Diversity Receiver Power Control via Signal-to-Noise Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Diversity receivers face challenges in efficiently managing battery power while maintaining signal quality, particularly in devices like Ultra Mobile PCs, where power conservation is crucial without compromising reception performance.
Innovation Solution
A method for controlling power in diversity receivers by adjusting the power dissipation in each signal path based on signal strength and additive noise characteristics, using a controller to compute signal-to-noise ratios and adjust power dynamically, with the option to deactivate paths with strong signals and activate them when necessary, combined with a maximum ratio combining algorithm to improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diversity receiver combines multiple antenna signals to improve signal quality, then reception performance is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic power control by adjusting the power consumption of individual antenna paths based on real-time signal quality measurements. The system dynamically switches between different power levels (e.g., first power level for good signal, second power level for poor signal) rather than maintaining constant high power, thereby resolving the contradiction between maintaining signal quality and reducing power consumption.
Solution Approach 2:
The system changes the power consumption parameter of each antenna path based on its signal strength and quality metrics. By varying the power level parameter dynamically according to actual reception conditions, the system achieves both good signal quality when needed and power savings when conditions permit, resolving the technical contradiction.
2Reliability
If diversity receiver maintains multiple signal paths active to ensure reception coverage, then reception coverage is improved, but battery life decreases
Solution Approach 1:
The system periodically evaluates signal quality metrics and adjusts power levels accordingly. Instead of continuously maintaining all paths at full power, the system uses periodic assessment to determine when to reduce power on individual paths, thereby extending battery life while maintaining adequate reception coverage through strategic path activation.
Solution Approach 2:
The diversity receiver autonomously monitors its own signal quality and automatically adjusts power consumption without external intervention. The system self-regulates by detecting signal conditions and independently controlling power levels of different paths, which extends battery life while maintaining reception coverage through intelligent self-management.
3Reliability
If diversity receiver uses high power levels to overcome signal fading, then signal quality is improved, but power consumption increases
Solution Approach 1:
The system applies partial power levels rather than always using maximum power. When signal conditions are good, the system uses reduced power levels (first power level), and only increases to higher power levels (second power level) when signal fading is detected. This partial action approach maintains signal quality when needed while minimizing unnecessary power dissipation during good conditions.
Solution Approach 2:
The system continuously monitors signal quality metrics and uses this feedback to adjust power consumption in real-time. Based on the feedback from signal strength and quality measurements, the system dynamically modifies power levels to match actual reception needs, thereby improving signal quality when necessary while reducing power dissipation during stable conditions.
Data Source
AI summary
The present disclosure provides a diversity receiver. The diversity receiver includes a plurality of tuners, a plurality of demodulators operatively coupled to the plurality of tuners and a controller operatively coupled to the plurality of demodulators and the plurality of tuners. Each tuner is capable of receiving a modulated signal from a path of a plurality of distinct paths. The controller determines information for each path and computes a ratio of signal strength to an additive noise for each path based on determined information. Further, the controller adjusts power of signal in each path based on comparison of computed ratio of signal strength to additive noise with a predetermined threshold. The diversity receiver also includes a MRC circuitry operatively coupled to the plurality of demodulators and configured to combine the signal of each path for obtaining a resultant combined signal having an improved ratio of signal strength to additive noise.