Adaptive SC-LDPC Decoding Control for Window Size and Iterations

Solution Overview

Problem

Existing decoding apparatuses for spatially coupled low-density parity-check codes experience increased processing delay and power consumption due to iterative window size adjustments without considering error occurrence conditions, leading to excessive decoding processing.

Innovation Solution

A decoding apparatus with an error-correction decoder and a decoding parameter control unit that iteratively performs decoding with adjustable window size and number of iterations based on decoding results, updating parameters to optimize error correction performance and reduce power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the window size is increased by a predetermined amount without considering error occurrence conditions, then error correction performance is improved, but processing delay and power consumption increase

Engineering Contradiction:

Improveerror correction performanceVSAvoidprocessing delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The window size is made dynamically adjustable based on error occurrence conditions. The decoding apparatus changes the window size according to the actual decoding needs: using a first window size when errors are detected and a second (smaller) window size when no errors occur, thereby optimizing both error correction performance and processing efficiency

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The decoding apparatus changes the window size parameter based on error occurrence conditions. When errors are detected in decoded data, the window size is increased to improve error correction; when no errors occur, the window size is reduced to decrease processing delay and power consumption

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the window size is increased by a predetermined amount without considering error occurrence conditions, then error correction performance is improved, but power consumption increases

Engineering Contradiction:

Improveerror correction performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The window size is made dynamically adjustable based on error occurrence conditions. The decoding apparatus changes the window size according to the actual decoding needs: using a first window size when errors are detected and a second (smaller) window size when no errors occur, thereby optimizing both error correction performance and processing efficiency

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The decoding apparatus changes the window size parameter based on error occurrence conditions. When errors are detected in decoded data, the window size is increased to improve error correction; when no errors occur, the window size is reduced to decrease processing delay and power consumption

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If iterative decoding processing is performed with fixed window size and number of iterations, then decoding simplicity is maintained, but error correction performance is insufficient under varying channel conditions

Engineering Contradiction:

Improvedecoding processing simplicityVSAvoiderror correction performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The decoding apparatus dynamically adjusts the window size based on error occurrence conditions detected during iterative decoding. When errors are detected, the window size is increased to improve error correction performance; when no errors occur, the window size is reduced. This dynamic adjustment maintains decoding simplicity while adapting to varying channel conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The decoding apparatus uses feedback from error detection results to adjust the window size. The error detection unit monitors decoded data and provides feedback to the window size adjustment unit, which then modifies the window size accordingly. This feedback mechanism enables adaptive error correction performance while maintaining relatively simple decoding processing

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11750216B2Decoding apparatus, control circuit, and storage medium

Publication Date: 2023.09.05 MITSUBISHI ELECTRIC CORP

AI summary

A decoder that is a decoding apparatus includes an error-correction decoder that executes error correction decoding processing of iteratively performing decoding processing with a window size and the number of decoding iterations indicated by decoding parameters, on received data converted into a spatially coupled low-density parity-check code, and a decoding parameter control unit that updates the decoding parameters on the basis of a decoding result obtained by the iteratively executed decoding processing.