Satellite Signal Receiver Dynamic Coefficient Adaptation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing systems for receiving satellite signals fail to adapt to environmental conditions and interference power levels, leading to suboptimal performance in interference suppression and thermal noise management.

Innovation Solution

A system that calculates and adds coefficients to the cross-correlation matrix based on thermal noise and interference power levels, using spatio-temporal processing to determine filter coefficients for finite impulse response filters, thereby optimizing signal reception by dynamically adjusting to environmental parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If constant coefficients are added to the diagonal of the intercorrelation matrix, then the conditioning of the calculation is improved, but the system cannot adapt to environmental conditions and interference power levels

Engineering Contradiction:

Improveconditioning of calculationVSAvoidadaptation to environmental conditions

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent transforms the static constant coefficients into dynamic coefficients that automatically adjust based on detected thermal noise power and interference power levels. The coefficients are updated in real-time according to environmental conditions, enabling the system to adapt to varying reception conditions while maintaining improved conditioning of the intercorrelation matrix calculation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameters of the diagonal coefficients from fixed constant values to variable values that depend on detected signal characteristics (thermal noise power and interference power). This parameter change enables the system to adapt to different environmental conditions while maintaining numerical stability in the calculations.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the system uses fixed coefficients, then the calculation is simpler, but the performance is suboptimal under varying reception conditions

Engineering Contradiction:

Improvecalculation simplicityVSAvoidreception performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the system detects thermal noise power and interference power levels, then uses this detected information to adjust the diagonal coefficients of the intercorrelation matrix. This feedback loop enables the system to maintain optimal performance under varying reception conditions while adding only moderate complexity through the detection and adjustment mechanisms.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2711736B1System for receiving satellite signals

Publication Date: 2016.11.16 THALES SA

Figure 1~2

AI summary

A system for receiving satellite signals disturbed by at least one source of interference and by thermal noise, comprising means for receiving said satellite signals, and means for filtering said satellite signals in order to suppress the disturbance from said sources of interference. The system also comprises first means for determining (102) a first cross-correlation matrix of the satellite signals, means for adding (104) a first coefficient to at least one element of the diagonal of said matrix to obtain a second cross-correlation matrix, and second means for determining, from said second cross-correlation matrix, second coefficients used by said filtering means.The system further includes means for detecting (105) a first power of said thermal noise, and third means for dynamically determining (103) the value of said first coefficients, from the first power.