Quick-Scanning Receiver Architecture for Radar Pulse Intercept
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Solution Overview
Problem
Current radioelectric receivers face challenges in monitoring the electromagnetic spectrum due to their inability to efficiently detect signals across a wide frequency band and 360° angular coverage, leading to a low probability of intercepting short-duration radar pulses, as they require slow scanning strategies that result in long listening times and periodicity, forcing them to ignore certain sub-bands and angular sectors.
Innovation Solution
A fast scanning radio monitoring receiver architecture that includes a fast detection channel with a frequency-controlled oscillator for rapid frequency sweeps and multiple measurement channels with delay lines for precise signal measurements across multiple angular sectors, allowing for short listening times and comprehensive signal analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If slow scanning strategy is used to monitor the entire frequency band and angular coverage, then measurement precision is improved, but listening time increases and probability of intercepting short-duration pulses decreases
Solution Approach 1:
The system segments the frequency band into multiple sub-bands and the angular coverage into multiple sectors, with each measurement channel assigned to monitor specific sub-bands and sectors. This segmentation allows parallel monitoring of multiple regions, reducing the total listening time required to cover the entire band while maintaining detection precision in each segment.
Solution Approach 2:
The system implements periodic listening cycles where measurement channels sequentially monitor different sub-bands and angular sectors. By organizing monitoring into periodic cycles with optimized duration, the system ensures comprehensive coverage of the entire frequency band and angular space while minimizing the listening time for each individual sub-band, thereby increasing the probability of intercepting short-duration radar pulses.
2Reliability
If listening periodicity is increased to improve probability of intercepting short-duration pulses, then detection reliability improves, but the number of sub-bands that can be monitored decreases
Solution Approach 1:
The frequency band is divided into multiple sub-bands that can be simultaneously monitored by different measurement channels. This segmentation allows the system to maintain low listening periodicity (high probability of intercept) across all sub-bands by distributing the monitoring task across multiple parallel channels, rather than sequentially scanning through sub-bands with long periodicity.
Solution Approach 2:
Each measurement channel is designed to be multi-functional, capable of monitoring both frequency sub-bands and angular sectors. This universality allows the system to monitor a large number of sub-bands with improved reliability by having multiple channels operating in parallel, where each channel can detect pulses in its assigned sub-bands with sufficient listening periodicity.
3Productivity
If fast scanning is used to reduce listening time, then productivity improves, but measurement precision may deteriorate
Solution Approach 1:
The system segments the monitoring task into multiple measurement channels, each responsible for specific sub-bands and angular sectors. This segmentation enables fast scanning across the entire frequency band by distributing the scanning task across multiple channels operating in parallel, while each channel maintains sufficient listening time for accurate signal measurement within its assigned sub-bands.
Solution Approach 2:
The system performs preliminary detection in each sub-band using measurement channels before proceeding to comprehensive signal analysis. This preliminary action allows the system to quickly identify potential signals across the entire frequency band, then focus measurement resources on detected signals, thereby maintaining both fast scanning speed and measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables a high probability of intercepting radar pulses with minimal listening time, comparable to state-of-the-art slow-scan receivers, while covering the entire frequency band and angular space, significantly improving detection efficiency.
Implementation Method 1
a fast detection channel with a frequency-controlled oscillator for rapid frequency sweeps
Implementation Method 2
multiple measurement channels with delay lines for precise signal measurements
Data Source
Figure 1
Figure 2
Figure 3a~3c
AI summary
The receiver has a rapid detection line (VR) comprising a rapid scanning receptor (20) for receiving radio frequency signals in sub-frequency bands. The scanning receptor is connected to a radio frequency receiving antenna (AR) by an input (Er). Complete measurement receptors (R1-Rp) provide complete measurements of the radio frequency signals received by the receiver, through measurement lines (V1-Vp) from signals received in an output (Sr) of n-receiving channels (CR1-CRj-CRn) of a considered measurement lines (Vi), where p and n are numbers equal to or higher than 1. An independent claim is also included for a method for monitoring an electromagnetic spectrum in frequency bands comprising multiple sub-frequency bands by a radio receiver.