UWB Preamble CIR Analysis for Adjacent Channel Interference

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Ultra-wideband (UWB) systems face challenges in mitigating adjacent channel interference (ACI), leading to high packet error rates and increased latency due to the lack of effective interference detection mechanisms.

Innovation Solution

Implementing a method and apparatus for wireless communication that estimates a channel impulse response (CIR) to determine an interference metric, allowing for interference detection and mitigation by processing data packets based on the estimated CIR and signal-to-interference-plus-noise ratio (SINR).

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If UWB systems operate without interference detection mechanisms, then device complexity is reduced, but packet error rate increases and reliability deteriorates

Engineering Contradiction:

Improveinterference detection mechanismVSAvoidpacket error rate

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent performs preliminary interference detection by estimating the channel impulse response (CIR) and calculating an interference metric before processing the data packet. This preliminary action allows the system to identify adjacent channel interference early in the reception process, enabling timely mitigation decisions without adding complex post-processing mechanisms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex hardware-based interference mitigation mechanisms with signal processing techniques. By using CIR estimation and interference metric calculation based on received signals, the system achieves reliable interference detection through software/algorithms rather than additional physical interference cancellation hardware.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If UWB systems implement effective interference detection, then reliability improves, but processing time increases and productivity decreases

Engineering Contradiction:

Improveinterference detection capabilityVSAvoiddata processing throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The interference detection and metric calculation are performed preliminarily during the preamble processing stage, before the main data packet processing. This timing allows the system to make go/no-go decisions early, avoiding unnecessary processing of interfered packets and maintaining overall throughput.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies interference detection selectively - performing full CIR estimation and interference metric calculation only when needed for mitigation decisions. For packets without interference, the system can use simpler detection methods, thus maintaining high processing throughput while ensuring reliability when interference is present.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If UWB systems use CIR estimation for interference detection, then measurement precision improves, but device complexity increases

Engineering Contradiction:

Improveinterference metric accuracyVSAvoidsignal processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex hardware-based interference measurement systems with signal processing techniques. By estimating the channel impulse response (CIR) from received signals and calculating interference metrics through mathematical operations, the system achieves high measurement precision using software-based methods rather than additional physical measurement hardware.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The CIR estimation process serves multiple functions simultaneously: it characterizes the wireless channel for communication purposes and provides the basis for interference detection. This multi-functionality allows the system to achieve precise interference measurement without adding dedicated measurement complexity, as the same signal processing serves dual purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12489534B2Adjacent channel interference mitigation for ultra-wideband systems

Publication Date: 2025.12.02 QUALCOMM INC

AI summary

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.