Preamble Symbol Segmentation for Additional Data Channels

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Solution Overview

Problem

Existing digital broadcasting systems, such as DVB-T2 and ATSC, face challenges in efficiently transmitting additional data channels within their frame structures without compromising existing signaling and data transmission performance.

Innovation Solution

The proposed solution involves modifying the transmission parameters of the preamble symbols in the frame structure to create spare capacity, allowing for the inclusion of additional data channels by adjusting the coding rate and modulation scheme, while maintaining performance levels for signaling information and ensuring that additional channels fit within the available capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the frame structure uses standard preamble symbols for signaling and synchronization, then reliable signal detection and parameter identification is achieved, but additional data channels cannot be transmitted

Engineering Contradiction:

Improvechannel capacityVSAvoidsignaling accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The preamble symbols are segmented into multiple sub-symbols, each carrying different types of information. This allows the preamble to simultaneously provide traditional synchronization/signaling functions and carry additional data channel information without compromising the reliability of either function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The preamble symbols are designed to serve multiple functions: traditional frame synchronization, parameter identification, and additional data channel transmission. This multi-functionality enables the system to maintain backward compatibility while adding new capabilities for transmitting additional data channels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If the coding rate and modulation scheme are adjusted to increase data capacity, then additional channels can be transmitted, but signaling performance may deteriorate

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidsignaling reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Different parts of the preamble symbols use different coding rates and modulation schemes optimized for their specific functions. Critical signaling information uses robust, low-error-rate modulation, while additional data channels use higher efficiency modulation, allowing both to coexist without mutual interference.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts the coding rate and modulation scheme based on the specific requirements of different data channels and the current channel conditions. This dynamic adaptation allows the system to optimize both signaling reliability and data transmission efficiency under varying operational conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9628589B2Additional channels using preamble symbols

Publication Date: 2017.04.18 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for transmitting information is provided. The method for transmitting information comprises the steps of: mapping signalling information to one or more preamble symbols of a first frame, mapping data to one or more data symbols of the first frame, dividing additional information into two or more parts, mapping a first part of the additional information to one or more preamble symbols of the first frame, mapping a second part of the additional information to at least one of (i) one or more data symbols of the first frame, and (ii) one or more preamble symbols of a second frame and transmitting the frames.