Radar Signal Processing Clock Adjustment for Power Stability
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Solution Overview
Problem
High-speed processing in radar systems causes power supply current jumps during transmission phases, disrupting radar operations due to frequent switching of the signal processing circuit (SPU) on and off.
Innovation Solution
Adjusting the processing clock signal based on a time window to ensure continuous signal processing without gaps, using a fractional clock divider circuit to manage the processing speed and prevent load jumps, allowing seamless operation by maintaining a stable power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed processing is conducted by the signal processing circuit, then processing efficiency is improved, but power supply current jumps occur that disturb radar operations
Solution Approach 1:
The signal processing circuit operates in periodic intervals using defined time windows (processing time windows) rather than continuously. The circuit is activated only during these periodic windows to process radar signals, then deactivated. This periodic operation pattern allows the system to maintain high processing speed during active periods while avoiding current jumps during transmission phases, as the circuit is switched off or in low-power mode during those critical periods.
Solution Approach 2:
The operating state of the signal processing circuit is made dynamic by adjusting its activation based on the radar transmission phase. The circuit transitions between active processing mode and inactive/low-power mode according to the timing requirements. This dynamic control allows the system to optimize processing speed when needed while preventing harmful current jumps during transmission, resolving the contradiction between productivity and harmful effects.
2Reliability
If the signal processing circuit is switched on and off frequently, then processing can be synchronized with transmission phases, but disturbing switching effects are conveyed over power supply lines
Solution Approach 1:
The system maintains continuous useful action by ensuring that processing time windows are arranged back-to-back without substantial gaps between them. This continuous processing schedule allows the signal processing circuit to remain active throughout the entire acquisition period, processing radar signals continuously without interruption. By eliminating gaps in the processing schedule, the system avoids the need for frequent switching on and off, thereby preventing disturbing switching effects on the power supply lines while maintaining synchronization with transmission phases.
Data Source
AI summary
A method for processing a radar signal includes adjusting a processing clock signal, wherein the processing clock signal determines an operation period of a signal processing circuit, wherein the processing clock signal is determined based on a time window, wherein the size of the time window is determined based on the maximum time available for processing a portion of the radar signal and wherein the end of the time window is determined such that it does not occur during an active transmission portion of the radar system.