Active Channel Detection Using Mean Filter for Overlapping Wireless Signals
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Solution Overview
Problem
In modern wireless communication networks, particularly in LTE and eMTC systems, determining an active channel is time-consuming due to overlapping channels, requiring a more efficient method than sequential channel scanning.
Innovation Solution
A device comprising a receiver, a mean filter, and a detector that digitizes the wireless signal, applies a mean filter to increase resolution, and detects the active channel without decoding the complete signal, utilizing techniques like Fourier transformation and look-up tables for efficient channel identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sequential channel scanning is used to determine active channels, then channel detection can be performed, but detection time increases significantly
Solution Approach 1:
The patent applies a mean filter to the received signal before channel detection to pre-process and enhance the signal quality. This preliminary action improves the signal-to-noise ratio and channel resolution, enabling more accurate channel identification without requiring exhaustive sequential scanning of all channels, thus reducing detection time while maintaining accuracy
Solution Approach 2:
The patent extracts only the necessary information from the signal by applying a mean filter to enhance specific channel characteristics. Instead of analyzing the complete signal in detail, the filter extracts the essential channel identification features, allowing rapid detection of active channels without the time-consuming process of complete signal decoding
2Measurement precision
If complete signal decoding is performed to identify active channels, then accurate channel identification is achieved, but processing complexity and time increase
Solution Approach 1:
The patent extracts only the essential channel identification information by applying a mean filter to the received signal. This selective extraction of relevant features allows accurate channel identification without the need for complete signal decoding, significantly reducing processing complexity while maintaining identification accuracy
Solution Approach 2:
The patent applies partial action by using a mean filter to process only the necessary portions of the signal required for channel identification. Instead of performing exhaustive complete signal decoding, the filter applies a simplified processing approach that provides sufficient information for accurate channel detection with reduced computational complexity
3Reliability
If channels are separated with large frequency margins, then channel interference is reduced, but frequency spectrum utilization decreases
Solution Approach 1:
The patent changes the processing parameters by applying a mean filter with specific window characteristics to the received signal. This parameter change enables the system to resolve and identify channels even when they are closely spaced with small frequency margins, allowing tighter channel packing and improved spectrum utilization while maintaining reliable channel identification through enhanced signal processing
Data Source
AI summary
A determination device serves for determining an active channel of a plurality of channels in a wireless signal, wherein adjacent channels overlap each other by a predetermined frequency threshold. The determination device comprises a receiver for receiving the wireless signal and providing a respective digitized signal, a first filter for applying a mean filter to the digitized signal, and a detector for detecting the active channel in the first filtered signal.