Digital Radio Receiver Scanning Using Spectrum Awareness Data
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Solution Overview
Problem
Existing digital radio receiver systems require multiple tuners to efficiently scan for broadcast services, which is a costly solution, and there is a need for a method to improve scanning times using a single tuner.
Innovation Solution
The method utilizes spectrum awareness data to filter the frequencies that a single tuner should scan, allowing it to tune only to frequencies likely to contain broadcast services, thereby reducing the number of frequencies to scan and improving scan times by using periods with unwanted channels to detect broadcast service data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple tuners are used to scan for broadcast services, then scanning speed and service discovery time are improved, but system cost and device complexity increase
Solution Approach 1:
The system performs preliminary actions by maintaining spectrum awareness data that identifies frequencies likely to contain broadcast services. Before scanning, the controller uses this pre-collected information to select which frequencies to scan, avoiding frequencies that are unlikely to have services. This preliminary preparation enables a single tuner to achieve scanning efficiency comparable to multiple tuners.
Solution Approach 2:
The system uses its own received broadcast service data to generate spectrum awareness information that guides future scanning operations. The controller learns from previously received services and uses this knowledge to intelligently select frequencies for scanning, enabling the single tuner to serve multiple functions efficiently.
2Measurement precision
If all frequencies are scanned to ensure complete service discovery, then measurement completeness is improved, but scanning time increases
Solution Approach 1:
The system extracts and utilizes spectrum awareness data that identifies which frequencies are likely to contain broadcast services. By taking out only the relevant frequencies from the complete frequency range and scanning only those, the system maintains service discovery completeness while significantly reducing scanning time by excluding frequencies unlikely to have services.
Solution Approach 2:
The controller changes the scanning parameter from scanning all frequencies to scanning only selected frequencies based on spectrum awareness data. This parameter change optimizes the balance between completeness and time by adjusting which frequencies are included in the scan based on learned patterns and received service information.
Data Source
AI summary
Provided is a method of scanning for broadcast services in a broadcast signal to generate a broadcast service list for use with a digital radio receiver system, and the digital radio receiver system used for scanning for broadcast services to generate a broadcast service list. The system utilises spectrum awareness data, which includes data defining one or more frequencies at which broadcast services may be receivable, in order to reduce the number of frequencies to scan such that the overall scan time may be reduced. The data in the spectrum awareness data is a filtered subset of the plurality of frequencies at which the broadcast services may be received, which allows the controller of a digital radio receiver to tune a tuner to only the frequencies that are likely to contain a broadcast service when generating or updating a broadcast service list.