Layered Signal Multiplexing for Power-Level Broadcast Separation
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Solution Overview
Problem
Current multiplexing technologies like TDM and FDM lack the flexibility and performance required for next-generation broadcasting systems, particularly in efficiently combining and separating 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 a combiner, power normalizer, and time interleaver, with BICM units for error correction and modulation, allowing for 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 achieved, but flexibility and performance are insufficient for next-generation broadcasting systems
Solution Approach 1:
The patent segments the signal 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 service requirements while maintaining reliable transmission through hierarchical structure.
Solution Approach 2:
The patent changes the power parameter of different signal layers, transmitting core layer signals at higher power and enhanced layer signals at lower power. This parameter change enables both flexibility in resource allocation and performance optimization for different service types.
2Adaptability or versatility
If signals are combined at different power levels, then flexibility and performance are improved, but device complexity increases
Solution Approach 1:
The patent merges the core layer signal and enhanced layer signal into a single composite signal for transmission. This combining approach maintains flexibility in handling different signal types while simplifying the transmission structure compared to separate transmission channels.
Solution Approach 2:
The multiplexing apparatus is designed to handle multiple types of signals (core layer and enhanced layer) with different power levels using a unified structure. This multi-functional design achieves flexibility without proportionally increasing device complexity.
3Productivity
If power levels are adjusted for different layers, then signal transmission efficiency is improved, but power management complexity increases
Solution Approach 1:
The patent applies preliminary power adjustment to the enhanced layer signal before combining it with the core layer signal. This preliminary action simplifies subsequent power management by pre-establishing the power relationship between layers, reducing real-time control complexity.
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 to generate a multiplexed signal, a power normalizer configured to reduce power of the multiplexed signal to power corresponding to the core layer signal, and a time interleaver configured to perform interleaving applied to both the core layer signal and the enhanced layer signal.