Blind Equalizer Interference Measurement Without Carrier Interruption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for detecting in-band interference in wireless communication systems often require interrupting the service, leading to unnecessary interruptions and inefficiencies, as they rely on temporary removal of the carrier signal for analysis.
Innovation Solution
A non-intrusive method that detects and measures in-band interference by acquiring and processing the carrier signal while it remains active, using techniques such as signal filtering, digitization, decimation, blind equalization, and demodulation to extract an error vector representative of the interference, allowing for continuous operation and accurate interference detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If the carrier is temporarily removed for frequency analysis to detect interference, then interference detection capability is improved, but service continuity deteriorates
Solution Approach 1:
The patent extracts interference signals from the received composite signal before the carrier is removed for traditional frequency analysis. By performing preliminary interference extraction and analysis while the carrier is still present, the system achieves interference detection without service interruption, resolving the contradiction between detection capability and service continuity
Solution Approach 2:
The patent extracts the interference signal component from the composite received signal using signal processing techniques. By separating and analyzing the interference component independently, the system can detect interference without removing the carrier, thus maintaining service continuity while achieving effective interference detection
2Measurement precision
If the carrier is removed for spectrum analysis to identify interference, then measurement accuracy is improved, but service availability deteriorates
Solution Approach 1:
The patent introduces an intermediary signal processing stage that processes the composite signal containing both carrier and interference. By using the composite signal as an intermediary rather than removing the carrier, the system maintains service availability while achieving accurate interference measurement through blind equalization and error vector analysis
3Difficulty of detecting and measuring
If traditional frequency analysis methods are used to detect interference, then detection effectiveness is improved, but operational efficiency deteriorates
Solution Approach 1:
The patent enables continuous interference detection and measurement without interrupting the carrier transmission. The blind equalization and error vector processing operate continuously on the composite signal, maintaining both detection effectiveness and operational efficiency by eliminating the need for service interruptions
Data Source
AI summary
A method and system for measuring noise and or interference in a communications signal without taking the signal out of service. In the present invention the communications signal is converted from an RF signal into an IF signal. The IF signal is then digitized and stored. The stored signal is processed to determine the interference signal. The interference signal is calculated from an error vector produced by a blind equalizer demodulator. The interference signal is extracted and presented to a user.