Adjacent channel interference mitigation for ultra-wideband systems

Patent metadata

Field	Value
Publication number	US-12489534-B2
Application number	US-202318332623-A
Country	US
Kind code	B2
Filing date	Jun 9, 2023
Priority date	Jun 9, 2023
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

This disclosure provides methods, components, devices and systems for adjacent channel interference (ACI) mitigation techniques for ultra-wideband (UWB) systems. Some aspects more specifically relate to ACI mitigation for UWB systems. In some implementations, a wireless communication device may receive control information that identifies a preamble for communications to the wireless communication device in a UWB system. The wireless communication device may receive, via a signal in the UWB system, a data packet that includes the preamble. The wireless communication device may estimate a channel impulse response (CIR) of the signal and determine an interference metric that is based on the estimated CIR. The wireless communication device may process the data packet based on the interference metric.

First claim

What is claimed is:

1 . An apparatus for wireless communication at a wireless communication device, comprising:
at least one processor; at least one memory coupled with the at least one processor; and instructions stored in the at least one memory and executable by the at least one processor to cause the apparatus to:
receive control information that identifies a preamble for communications to the wireless communication device in an ultra-wideband system;
receive, via a signal in the ultra-wideband system, a data packet that includes the preamble;
determine an interference metric that is based at least in part on an estimated channel impulse response of the signal; and
process the data packet based at least in part on the interference metric.

2 . The apparatus of claim 1 , wherein the instructions to determine the interference metric are executable by the at least one processor to cause the apparatus to:
estimate the channel impulse response of the signal across the preamble of the data packet, wherein the interference metric is based at least in part on the channel impulse response.

3 . The apparatus of claim 2 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
determine a signal to interference plus noise ratio across the preamble of the data packet, wherein processing the data packet is based at least in part on the interference metric and the signal to interference plus noise ratio.

4 . The apparatus of claim 3 , wherein the instructions to process the data packet are executable by the at least one processor to cause the apparatus to:
demodulate a post-preamble portion of the data packet based at least in part on a value of the interference metric not satisfying an interference threshold, a value of the signal to interference plus noise ratio satisfying a signal to interference plus noise ratio threshold, or both.

5 . The apparatus of claim 3 , wherein the instructions to process the data packet are executable by the at least one processor to cause the apparatus to:
refrain to demodulate a post-preamble portion of the data packet based at least in part on a value of the interference metric satisfying an interference threshold, a value of the signal to interference plus noise ratio not satisfying a signal to interference plus noise ratio threshold, or both.

6 . The apparatus of claim 5 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
monitor for one or more additional data packets that include the preamble based at least in part on refraining to demodulate the post-preamble portion of the data packet.

7 . The apparatus of claim 3 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
process one or more post-preamble portions of the data packet; and output an indication of the estimated channel impulse response, or a value of the signal to interference plus noise ratio, or both, for use by an application of the wireless communication device in a determination of whether to drop the data packet.

8 . The apparatus of claim 2 , wherein the preamble of the data packet comprises one or more symbols of a synchronization field.

9 . The apparatus of claim 2 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
determine that a value of the interference metric satisfies an interference threshold; and determine a first value of a signal to interference plus noise ratio across a portion of the preamble of the data packet based at least in part on the value of the interference metric satisfying the interference threshold, wherein processing the data packet is based at least in part on the first value of the signal to interference plus noise ratio.

10 . The apparatus of claim 9 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
determine that the first value of the signal to interference plus noise ratio fails to satisfy a signal to interference plus noise ratio threshold; and refrain to demodulate a post-preamble portion of the data packet based at least in part on the first value of the signal to interference plus noise ratio not satisfying the signal to interference plus noise ratio threshold.

11 . The apparatus of claim 9 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
determine that the first value of the signal to interference plus noise ratio satisfies a signal to interference plus noise ratio threshold; initiate a timer in response to the value of the interference metric satisfying the interference threshold; and refrain to demodulate a post-preamble portion of the data packet based at least in part on the first value of the signal to interference plus noise ratio satisfying the signal to interference plus noise ratio threshold and a duration of the timer satisfying a time threshold.

12 . The apparatus of claim 9 , wherein the portion of the preamble of the data packet comprises one or more symbols of the preamble.

13 . The apparatus of claim 1 , wherein the instructions to determine the interference metric are executable by the at least one processor to cause the apparatus to:
sample the estimated channel impulse response to obtain a plurality of taps, wherein each tap of the plurality of taps corresponds to a magnitude of the estimated channel impulse response at a respective time instance; select a first tap from the plurality of taps, wherein a value of the first tap is greater than a respective value of each remaining taps of the plurality of taps; select a second tap from among the second tap and a third tap of the plurality of taps, wherein the second tap and the third tap are adjacent to the first tap in time, and wherein a value of the second tap is greater than a value of the third tap; and determine the interference metric based at least in part on the first tap and the second tap.

14 . The apparatus of claim 13 , wherein the interference metric is based at least in part on a phase difference between the first tap and the second tap.

15 . The apparatus of claim 13 , wherein a duration between the first tap and the second tap comprises half of a chip duration.

16 . The apparatus of claim 1 , wherein the apparatus comprises a plurality of antennas, and wherein the instructions to determine the interference metric are executable by the at least one processor to cause the apparatus to:
determine a combined interference metric that is based at least in part on a plurality of estimated channel impulse responses of the signal across the plurality of antennas, each estimated channel impulse response corresponds to a respective antenna of the plurality of antennas.

17 . A method for wireless communication at a wireless communication device, comprising:
receiving control information that identifies a preamble for communications to the wireless communication device in an ultra-wideband system; receiving, via a signal in the ultra-wideband system, a data packet that includes the preamble; determining an interference metric that is based at least in part on an estimated channel impulse response of the signal; and processing the data packet based at least in part on the interference metric.

18 . The method of claim 17 , wherein determining the interference metric comprises:
estimating the channel impulse response of the signal across the preamble of the

Assignees

• Qualcomm Inc

Inventors

• Hosseini Ehsan
• Kim Dongsik
• Akhavan Koorosh
• Luong Le Nguyen

Classifications

• H04L25/0212

  of impulse response · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04B17/345

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• H04B17/336 Primary

  Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] · CPC title

• H04B17/328 Primary

  Reference signal received power [RSRP]; Reference signal received quality [RSRQ] · CPC title