Pulse Radar Receiver Sensitivity Control for Disturb Pulse Saturation
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Solution Overview
Problem
Pulse radar systems face performance degradation due to saturation from disturb pulses reflected by obstacles, which overwhelm the receiver and degrade its ability to detect targets behind obstacles.
Innovation Solution
A pulse radar apparatus that generates a sensitivity adjustment interval signal based on the transmission/reception clock delay, allowing the receiver to adjust its sensitivity dynamically to differentiate between disturb and echo pulses, thereby reducing the impact of disturb pulses and improving detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiver maintains high sensitivity to detect echo pulses from targets behind obstacles, then the detection capability for distant targets is improved, but the receiver becomes saturated by disturb pulses reflected from obstacles, degrading performance
Solution Approach 1:
The receiver sensitivity is made dynamic rather than fixed. The sensitivity adjustment interval signal continuously modulates the receiver's sensitivity level based on the transmission/reception clock delay, allowing the system to adapt sensitivity in real-time to differentiate between disturb pulses and echo pulses, thereby preventing saturation while maintaining detection capability.
Solution Approach 2:
The system employs periodic sensitivity adjustment cycles synchronized with the transmission/reception clock delay. By periodically varying the sensitivity level according to the clock delay characteristics, the receiver can rhythmically adjust its sensitivity to avoid saturation during disturb pulse reception while maintaining high sensitivity for echo pulse detection.
2Object-affected harmful factors
If the receiver sensitivity is lowered to avoid saturation from disturb pulses, then the harmful impact of disturb pulses is reduced, but the ability to detect weak echo pulses from targets behind obstacles deteriorates
Solution Approach 1:
Instead of using a fixed low sensitivity setting that would permanently degrade detection capability, the system dynamically adjusts sensitivity based on the transmission/reception clock delay. The sensitivity is lowered only temporarily and selectively when disturb pulses are expected, then restored to high sensitivity for echo pulse detection, thereby preventing permanent loss of detection capability.
Solution Approach 2:
The system performs preliminary sensitivity adjustment based on the known transmission/reception clock delay characteristics. By anticipating when disturb pulses will occur and pre-adjusting sensitivity accordingly, the receiver avoids saturation before it happens while maintaining the ability to detect weak echo pulses at appropriate times.
3Ease of operation
If a fixed sensitivity level is used in the receiver, then the system is simple to operate, but the receiver cannot differentiate between disturb pulses and echo pulses, leading to performance degradation
Solution Approach 1:
The receiver automatically adjusts its own sensitivity level based on the transmission/reception clock delay without requiring external manual control. The sensitivity adjustment interval signal is generated internally by the clock generator, allowing the system to self-regulate and differentiate between disturb and echo pulses while maintaining operational simplicity.
Solution Approach 2:
The system uses feedback from the transmission/reception clock delay to automatically control receiver sensitivity. The clock delay information is fed back to the sensitivity adjustment mechanism, creating a closed-loop system that continuously adapts sensitivity based on actual signal conditions, thereby improving reliability while keeping the interface simple.
Data Source
AI summary
Disclosed is a pulse radar apparatus including a clock generator generating a transmission clock signal, a reception clock signal, and a sensitivity adjustment interval signal, a transmitter radiating a transmission pulse based on the transmission clock signal, and a receiver receiving a first pulse and a second pulse, which are associated with the transmission pulse, with different sensitivities based on the reception clock signal and the sensitivity adjustment interval signal.