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, where existing methods fail to minimize performance degradation.
Innovation Solution
A transmitter identification signal is generated using a TxID code generator with specific polynomials and registers, injected into the host broadcasting signal in the time domain, ensuring synchronization and minimal performance impact, suitable for ATSC 3.0 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transmitter identification signal is transmitted in a single frequency network, then transmitter identification capability is improved, but signal interference and performance degradation occur
Solution Approach 1:
The transmitter identification signal is transmitted periodically within specific preamble symbols (first, second, and third preamble symbols) rather than continuously, allowing receivers to identify transmitters at regular intervals while minimizing continuous interference with the host broadcasting signal
Solution Approach 2:
The identification signal is injected into only specific portions of the transmission frame (preamble symbols) rather than the entire signal stream, providing sufficient transmitter identification capability while limiting the extent of signal modification and potential interference
2Measurement precision
If the transmitter identification signal is injected into the host broadcasting signal, then transmitter identification is enabled, but signal quality and performance degrade
Solution Approach 1:
The identification signal is injected into the preamble symbols which serve as an intermediary structure between the transmission frame and the host broadcasting signal. This intermediary approach allows identification signal insertion while maintaining the integrity of the main broadcasting content
Solution Approach 2:
The identification signal modification is applied only to specific preamble symbols rather than the entire host signal, providing the necessary identification capability while minimizing the overall impact on signal quality and broadcasting performance
3Area of stationary object
If transmitter identification signals are transmitted simultaneously from multiple transmitters, then network coverage is improved, but interference between transmitters increases
Solution Approach 1:
Multiple transmitters transmit identification signals periodically at the same preamble symbol positions, creating a synchronized transmission pattern that allows receivers to distinguish between transmitters while maintaining coordinated network operation and reducing random interference
Solution Approach 2:
The same preamble symbol structure serves multiple functions: carrying the host broadcasting signal, embedding transmitter identification information, and enabling synchronized transmission across multiple transmitters in the network
Data Source
AI summary
An apparatus for transmitting broadcasting signal using transmitter identification 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; 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.