Transmitter Identification Signal Injection in ATSC 3.0 Broadcasting
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Solution Overview
Problem
In single frequency networks, interference issues arise due to the use of a single frequency among transmitters and repeaters, necessitating effective transmitter identification techniques for next-generation broadcasting communication systems like ATSC 3.0, while minimizing performance degradation.
Innovation Solution
An apparatus and method for transmitting a transmitter identification signal by generating a scaled TxID signal using an injection level code, injecting it into the host broadcasting signal in the time domain, and synchronizing it with the host signal, ensuring efficient identification and minimal performance impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transmitter identification signal is injected into the host broadcasting signal, then transmitter identification capability is improved, but signal performance degradation occurs
Solution Approach 1:
The patent applies parameter changes by adjusting the injection level of the transmitter identification signal relative to the host broadcasting signal. The injection level is controlled within a specific range (0-31) where higher values indicate stronger identification signal injection. This allows optimization between identification capability and signal performance by selecting appropriate injection levels for different operating conditions.
Solution Approach 2:
The patent implements dynamics by making the injection level adjustable and controllable rather than fixed. The system can dynamically change the injection level parameter to adapt to different scenarios, such as varying channel conditions, receiver capabilities, and interference levels, thereby balancing identification accuracy with signal quality.
2Measurement precision
If the transmitter identification signal is transmitted at higher power levels, then identification accuracy is improved, but interference in the single frequency network increases
Solution Approach 1:
The patent uses parameter changes by controlling the injection level parameter to adjust the power level of the transmitter identification signal. By varying this parameter, the system can achieve sufficient identification accuracy while preventing excessive power levels that would cause harmful interference in the single frequency network.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors signal conditions and adjusts the injection level accordingly. This feedback control ensures that the transmitter identification signal maintains adequate power for accurate identification without exceeding levels that would create harmful interference in the network.
3Difficulty of detecting and measuring
If the transmitter identification signal is injected with higher scaling, then signal detectability is improved, but performance degradation of the host signal increases
Solution Approach 1:
The patent applies parameter changes through the injection level parameter that controls the scaling between the transmitter identification signal and the host broadcasting signal. By optimizing this parameter, the system achieves sufficient detectability of the identification signal while minimizing degradation of the host signal performance.
Data Source
AI summary
An apparatus for transmitting broadcasting signal using transmitter identification scaled by 4-bit injection level code and method using the same are disclosed. An apparatus for transmitting broadcasting signal according to an embodiment of the present invention includes a waveform generator configured to generate a host broadcasting signal; a transmitter identification signal generator configured to generate a transmitter identification signal for identifying a transmitter, the transmitter identification signal scaled by an injection level code; and a combiner configured to inject the transmitter identification signal into the host broadcasting signal in a time domain so that the transmitter identification signal is transmitted synchronously with the host broadcasting signal.