Digital Signal Processing Pipeline for Ultrasonic Interference Reduction
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Solution Overview
Problem
Data/signal evaluation systems in working devices, such as ultrasonic driver-assistance systems in vehicles, generate interference signals due to digital signal-processing processors' operation, leading to operating errors.
Innovation Solution
Implementing a sequential pipeline with two operating modes for digital signal-processing processors: a high-power mode for demanding tasks and a low-power mode with temporal separation to reduce current peaks and interference signals, where processors are operated in parallel or intermittently in idle/rest modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If digital signal-processing processors are operated in parallel to handle demanding processing tasks, then processing power and productivity are improved, but current peaks and interference signals increase
Solution Approach 1:
The system dynamically switches between parallel and sequential operating modes based on processing requirements. In the first operating mode, processors operate in parallel to maximize processing power for demanding tasks. In the second operating mode, processors operate sequentially to reduce current peaks and interference signals, thereby dynamically adapting the system behavior to different operational conditions.
Solution Approach 2:
The system employs periodic duty cycle operation where digital signal-processing processors are activated in alternating time intervals rather than continuously. This periodic activation pattern allows processors to be switched on and off in a controlled manner, reducing the occurrence and magnitude of current peaks while maintaining adequate processing capability through the sequential pipeline architecture.
2Object-generated harmful factors
If digital signal-processing processors are operated sequentially to reduce current peaks, then interference signals are reduced, but processing speed decreases
Solution Approach 1:
The processing pipeline is segmented into multiple stages with dedicated digital signal-processing processors for each stage. This segmentation allows the system to process data through a sequence of specialized processing steps. While sequential operation reduces processing speed compared to full parallel operation, the segmentation enables efficient resource utilization and reduces interference signals by staggering the operation of different processor segments.
Data Source
AI summary
An operating method for a data/signal evaluation system in an ultrasonic operation assistance system, in which a plurality of digital signal-processing processors is developed in a sequential pipeline for the evaluation of data and/or signals, including a first operating mode for processing tasks requiring a comparatively greater processing effort with a comparatively greater measure of processing power to be generated by the digital signal-processing processors, and having a second operating mode for processing tasks requiring a comparatively lower processing effort with a comparatively lower measure of processing power to be generated by the digital signal-processing processors. In the first operating mode, the digital signal-processing processors of the sequential pipeline are operated in parallel with each other, and in the second operating mode at least one pair of the plurality of signal-processing processors of the sequential pipeline is operated sequentially.