Pulse Disturbance Weighting Detector Circuit
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Solution Overview
Problem
Existing weighting detectors for digital radio systems fail to optimally weight impulsive disturbances at high pulse repetition frequencies, as they do not account for the flat profile of disturbance weighting profiles above the cut-off frequency.
Innovation Solution
A detector circuit comprising a cascade of an rms detector, a linear average detector, and a first peak detector is used, allowing correct weighting of impulsive disturbances above and below the cut-off frequency, including at high pulse repetition frequencies, through specific integration times and cut-off frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single rms detector or peak detector is used, then the weighting is simple and device complexity is low, but the weighting accuracy is insufficient at high pulse repetition frequencies
Solution Approach 1:
The detector circuit is segmented into three functional stages: a peak detector for high-frequency components above the cut-off frequency, an rms detector for the transition region, and a linear average detector for low-frequency components below the cut-off frequency. Each stage processes a specific frequency range, enabling accurate weighting across the entire spectrum while maintaining manageable complexity through modular design.
Solution Approach 2:
The circuit dynamically switches between different detection methods based on the input signal characteristics. The peak detector operates dominantly at high pulse repetition frequencies, while the linear average detector takes over at low frequencies, with the rms detector providing transition. This dynamic adaptation allows the system to optimize its response according to the actual disturbance profile.
2Measurement precision
If the integration time of the rms detector is extended to improve low-frequency weighting, then weighting below cut-off frequency improves, but the response to high-frequency disturbances deteriorates
Solution Approach 1:
The frequency spectrum is segmented into distinct regions handled by different detectors. The linear average detector with extended integration time handles low-frequency components below the cut-off frequency, while the peak detector with short response time handles high-frequency components. This segmentation allows each detector to be optimized for its specific frequency range without compromise.
Solution Approach 2:
The rms detector serves as an intermediary stage between the peak and linear average detectors. It processes signals in the transition region around the cut-off frequency, ensuring smooth handover between the high-frequency and low-frequency detection paths. This intermediary function maintains continuity and accuracy across the entire frequency spectrum.
Data Source
AI summary
A rectifier circuit used for weighting pulse disturbances in relation to the influence thereof on digital radio systems, comprising a cascade circuit of an effective value rectifier and a linear average rectifier, wherein a peak value rectifier is arranged upstream from the effective value rectifier.