LDPC Parity Interleaving for Fixed-Length Broadcast Signaling

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Solution Overview

Problem

Current channel encoding and modulation techniques for signaling information in broadcast systems lack robustness and efficiency, necessitating the development of new methods optimized for signaling information transmission.

Innovation Solution

A parity interleaving apparatus and method that segment and group-wise interleave parity bits of an LDPC codeword, optimizing puncturing and interleaving based on specific sequences and code rates to enhance transmission efficiency for signaling information in broadcast systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional channel encoding and modulation techniques are used for signaling information transmission, then the transmission can be performed with existing standards, but the robustness and efficiency of signaling information transmission deteriorates

Engineering Contradiction:

Improverobustness of signaling information transmissionVSAvoidoptimization for signaling information

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes key parameters of the channel encoding and modulation techniques by introducing a new group-wise parity interleaving method with specific interleaving orders and group configurations. This optimizes the code rate and block length parameters to be specifically suited for signaling information transmission, thereby improving robustness while maintaining adaptability to broadcast system requirements

Inventive Principle:

Principle #35Parameter changes

2Productivity

If new channel encoding and modulation techniques are developed for signaling information, then the robustness and efficiency improve, but the complexity of the encoding and decoding apparatus increases

Engineering Contradiction:

Improvetransmission efficiency of signaling informationVSAvoidcomplexity of parity interleaving apparatus

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the parity bits into multiple groups and applies group-wise interleaving with specific interleaving orders. This segmentation approach improves transmission efficiency by optimizing the distribution of parity bits while keeping the complexity manageable through structured group configurations and predefined interleaving sequences

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary actions by pre-defining the group-wise interleaving order and group configurations before transmission. This allows the encoding apparatus to be optimized for efficiency while the decoding apparatus can use the same predefined parameters, reducing the need for complex real-time calculations and thereby limiting the increase in device complexity

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11695433B2Parity interleaving apparatus for encoding fixed-length signaling information, and parity interleaving method using same

Publication Date: 2023.07.04 ELECTRONICS & TELECOMM RES INST

AI summary

A parity interleaving apparatus and method for fixed length signaling information are disclosed. A parity interleaving apparatus according to an embodiment of the present invention includes a processor configured to generate a parity bit string for parity puncturing by segmenting parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15, into a plurality of groups, and group-wise interleaving the groups using an order of group-wise interleaving; and memory configured to provide the parity bit string for parity puncturing to a parity puncturing unit.