Radio Receiver Phase Diversity Filtering for Automatic Station Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio receivers in vehicles, equipped with phase-diversity systems for mitigating multipath interference, cannot update their list of receivable radio stations automatically due to the requirement of monopolizing the frequency band, which is incompatible with dynamic phase-diversity filtering, leading to manual updates and increased costs with additional receivers.
Innovation Solution
A method that dynamically activates or deactivates phase-diversity filtering based on the aging of the station list and the quality of the received signal, allowing automatic updates by temporarily deactivating phase-diversity filtering when necessary to update the list of receivable radio stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase-diversity filtering is activated to mitigate multipath interference, then signal quality is improved, but automatic station list updating cannot be performed because the frequency band cannot be monopolized
Solution Approach 1:
The system dynamically switches between phase-diversity filtering mode and station scanning mode based on operational requirements. The controller activates phase-diversity filtering for signal reception and automatically deactivates it temporarily when station list updating is needed, then reactivates it when updating is complete. This dynamic switching resolves the contradiction by allowing both functions to operate at appropriate times.
Solution Approach 2:
The system implements periodic monitoring of signal quality parameters and automatically triggers station list updates at intervals or when quality thresholds are met. The controller periodically evaluates whether current signal conditions allow for scanning without excessive degradation, and schedules updates accordingly. This periodic approach balances continuous signal quality maintenance with periodic automation of station list refreshing.
2Extent of automation
If a dedicated third radio receiver is added to enable automatic station list updating, then automation is improved, but system cost and complexity increase
Solution Approach 1:
The existing radio receivers are made multi-functional by enabling them to perform both signal reception with phase-diversity filtering and frequency band scanning for station list updates. The controller manages the dual roles by temporarily switching receivers between filtering mode and scanning mode as needed. This eliminates the need for a dedicated third receiver while maintaining automatic update capability.
Solution Approach 2:
The system changes operational parameters of existing receivers dynamically - switching between phase-diversity filtering activation states and frequency scanning modes. By modifying receiver operating parameters rather than adding hardware, the system achieves automatic station list updating without increasing device complexity or component count.
3Device complexity
If manual station list updating is required, then receiver complexity is reduced, but user convenience and timeliness deteriorate
Solution Approach 1:
The system provides self-service automatic station list updating by monitoring signal quality parameters and autonomously triggering scanning operations when appropriate conditions are met. The controller evaluates signal stability, duration of quality thresholds, and timing to automatically determine when updates are needed and executes them without user intervention. This maintains simple receiver configuration while dramatically improving user convenience.
Solution Approach 2:
The system implements feedback mechanisms where signal quality measurements from sensors continuously inform the controller about reception conditions. Based on this feedback, the controller automatically adjusts whether to maintain phase-diversity filtering or initiate station list updates. This closed-loop feedback enables automatic updates without requiring complex manual configuration while maintaining optimal signal quality.
Data Source
AI summary
Disclosed is a method for updating a list of radio stations that can be received by a receiver system including at least two radio receivers, the method including: ⋅determining a list of radio stations that can be received at a given instant, ⋅measuring the quality of a current radio signal, corresponding to a frequency selected and listened to, ⋅determining the ageing of the list of receivable radio stations, ⋅comparing the quality with a configurable threshold that can be upgraded at least as a function of the ageing of the list, ⋅if the quality exceeds the configurable threshold, deactivating the phase diversity filtering function and evaluating the change in the quality of the received signals and, ⋅as a function of the evaluation:—automatically updating, or—keeping unchanged the list of receivable radio stations.