Receiver Signal Detection Circuit Interference Handling
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Solution Overview
Problem
In wireless receivers, high-intensity interference signals from adjacent channels can hinder accurate signal processing due to filters' inability to completely remove interference when frequencies are close, leading to errors and delays in distinguishing effective signals.
Innovation Solution
A receiver system comprising a filter, signal detection circuit, and synchronization processing circuit that uses absolute value and smoothing calculations to determine the presence of interference and effective signals, allowing for accurate timing of effective signal detection even in the presence of strong interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher order filters are used to filter out interference signals, then the filtering performance is improved, but the device complexity increases and the filter cannot completely remove interference when frequencies are very close
Solution Approach 1:
The patent segments the signal processing into distinct phases: interference signal detection phase and effective signal processing phase. By detecting interference signals first and marking their presence, the system can then process effective signals knowing when interference is present, allowing simpler filters to achieve better effective signal recovery through intelligent processing rather than relying solely on complex filtering.
Solution Approach 2:
The patent performs preliminary detection of interference signals before processing effective signals. The interference signal detection circuit continuously monitors for interference presence and generates indicators beforehand, so that when effective signals arrive, the synchronization processing circuit already has the information needed to handle interference appropriately, avoiding the need for complex real-time filtering.
2Object-affected harmful factors
If filters are used to remove interference signals, then signal interference is reduced, but the synchronization processing circuit cannot accurately distinguish interference from effective signals when frequencies are close
Solution Approach 1:
The patent introduces an intermediary detection mechanism - the interference signal detection circuit - that acts as a mediator between the raw signal and the synchronization processing circuit. This intermediary continuously monitors for interference presence and generates indicators that communicate interference status to the synchronization processing circuit, enabling accurate distinction without requiring the main processing circuit to directly analyze complex signal differences.
Solution Approach 2:
The patent implements feedback through the interference signal indicator that continuously reports the presence or absence of interference signals to the synchronization processing circuit. This feedback loop allows the synchronization circuit to adjust its processing based on real-time interference conditions, maintaining accurate signal distinction even when frequencies are very close and filtering is insufficient.
3Productivity
If the filter output signal is processed directly without interference detection, then the processing speed is maintained, but errors and delays occur in signal processing when interference is present
Solution Approach 1:
The patent performs preliminary detection of interference signals before the synchronization processing circuit processes effective signals. By detecting interference presence in advance and generating indicators beforehand, the system prepares the synchronization circuit with necessary information so that effective signals can be processed correctly without causing errors or delays, maintaining both speed and accuracy.
Solution Approach 2:
The patent segments the processing function by separating interference detection from effective signal processing. The interference signal detection circuit handles interference monitoring independently, while the synchronization processing circuit focuses on effective signal processing. This segmentation allows each circuit to optimize its function without compromising the other, maintaining processing speed while improving accuracy through specialized handling of interference conditions.
Data Source
AI summary
The present invention provides a receiver including a filter, a signal detection circuit and a synchronization processing circuit. The filter is configured to filter a filter input signal to generate a filter output signal. The signal detection circuit is configured to determine whether the filter input signal or the filter output signal includes an interference signal according to the filter input signal and the filter output signal, to generate an interference signal indicator; wherein when the interference signal indicator indicates that the filter input signal or the filter output signal includes the interference signal, the signal detection circuit further determines whether the filter output signal comprises an effective signal to generate an effective signal indicator. The synchronization processing circuit is configured to process the filter output signal according to the interference signal indicator and the effective signal indicator.