Dynamic Code Allocation for Weather Radar Interference
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Solution Overview
Problem
Current weather radar network systems face inefficiencies in frequency usage due to interference from other radars, necessitating a more effective method for allocating codes to enhance signal processing accuracy and reduce interference.
Innovation Solution
A dynamic code allocating apparatus and method that measures real-time interference signals, generates an objective function to select an optimal code set, and applies it to each radar, adjusting the code interval to minimize interference and improve signal-to-interference ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If radars use a same frequency band to improve frequency usage efficiency, then frequency usage efficiency is improved, but interference between radars increases
Solution Approach 1:
The patent segments the frequency band by allocating different orthogonal codes to different radars operating in the same frequency band. This code division allows multiple radars to share the frequency spectrum while maintaining signal distinguishability through orthogonal code properties, thereby achieving frequency reuse without proportionate interference increase.
Solution Approach 2:
The patent dynamically changes code allocation parameters based on measured interference levels. By adjusting which orthogonal codes are assigned to which radars according to real-time interference measurements, the system optimizes the balance between frequency usage efficiency and interference mitigation.
2Object-affected harmful factors
If orthogonal codes are allocated to each radar to reduce interference, then interference is reduced, but the number of available frequencies decreases
Solution Approach 1:
The patent makes each frequency band universal by allowing multiple radars to operate in the same frequency simultaneously through orthogonal code allocation. Each frequency band serves multiple radars at once, increasing the effective utilization of the limited frequency spectrum while maintaining interference reduction through code orthogonality.
3Adaptability or versatility
If pulse compression method is used to apply code division technology, then code division radar sharing is achieved, but auto correlation floating interference signal increases
Solution Approach 1:
The patent implements feedback by measuring the actual interference signals (including auto correlation floating interference) and using these measurements to dynamically adjust code allocations. This closed-loop approach allows the system to identify and mitigate specific interference problems arising from pulse compression while maintaining code division benefits.
Solution Approach 2:
The patent transitions from static code allocation to dynamic code allocation that adapts to changing interference conditions. By continuously measuring interference and reallocating codes based on current conditions, the system dynamically optimizes performance to reduce auto correlation interference while preserving code division radar sharing capabilities.
Data Source
AI summary
Provided is a code allocating apparatus including an interference signal measurer configured to measure interference signals, an interference signal sharer configured to control radars to share the measured interference signals between the radars, a code allocator configured to dynamically allocate a code generated based on the measured interference signals to each of the radars, and a code applier configured to apply the code to each of the radars.