LDM-MIMO Broadcast Signaling Segmentation for Compatibility

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Solution Overview

Problem

Current terrestrial broadcast systems do not support the combination of Multiple-Input Multiple-Output (MIMO) and Layered-Division Multiplexing (LDM) technologies, leading to compatibility issues with existing receivers and inefficient transmission of enhanced layer signals.

Innovation Solution

Generating specific signaling information to indicate the application of MIMO technology to an enhanced layer using LDM, including first signaling information in L1-Basic and L1-Detail signaling, and second signaling information detailing MIMO application methods such as stream-combining, IQ polarization interleaving, and phase-hopping, to enable both core and enhanced layer signal reconstruction in receivers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If MIMO technology is applied only to enhanced layer signal without combination signaling, then compatibility with existing receivers is maintained, but transmission efficiency and service capability are limited

Engineering Contradiction:

Improveservice capabilityVSAvoidsignaling information

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The signaling information is segmented into two parts: first signaling information indicating whether MIMO is applied to the enhanced layer, and second signaling information indicating the MIMO application method. This segmentation allows existing receivers to ignore the new signaling fields while new receivers can fully utilize the combined MIMO-LDM technology

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The signaling structure is designed to serve multiple functions: it maintains backward compatibility with existing receivers while simultaneously enabling advanced MIMO-LDM combined technology for new receivers. The signaling fields can be interpreted differently by different receiver types, achieving universal compatibility

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If new signaling information is added to indicate MIMO-LDM combination, then transmission efficiency is improved, but complexity of signaling structure increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidsignaling structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The signaling structure applies local quality by adding specific signaling fields only where needed (in L1-Basic and L1-Detail signaling) rather than redesigning the entire signaling structure. This allows efficient MIMO-LDM transmission while minimizing overall signaling complexity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The first signaling information is transmitted in advance to indicate whether MIMO is applied to the enhanced layer, allowing receivers to prepare appropriate processing methods before receiving the actual data, thereby improving transmission efficiency

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If existing transmission signaling is used without modification, then simplicity is maintained, but ability to describe MIMO-LDM combination is insufficient

Engineering Contradiction:

Improvetechnology description capabilityVSAvoidMIMO application information

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

New signaling fields are introduced as intermediaries to convey MIMO application information. These signaling fields act as mediators between the transmitted signal and the receiver, enabling the description of MIMO-LDM combination while maintaining the original signal structure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The solution adds a new dimension to the signaling structure by introducing hierarchical signaling (L1-Basic and L1-Detail) with specific fields for MIMO indication. This dimensional expansion allows comprehensive description of MIMO-LDM combination without disrupting existing signaling

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11855716B2Apparatus for transmitting broadcast signal for signaling information about combination of LDM and MIMO and method using the same

Publication Date: 2023.12.26 ELECTRONICS & TELECOMM RES INST

AI summary

Disclosed herein are a method for transmitting a broadcast signal for signaling information about a combination of Layered-Division Multiplexing (LDM) technology and Multiple-Input Multiple-Output (MIMO) technology and an apparatus using the method. The method includes generating first signaling information indicating whether MIMO technology is applied to an enhanced layer by LDM technology, generating second signaling information indicating an MIMO application method when the MIMO technology is applied to the enhanced layer, and generating a broadcast signal using the first signaling information and the second signaling information.