Layered Division Multiplexing Signal Frame Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current broadcast signal transmission technologies, such as TDM and FDM, lack the flexibility and performance required for next-generation broadcasting systems, particularly in efficiently multiplexing and demultiplexing signals across different power levels and Physical Layer Pipes (PLPs).
Innovation Solution
A broadcast signal frame structure is developed, incorporating a combiner to combine core and enhanced layer signals at different power levels, a power normalizer to adjust the power, a time interleaver to generate a time-interleaved signal, and a frame builder to create a broadcast signal frame with a preamble that includes PLP and layer identification information, enabling efficient multiplexing and demultiplexing of signals across multiple layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDM or FDM is used for signal multiplexing, then signal transmission is supported, but flexibility and performance are insufficient for next-generation broadcasting systems
Solution Approach 1:
The signal is divided into multiple layers (core layer and enhanced layer) with different power levels, allowing independent processing and multiplexing of each layer. This segmentation enables flexible resource allocation while maintaining reliable transmission through hierarchical structure
Solution Approach 2:
The patent introduces power level as an additional dimension for signal multiplexing, beyond the traditional time and frequency dimensions. By combining core layer and enhanced layer signals at different power levels, the system achieves greater flexibility and performance simultaneously
2Productivity
If traditional multiplexing is used, then signal transmission is achieved, but time and frequency resources are not fully utilized
Solution Approach 1:
The patent merges TDM and FDM approaches by combining signals in both time and frequency domains across multiple power levels. This unified multiplexing structure enables 100% utilization of time and frequency resources while managing complexity through systematic layer handling
3Productivity
If signals are combined at different power levels, then multiplexing efficiency is improved, but signal power management becomes more complex
Solution Approach 1:
The patent systematically varies power levels as a key parameter across different signal layers. By defining core layer and enhanced layer with specific power relationships, the system achieves efficient multiplexing while managing power complexity through standardized parameter control
Data Source
AI summary
An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling time interleaver information shared by the core layer signal and the enhanced layer signal, using the time-interleaved signal.