Pulse Sequence Detection Using FIR Filtering and Histogram Analysis
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Solution Overview
Problem
Existing signal detection techniques for pulse sequences often sacrifice operational speed to maximize performance, resulting in significant processing delays due to the need for multiple passes through data sets and complex transformations.
Innovation Solution
A method and apparatus using a finite impulse response filter to determine pulse width and applying a histogram to determine pulse repetition interval, employing a Haar wavelet filter and efficient threshold estimation to minimize latency, allowing for real-time detection and characterization of pulse sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency domain processing and Haar wavelet transformation are used to precisely isolate signal content, then measurement precision is improved, but processing time increases due to additional latencies
Solution Approach 1:
The patent applies a finite impulse response (FIR) filter with pre-calculated coefficients to the received signal before pulse detection. This preliminary filtering action prepares the signal in advance, allowing for direct time-domain pulse detection without requiring subsequent frequency domain transformations, thereby reducing processing latency while maintaining detection precision
Solution Approach 2:
The patent extracts only the essential pulse characteristics (amplitude, width, position) directly from the filtered time-domain signal using simple threshold-based detection. By taking out only the necessary information rather than performing complete frequency domain analysis, the system achieves precise pulse characterization with minimal processing time
2Reliability
If multiple passes through data blocks are made using SDIF deinterleaving algorithm, then pulse deinterleaving performance is improved, but processing time increases significantly
Solution Approach 1:
The patent performs preliminary pulse detection and characterization in a single pass through the received signal, identifying pulse parameters and organizing them into sequences. This preliminary organization enables efficient deinterleaving operations without requiring multiple repeated passes through the data, reducing processing delay while maintaining deinterleaving accuracy
Solution Approach 2:
The patent segments the received signal into individual pulse events with identified parameters (amplitude, width, position, timing). By segmenting the continuous signal into discrete characterized pulses, the system enables efficient single-pass processing and straightforward deinterleaving operations, avoiding the need for multiple iterative passes through the entire data block
3Measurement precision
If complex signal processing techniques are used to maximize detection performance, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent changes the approach from complex frequency-domain parameter estimation to simple time-domain threshold-based detection. By using pre-calculated FIR filter coefficients and straightforward threshold comparison, the system achieves accurate pulse parameter detection with significantly reduced algorithmic complexity, avoiding the need for computationally intensive transformations
Solution Approach 2:
The patent employs simple, computationally inexpensive operations (FIR filtering with fixed coefficients, threshold comparison, basic histogram analysis) that can be executed rapidly. These simple processing steps act as disposable, single-use operations that achieve detection precision without requiring complex iterative algorithms, reducing both device complexity and processing time
Data Source
AI summary
Method and apparatus for detecting and characterizing a pulse sequence using a finite impulse filter to determine a pulse width (PW) of pulses within the pulse sequence. The method and apparatus may also apply a histogram to the filtered pulses to determine the pulse rate interval (PRI) of pulses in the pulse sequence.