Multiphase Filter Anti-Jamming System for GPS
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Solution Overview
Problem
Existing GPS anti-jamming technologies are limited by the number of antenna elements, unable to effectively attenuate interference signals from more than N-1 distinct directions, leading to degraded GPS signal performance.
Innovation Solution
The implementation of an Enhanced Maximin algorithm, combining a Frost algorithm and a Maximin algorithm, which uses a multiphase filter array to suppress jamming signals, allowing for effective attenuation of jamming signals from any number of sources, including those greater than, less than, or equal to N, by utilizing two phases of processing to enhance signal-to-interference-plus-noise ratio (SINR).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-element antenna array is used for GPS anti-jamming, then the ability to attenuate interference signals is improved, but the system complexity and number of antenna elements increase
Solution Approach 1:
The patent changes the processing parameters by implementing a two-phase algorithm (Frost followed by Maximin) rather than increasing hardware elements. This allows the system to achieve superior anti-jamming performance by optimizing signal processing parameters instead of adding more antenna elements, directly resolving the contradiction between reliability and device complexity
Solution Approach 2:
The patent combines two different algorithmic approaches (Frost algorithm and Maximin algorithm) into a composite processing system. The Frost algorithm provides initial interference suppression while the Maximin algorithm further enhances performance, creating a composite solution that achieves high reliability without proportionally increasing system complexity
2Adaptability or versatility
If the number of antenna elements is increased to suppress more jamming signals, then the number of suppressible interference sources increases, but the system size and weight increase
Solution Approach 1:
The patent replaces the mechanical approach of adding more antenna elements with an algorithmic solution. By using enhanced signal processing (Frost and Maximin algorithms), the system achieves the ability to suppress multiple jamming sources without the physical weight increase that would result from adding corresponding antenna elements
3Reliability
If more antenna elements are used to handle more interference signals, then the interference suppression capability is improved, but the power consumption increases
Solution Approach 1:
The patent optimizes power consumption by changing the processing parameter approach rather than increasing hardware scale. The two-phase algorithm processes signals efficiently, achieving high interference suppression capability without the proportional power consumption increase that would result from operating additional antenna elements and their associated electronics
Data Source
AI summary
The present disclosure provides an anti jamming system for a wireless communication system an antenna array comprising N antenna elements. At least two multiphase filters being connected to the antenna array and configured to receive an antenna element signal from each one of the N antenna elements. An anti-jamming system for a wireless communication system comprising an antenna array comprising N antenna elements and a filter configured to attenuate jamming signals from sources that is greater than, less than, or equal to N. An anti-jamming system for a wireless communication system comprising a multiphase filter connected to the antenna array to receive an antenna element signal from each antenna element of the antenna array, the multiphase filters comprising a first phase and a second phase, wherein the first phase of the multiphase filter executes a Frost's algorithm and the second phase of the multiphase filter executes a Maximin algorithm.