MIMO LDM Broadcast Signaling for 8K UHD Compatibility
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Solution Overview
Problem
Current terrestrial broadcasting systems do not support the combination of Multiple-Input Multiple-Output (MIMO) technology and Layered Division Multiplexing (LDM) technology, which limits the transmission efficiency and compatibility with existing receivers, especially when trying to implement 8K-UHD broadcasting.
Innovation Solution
A broadcast signal transmission method that generates signaling information indicating the combination of MIMO and LDM technologies for subframes within a broadcast signal frame, allowing both existing and advanced receivers to decode core and enhanced layers, while maintaining compatibility with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO technology is introduced to improve transmission capacity and efficiency, then transmission efficiency is improved, but compatibility with existing receivers deteriorates
Solution Approach 1:
The broadcast signal is divided into multiple layers (core layer and enhanced layer) with different transmission characteristics. The core layer uses traditional LDM for backward compatibility while the enhanced layer utilizes MIMO technology for improved efficiency, allowing receivers to selectively decode based on their capabilities
Solution Approach 2:
The core layer signal is nested within the enhanced layer signal structure. Receivers can first decode the core layer for basic functionality, while advanced receivers can additionally decode the enhanced layer for improved performance, creating a nested transmission structure that accommodates both legacy and advanced receivers
2Productivity
If LDM technology is used to transmit multiple broadcasting services sharing time and frequency resources, then transmission efficiency is improved, but reception quality differentiation deteriorates
Solution Approach 1:
Different transmission qualities are assigned to different spatial layers: the core layer uses higher power and more robust modulation for inferior reception environments, while the enhanced layer uses lower power and more efficient modulation for superior reception environments, creating local quality differentiation within the combined signal
Data Source
AI summary
Disclosed herein are a broadcast signal transmission method for signaling a transmission structure based on a combination of LDM technology and MIMO technology and an apparatus using the same. The broadcast signal transmission method may include generating first signaling information, indicating a transmission structure based on a combination of Multiple-Input Multiple-Output (MIMO) technology and Layered Division Multiplexing (LDM) technology, for a first subframe of a current broadcast signal frame, generating second signaling information, indicating a transmission structure based on a combination of the MIMO technology and the LDM technology, for a current subframe subsequent to the first subframe, and generating a broadcast signal using the first signaling information and the second signaling information.