Dynamic Power Control for Low-Interference Radar Sensing

Solution Overview

Problem

Radar sensing systems face interference issues due to larger bandwidths and increased use cases in wireless communications, leading to challenges in multiplexing sensing and communication signals, especially in dense scenarios where fixed power settings cause unwanted interference.

Innovation Solution

Implement dynamic power control for radar sensing signals to reduce interference while maintaining accurate target detection by exchanging power control messages between radar devices, especially in integrated sensing and communication systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If fixed power settings are used for radar sensing signals, then device complexity is reduced, but interference to other devices increases in dense sensing scenarios

Engineering Contradiction:

Improvepower control mechanismVSAvoidinterference to other devices

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent implements dynamic power control where the radar device adjusts its transmit power based on received power control messages from other devices. The power level changes dynamically according to the received power indicator and target power level, transforming the static power setting into an adaptive dynamic system that responds to environmental conditions and other devices' needs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent establishes a feedback mechanism where power control messages are exchanged between devices. The receiving device sends power control messages containing power indicators back to the transmitting radar device, creating a closed-loop feedback system that enables continuous adjustment of transmit power to minimize interference while maintaining detection performance.

Inventive Principle:

Principle #23Feedback

2Object-generated harmful factors

If power is reduced to minimize interference, then harmful factors to other devices are reduced, but sensing accuracy and target detection capability deteriorate

Engineering Contradiction:

Improveinterference to other devicesVSAvoidtarget detection accuracy

Core Design Contradiction:

Object-generated harmful factorsVSMeasurement precision

Solution Approach 1:

The patent changes the power parameter dynamically by adjusting the transmit power level based on received power control messages. The system modifies the power parameter adaptively rather than using a fixed value, allowing optimization of both interference reduction and detection accuracy through parameter adjustment.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic power control where the radar device adjusts its transmit power based on received power control messages from other devices. The power level changes dynamically according to the received power indicator and target power level, transforming the static power setting into an adaptive dynamic system that responds to environmental conditions and other devices' needs.

Inventive Principle:

Principle #15Dynamics

3Productivity

If larger bandwidths are allocated for wireless communications, then communication capacity increases, but interference in multiplexed sensing and communication signals increases

Engineering Contradiction:

Improvecommunication capacityVSAvoidinterference in multiplexed signals

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent adjusts the power parameter of sensing signals dynamically to compensate for the increased interference caused by larger communication bandwidths. By modifying power levels based on received feedback, the system maintains sensing performance despite the broader bandwidth allocation for communication.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent establishes a feedback mechanism where power control messages are exchanged between devices. The receiving device sends power control messages containing power indicators back to the transmitting radar device, creating a closed-loop feedback system that enables continuous adjustment of transmit power to minimize interference while maintaining detection performance.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Dynamic power control effectively reduces interference from aggressor devices while ensuring accurate target detection, enhancing spectral efficiency in dense sensing scenarios.

Implementation Method 1

receiving, at the network device, reflection signals generated based on a plurality of sensing signals reflecting from a target object

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250264580A1Dynamic power control for sensing

Publication Date: 2025.08.21 QUALCOMM INC

AI summary

Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, an example of a process may include receiving, at a network device, reflection signals generated based on a plurality of sensing signals reflecting from a target object. The plurality of sensing signals may be configured in a plurality of resources, with each resource of the plurality of resources being associated with a different respective power level. The process may further include determining, at the network device, a power level of a resource associated with a reflection signal is an acceptable power level for performing sensing of the target object based on the power level meeting a predefined power level.