit signal from an object located in proximity to the portable apparatus.

Claims30

Dependent claims

A portable apparatus for wireless communication, comprising:

a primary antenna;
a secondary antenna;
a transmit path coupled to the primary antenna and configured to output a transmit signal for transmission via the primary antenna;
a first radio frequency (RF) coupler coupled to the secondary antenna;
a receive path having an input selectively coupled between the transmit path and the first RF coupler;
a diversity path, wherein the secondary antenna comprises a diversity antenna and wherein the first RF coupler is a diversity coupler coupled to the diversity path and selectively coupled to the receive path;
a memory;
and
at least one processor coupled to the memory, the at least one processor and the memory being configured to operate the portable apparatus in an object detection mode, which includes the receive path being coupled to the first RF coupler, being configured to operate concurrently with the transmit path, and being configured to receive a reflected portion of the transmit signal from an object located in proximity to the portable apparatus.

6 more elements

Dependencies are inferred from the claim text.