Radio Receiving Device Noise Indexing for Station Search
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Solution Overview
Problem
Conventional radio receiving devices fail to correctly search for broadcast stations due to the influence of multipath noise and adjacent interference noise not being considered in relation to the received electric field strength level.
Innovation Solution
A radio receiving device that determines the received electric field strength level and assigns point values to noise components, using specific arithmetic expressions to calculate an index value that considers the influence of multipath and adjacent interference noise, thereby selecting or excluding broadcast stations based on these values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the noise component quantities of multipath noise and adjacent interference noise are simply added together to determine search targets, then the calculation process is simple, but the influence of received electric field strength level on noise impact is not considered, resulting in incorrect broadcast station search
Solution Approach 1:
The patent applies local quality by assigning different evaluation weights to multipath noise and adjacent interference noise based on the received electric field strength level. Instead of uniformly treating all noise components, the system selectively emphasizes certain noise types depending on the signal strength condition, thereby improving search accuracy without significantly increasing computational complexity
Solution Approach 2:
The patent changes the evaluation parameters dynamically based on the received electric field strength level. When the signal is weak, adjacent interference noise is given higher weight; when the signal is strong, multipath noise becomes more significant. This parameter adaptation resolves the contradiction by making the evaluation process both accurate and context-dependent
2Measurement precision
If different arithmetic expressions are used for different received electric field strength levels to index noise influence, then the broadcast station search accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamics by making the arithmetic expression selection dependent on the received electric field strength level. The system dynamically switches between different evaluation formulas based on signal conditions, allowing accurate noise assessment while keeping the complexity management through automated level-based selection
Solution Approach 2:
The patent applies preliminary action by pre-defining multiple arithmetic expressions for different electric field strength levels. The appropriate expression is selected in advance based on the measured signal level, avoiding complex real-time calculations and reducing the burden on the processing system while maintaining high search accuracy
Data Source
AI summary
The influence of a multipath noise and an adjacent interference noise on the quality of reception of a broadcast is indexed in accordance with a received electric field strength level, and a broadcast station which is a station selection target is searched for using this index value.