Phase-Diversity RF Receiver Dynamic Control Coefficient Adaptation
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Solution Overview
Problem
Existing phase-diversity radiofrequency receivers face challenges in determining the optimal control coefficient for convergence speed, leading to suboptimal compromises between speed and accuracy, especially in varying environmental conditions such as multipath levels and received field levels.
Innovation Solution
A radiofrequency receiver with two tuners that continuously recalculates the control coefficient for convergence speed based on multipath and received field levels, using an increasing function to adjust the coefficient dynamically, prioritizing multipath level adjustments for optimal signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed control coefficient is used, then the device complexity is reduced, but the adaptability to varying environmental conditions deteriorates
Solution Approach 1:
The control coefficient is transformed from a static fixed value to a dynamic parameter that continuously adapts to environmental conditions. The recalculus unit dynamically adjusts the control coefficient based on real-time multipath level and received field level measurements, enabling the system to optimize convergence speed and accuracy for varying reception scenarios without increasing fundamental device complexity
Solution Approach 2:
A feedback mechanism is implemented where the recalculus unit continuously monitors environmental parameters (multipath level and received field level) and uses this information to adjust the control coefficient. This closed-loop feedback system ensures the control coefficient remains optimized for current conditions, resolving the contradiction between simplicity and adaptability
2Speed
If a high control coefficient is used, then the convergence speed is improved, but the error risk increases
Solution Approach 1:
The control coefficient value is dynamically changed based on environmental conditions rather than remaining fixed. By adjusting this critical parameter according to multipath level and received field level, the system optimizes the balance between convergence speed and error risk for each specific reception scenario, achieving high speed when conditions permit and reduced error risk when conditions require stability
3Reliability
If a low control coefficient is used, then the error risk is reduced, but the convergence speed deteriorates
Solution Approach 1:
The control coefficient is dynamically adjusted based on real-time environmental assessments. When multipath level and received field level indicate stable conditions, the coefficient is increased to accelerate convergence. When conditions suggest potential errors, the coefficient is reduced to minimize error risk, thus resolving the contradiction between speed and reliability through context-dependent parameter modification
Data Source
AI summary
A phase-diversity radio-frequency receiver, including two tuners tuned to the same frequency in order to produce two intermediate frequency signals, a combiner capable of implementing a constant modulus algorithm, CMA, in order to combine the two intermediate frequency signals into a single signal, a controller capable of transforming the single signal into a final signal having a constant envelope, the controller being parametrized by a control coefficient defining the control convergence speed, the control coefficient being recalculated permanently in accordance with at least one multi-path level.