Multiple Radar Asynchronous Clocks for Interference Suppression
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Solution Overview
Problem
Existing radar systems with multiple radars face interference issues due to synchronous transmit signals, leading to deteriorated detection performance.
Innovation Solution
A radar system with multiple radars operates using asynchronous transmission clock signals, each with unique rising edge intervals and reception clock signal time differences, minimizing interference and optimizing detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radars operate with synchronous transmission clock signals, then the system can maintain simple clock synchronization, but interference between radars deteriorates detection performance
Solution Approach 1:
The patent changes the clock signal parameters from synchronous to asynchronous operation. Each radar operates with its own independent transmission clock signal that has no fixed phase relationship with other radars' clock signals. This parameter change eliminates the harmful interference that occurs when multiple radars transmit simultaneously with synchronous clocks, while maintaining reliable detection performance through independent operation of each radar.
2Object-affected harmful factors
If multiple radars use independent asynchronous clock signals, then interference between radars is suppressed, but clock synchronization complexity increases
Solution Approach 1:
The patent segments the clock signal management into independent units for each radar. Each radar has its own transmission clock signal and reception clock signal that are generated independently without requiring synchronization with other radars. This segmentation approach simplifies the overall system architecture by eliminating the need for complex clock synchronization mechanisms across multiple radars, while effectively suppressing interference.
3Measurement precision
If radars operate at minimum detection distance, then detection range is optimized, but the system cannot detect targets at farther distances
Solution Approach 1:
The patent implements dynamic adjustment of the reception clock signal time difference relative to the transmission clock signal. By varying the time difference between transmission and reception clock signals, the system can dynamically change its detection range. When the time difference corresponds to the minimum detection distance, the radar optimizes detection precision for close targets. When adjusted to larger time differences, the system can detect targets at farther distances, providing flexible adaptability across different detection scenarios.
Data Source
AI summary
A radar system includes a first radar that generates a first transmit pulse in response to a first transmission clock signal and detects a target in response to the first transmission clock signal and a first reception clock signal with a first transmission clock and reception clock signal time difference according to a first detection distance and a second radar that generates a second transmit pulse in response to a second transmission clock signal and detects the target in response to the second transmission clock signal and a second reception clock signal with a second transmission clock and reception clock signal time difference according to a second detection distance. The first and the second transmission clock signals are not synchronous with each other. The first radar generates a minimum detection distance notification, when the first detection distance is a minimum detection distance detected by the first radar.