Transmitter Control for Multi-Frequency RDS/RDS2 Data Coordination
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Solution Overview
Problem
Conventional RDS/RDS2 data broadcasting systems face limitations in data transmission capacity and scalability, leading to conflicts when multiple transmitters transmit the same data at the same frequency, resulting in receiver failure.
Innovation Solution
A method and system for controlling transmitters to compare and synchronize auxiliary data across different frequencies, allowing multiple transmitters to transmit distinct RDS/RDS2 data streams, thereby preventing redundant data transmission and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple transmitters transmit RDS auxiliary data at the same frequency, then data broadcasting coverage is expanded, but receiver failure occurs due to data conflicts
Solution Approach 1:
The patent segments the data transmission by frequency, where different transmitters use different frequencies (57kHz for RDS, 66.5kHz/71.25kHz/76kHz for RDS2) to transmit auxiliary data. This segmentation prevents data conflicts while expanding coverage, as receivers can selectively receive data from appropriate frequency sources without interference.
Solution Approach 2:
The patent introduces frequency as an additional dimension for data transmission. Instead of multiple transmitters competing at the same frequency, the system utilizes multiple frequency layers (RDS and RDS2 bands) to accommodate multiple transmitters, thereby expanding coverage without causing conflicts.
2Quantity of substance
If RDS data stream is expanded using additional subcarriers, then data transmission capacity is increased, but system complexity increases
Solution Approach 1:
The patent implements a universal auxiliary data transmission system that can operate on multiple frequencies (57kHz RDS and 66.5kHz/71.25kHz/76kHz RDS2 subcarriers). The same auxiliary data structure and transmission protocol are used across all frequencies, allowing the system to expand data capacity without proportionally increasing complexity through standardized multi-frequency operation.
3Reliability
If transmitters transmit identical auxiliary data at different frequencies, then data redundancy occurs, but transmission reliability is improved
Solution Approach 1:
The patent implements a feedback mechanism where transmitters monitor which frequencies are already transmitting identical auxiliary data. When a transmitter detects that the same auxiliary data is being transmitted on another frequency, it suppresses its own transmission on that frequency, eliminating redundancy while maintaining reliability through the other transmitter's signal.
Data Source
AI summary
Disclosed herein is a method for controlling a transmitter may include transmitting FM radio broadcast to a receiver, transmitting auxiliary data of a radio data system to the receiver and another transmitter at a first frequency, receiving auxiliary data of the radio data system at a second frequency from the other transmitter, and stopping the transmission of the auxiliary data of the radio data system at the first frequency based on that the auxiliary data of the radio data system at the second frequency corresponds to the auxiliary data of the radio data system at the first frequency.