Radar Signal Processing Device Reducing Main Bang Influence
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Solution Overview
Problem
Radar devices face increased costs and inefficiencies in suppressing the main bang effect, which can lead to the erasure of echoes from targets near the antenna due to incorrect timing settings and the use of costly circuits for signal suppression.
Innovation Solution
A signal processing device with a correction value calculator that calculates correction values for signal strength at various distances from the antenna based on multiple transmissions and receptions, and a suppressor that uses these values to adjust the received signal levels, thereby reducing the main bang effect without erasing target echoes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circuit is added to designate timing and level to suppress the received signal, then the main bang influence is reduced, but the cost increases
Solution Approach 1:
The patent extracts the main bang signal from the received signal by identifying and removing only the problematic portion (the strong reflection from the antenna itself) while preserving the rest of the signal for normal target detection. This selective extraction approach reduces the harmful effect without requiring complex suppression circuits throughout the entire signal path.
Solution Approach 2:
The patent performs preliminary processing of the received signal by calculating correction values based on signal strength and distance information before final target detection. This preliminary correction reduces the main bang influence early in the processing chain, preventing it from interfering with subsequent detection operations without adding complex hardware.
2Object-affected harmful factors
If the timing setting for suppressing the received signal is incorrect, then the main bang may not be well suppressed, but targets near the antenna may be erased
Solution Approach 1:
The patent implements dynamic correction values that are calculated based on the actual received signal strength and distance information for each measurement. Rather than using fixed timing and level settings, the correction values adapt to the specific conditions of each signal, allowing the system to effectively suppress main bang while preserving weak target echoes near the antenna.
Solution Approach 2:
The patent changes the parameter used for suppression from fixed timing/level settings to dynamic correction values derived from signal strength and distance. This parameter transformation allows the suppression mechanism to automatically adjust to different operating conditions, maintaining both main bang suppression effectiveness and target detection reliability.
3Object-affected harmful factors
If fixed timing and level suppression is used, then the main bang is suppressed, but the echoes of targets in the vicinity of the antenna are erased
Solution Approach 1:
The patent applies different correction strengths at different distances from the antenna. The correction values are calculated locally for each distance range, allowing strong suppression near the antenna where main bang is most problematic while applying minimal or no suppression at greater distances where target echoes need to be preserved. This localized approach maintains both suppression effectiveness and information retention.
Solution Approach 2:
The patent uses dynamic correction values that adapt to the actual signal conditions at each distance rather than applying fixed suppression levels. This allows the system to maintain target echo information by adjusting the correction strength based on the relative strength of the main bang versus potential target signals at each range gate.
Data Source
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AI summary
According to the disclosure, an increase in costs is suppressed and the influence of main bang is reduced. A signal processing device (101) includes a correction value calculator (2) and a suppressor (3). The correction value calculator calculates a correction value of strength for each of distances from an antenna (140) based on a received signal including a signal acquired by multiple transmissions and receptions via the antenna. The suppressor suppresses a level indicated by received data generated based on the received signal for each of the distances by using the correction value for each of the distances.