Sequential Envelope Detection for Low-Complexity Signal Sampling
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Solution Overview
Problem
Existing envelope detection methods require significant circuit complexity and struggle to accurately detect sophisticated envelopes, especially in low-complexity analog circuits.
Innovation Solution
A method and apparatus that extract sampling signals from a modulating signal, calculate envelope component values by multiplying and adding these signals, and adjust time intervals to detect the envelope with reduced complexity, using a Sequential Envelope Detection (SED) process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal processing is performed using band-pass filter or low-pass filter in frequency band, then envelope detection accuracy is improved, but circuit complexity increases
Solution Approach 1:
The patent replaces traditional mechanical/electrical signal processing components (band-pass filters, low-pass filters, Hilbert transform circuits) with a computational approach using a processor that performs digital signal processing. The processor executes algorithms to extract envelope information directly from sampled signals, substituting complex analog filtering hardware with software-based processing that achieves the same envelope detection function with reduced hardware complexity.
2Device complexity
If low complexity analog circuit schemes are used, then circuit complexity is reduced, but envelope detection capability deteriorates
Solution Approach 1:
The patent substitutes simple analog circuit schemes with a digital processing system that uses a processor to execute envelope detection algorithms. This allows the system to achieve sophisticated envelope detection capabilities that would be difficult or impossible to implement with simple analog circuits, while maintaining the advantage of lower hardware complexity through software-based processing.
Solution Approach 2:
The patent changes the operating parameters by moving from analog domain processing to digital domain processing. By sampling the signal and performing processing in the digital domain, the system can implement complex envelope detection algorithms that adapt to different signal conditions, improving detection capability while keeping the hardware structure simple.
3Measurement precision
If conventional signal processing methods are used, then envelope detection is achieved, but calculation complexity increases
Solution Approach 1:
The patent extracts only the necessary envelope information from the sampled signals using a targeted algorithm that focuses computation on extracting envelope components rather than performing full spectral analysis. The processor identifies and extracts envelope information by analyzing relationships between sampled points, eliminating the need for complex full-signal processing while maintaining accurate envelope detection.
Data Source
AI summary
A method and apparatus for detecting an envelope are provided. The method and apparatus may detect an envelope of a modulating signal based on a low calculation complexity and a simple circuit configuration, by detecting an envelope for a plurality of sampling signals with equal time intervals.