Layered Signal Multiplexing with Power-Level Separation
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Solution Overview
Problem
Existing signal multiplexing technologies like TDM and FDM lack the flexibility and performance required for next-generation broadcasting systems, necessitating a new approach that can efficiently multiplex and demultiplex signals at different power levels.
Innovation Solution
A signal multiplexing apparatus and method that combines core and enhanced layer signals at different power levels using Bit-Interleaved Coded Modulation (BICM) units, with power adjustment and interleaving, allowing for efficient multiplexing and demultiplexing of signals through a combiner and time interleaver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDM or FDM is used for signal multiplexing, then signal transmission is achieved, but flexibility and performance are insufficient for next-generation broadcasting systems
Solution Approach 1:
The patent segments signals into multiple layers (core layer and enhanced layer) with different power levels, allowing independent processing and transmission of each layer. This segmentation enables flexible adaptation to different channel conditions while maintaining reliable transmission of critical core layer signals, resolving the contradiction between flexibility and performance in next-generation broadcasting systems.
2Adaptability or versatility
If signals are multiplexed at different power levels, then flexibility and performance are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple layer signals at different power levels into a single multiplexed signal for transmission. By merging the core layer and enhanced layer signals through power-level-based multiplexing, the system achieves flexible adaptation without requiring separate transmission channels, thereby improving performance while controlling device complexity through unified signal processing.
3Productivity
If core layer and enhanced layer signals are combined at different power levels, then efficient multiplexing is achieved, but signal processing complexity increases
Solution Approach 1:
The patent changes the power level parameter of signals to achieve efficient multiplexing. By assigning different power levels to core layer and enhanced layer signals, the system enables simple power-level-based separation and processing at the receiver, improving multiplexing efficiency while minimizing signal processing complexity through parameter-based differentiation rather than complex processing algorithms.
Data Source
AI summary
An apparatus and method for multiplexing signals using layered division multiplexing are disclosed. A signal multiplexing apparatus according to an embodiment of the present invention includes a combiner configured to combine a core layer signal and an enhanced layer signal at different power levels, and a time interleaver configured to perform interleaving applied to both the core layer signal and the enhanced layer signal.