Pulse Radar Noise Replica Generation for Interference Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle-mounted pulse radar systems face challenges in isolating signals effectively due to the use of multi-pin connectors, leading to interference noise issues, especially when the baseband and RF units are on separate circuit boards, which complicates production and increases costs.
Innovation Solution
A control method and apparatus that generate a replica signal of noise to remove interference from the reception signal, updating it quickly to ensure accurate target detection, using a combination of transmission control signals and noise processing steps to isolate and subtract noise from the signal data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the baseband unit and RF unit are connected using a multi-pin connector to reduce cost, then manufacturing cost is reduced, but control signal leaks into reception signal causing interference noise
Solution Approach 1:
The patent applies preliminary action by generating a replica of the control signal before it leaks into the reception signal path. The control signal replica generation unit creates an identical copy of the control signal that is then used to subtract the interference component from the reception signal, preventing the interference noise from affecting target detection
Solution Approach 2:
The patent converts the harmful control signal leakage into a beneficial effect by using the leaked signal itself to create a replica. This replica is then subtracted from the reception signal, transforming the interference into a known quantity that can be removed, thereby improving signal quality while maintaining the cost-effective multi-pin connector design
2Measurement precision
If isolation between multiple pins is increased to reduce interference noise, then reception signal detection capability is improved, but device complexity and production difficulty increase
Solution Approach 1:
The patent uses copying by creating a replica of the control signal that leaks into the reception path. This replica is generated by the control signal replica generation unit and is identical to the interfering control signal, allowing for precise subtraction of the interference component without requiring complex physical isolation structures
3Ease of operation
If the control signal is used to gate the carrier wave, then transmission signal generation is enabled, but the control signal creates interference noise in the reception signal
Solution Approach 1:
The patent applies feedback by feeding back the control signal to the control signal replica generation unit. This feedback loop allows the system to continuously generate an accurate replica of the control signal, which is then used to subtract the interference component from the reception signal, maintaining transmission functionality while eliminating interference
Solution Approach 2:
The patent introduces an intermediary element - the control signal replica - that mediates between the control signal and the reception signal. This replica acts as a substitute for the actual control signal in the reception path, allowing the interference to be removed without affecting the original control signal's gating function
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A pulse radar apparatus and a control method therefor are provided that can detect information about a target with a high degree of accuracy by allowing detection of target information at all times and updating a replica signal of a noise signal in order. When the number of sets of distance data n1 is determined to be more than the number of sets of all distance data Nr in step S5, it is determined that target information detection processing is finished, and replica signal generation processing is subsequently performed. The radar function is activated in steps S13, S15, S16, and the noise signal for each distance data is obtained in step S17. Thereafter, in steps S19, S21, S23, the first, second, and third background signals, respectively, are generated, and thereafter, in step S23, a replica signal is generated.