Radar Detection System for Wireless Interference Avoidance
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Solution Overview
Problem
Wireless communication stations face challenges in detecting radar transmissions within specific frequency ranges, such as 5250-5350 MHz and 5470-5725 MHz, which can interfere with wireless communications, and need to avoid transmitting during radar activity to prevent interference.
Innovation Solution
The implementation of a system that includes a processor and a comparator to determine if received signals correspond to radar transmissions by comparing energy levels to a threshold, and using timing evaluators to determine parameters like pulse width and repetition frequency, allowing the station to avoid wireless transmissions during radar time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the station continuously monitors for radar transmissions to avoid interference, then the reliability of radar detection is improved, but the loss of time for wireless communication increases
Solution Approach 1:
The system performs preliminary radar detection by monitoring for a specific duration before allowing wireless transmission. This preliminary action ensures that radar signals are detected in advance, preventing interference while minimizing the time lost to monitoring. The detection period is set to be sufficient to identify radar transmissions but not so long as to significantly impact communication efficiency.
Solution Approach 2:
The system adjusts the detection parameters dynamically based on the operating conditions. By changing the monitoring duration and threshold levels according to the specific frequency range and environmental conditions, the system optimizes the balance between reliable radar detection and minimizing communication time loss.
2Measurement precision
If the station performs detailed analysis of received signals to accurately detect radar transmissions, then the measurement precision of radar detection is improved, but the device complexity increases
Solution Approach 1:
The signal processing is divided into distinct stages: initial energy level comparison to filter out obvious non-radar signals, followed by timing evaluation to measure pulse characteristics, and finally parameter analysis to confirm radar identification. This segmentation allows the system to achieve high detection precision through a series of simple, manageable steps rather than one complex analysis process.
Solution Approach 2:
The patent introduces intermediate processing steps between raw signal reception and final radar identification. The timing evaluator acts as an intermediary that extracts temporal characteristics from the received signals, and the pulse width and repetition frequency measurements serve as intermediate parameters that facilitate accurate radar detection without requiring direct complex signal analysis.
Data Source
AI summary
Embodiments of the present invention provide a method, apparatus and system of radar detection. The method, according to some demonstrative embodiments of the invention, may include comparing an energy level of signals received over a wireless communication channel to a threshold; during operation of a processor, if the energy level is above the threshold, determining independently of the processor one or more time values related to said signals; and if the energy level decreases to or below the threshold, interrupting the operation of the processor to determine, based on the time values, one or more parameters of a detection time period during which the energy level was above the threshold. Other embodiments are described and claimed.