Guard Subcarrier Power Measurement for Adjacent Channel Interference Detection
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Solution Overview
Problem
Existing techniques for detecting interference in wireless communication channels are limited in their ability to accurately and efficiently localize sources of interference, particularly in distinguishing between upper and lower adjacent channels, and often rely on resource-intensive implementations.
Innovation Solution
The use of power measurements of guard subcarriers, combined with total signal power measurements, to detect and localize interference, allowing for improved sensitivity and reduced resource intensity by processing in the frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional interference detection techniques are used, then interference detection is performed, but the ability to accurately localize interference sources and distinguish between upper and lower adjacent channels is limited
Solution Approach 1:
The patent segments the interference detection process by separately analyzing guard subcarriers in the frequency domain. By dividing the OFDM signal into individual subcarriers and examining power levels in guard bands, the system can localize interference sources more accurately without requiring complex time-domain signal processing.
Solution Approach 2:
The patent transitions from time-domain interference detection to frequency-domain analysis by examining the spectral characteristics of guard subcarriers. This dimensional change enables precise localization of adjacent channel interference by measuring power leakage into guard bands, providing superior interference source identification without increasing device complexity.
2Reliability
If resource-intensive interference detection implementations are used, then interference detection capability is provided, but computational burden and resource consumption increase
Solution Approach 1:
The patent extracts only the necessary information for interference detection by measuring power levels specifically in guard subcarriers rather than processing the entire signal. This extraction approach maintains reliable interference detection capability while significantly reducing computational burden by focusing only on the relevant spectral regions.
Solution Approach 2:
The patent applies partial action by performing interference detection on only the guard subcarriers rather than analyzing the complete signal spectrum. This selective measurement provides sufficient interference detection reliability while minimizing computational resource consumption by avoiding unnecessary processing of data subcarriers.
Data Source
AI summary
Systems, methods, and devices perform channel interference detection for wireless devices. Methods include receiving a signal at a wireless device, the signal including at least one data subcarrier and one or more guard subcarriers. Methods also include determining, using processing logic, that one or more guard subcarriers are available for adjacent channel interference (ACI) detection, measuring, using the processing logic, a power of each of the one or more guard subcarriers and a total power of the one or more guard subcarriers, and determining, using the processing logic, an ACI is present based, at least in part, on the measurements of the one or more guard subcarriers. Methods further include performing, using the processing logic, one or more deweighing operations based on one or more identified features of the ACI.