LDPC Bit Segmentation for Receiver-Aware Decoding Reliability
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Solution Overview
Problem
In communications systems, the reliability of data transmission is compromised due to interference and errors in complex radio propagation environments, and existing error-correcting codes like LDPC do not efficiently adapt to varying information processing capabilities of receiving devices.
Innovation Solution
A data processing method that determines the length of encoded bit segments based on the size of the circular buffer and information processing capability of the receiving device, reducing storage costs and decoding complexity by optimizing the inclusion of punctured information bits and using LDPC encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDPC encoding is used with fixed code rate, then error correction capability is improved, but adaptability to different receiving device capabilities deteriorates
Solution Approach 1:
The patent implements dynamic adaptation by allowing the transmitting device to adjust the code rate of LDPC encoding based on the information processing capability of the receiving device. The transmitting device determines the receiving device's capability and selects an appropriate code rate from multiple available rates, enabling the system to dynamically optimize error correction capability while adapting to different receiving device specifications.
2Productivity
If larger coded block size is transmitted, then data transmission capacity is improved, but decoding complexity and storage requirements of receiving device increase
Solution Approach 1:
The patent segments the coded bit stream into multiple encoded bit segments, where each segment corresponds to a code block with size within the receiving device's capability range. The transmitting device divides the total coded bits into several segments and transmits them separately, allowing the receiving device to decode each segment independently using its limited processing capability, thereby enabling high-capacity transmission without overwhelming the receiver's decoding complexity.
3Reliability
If more encoded bits are transmitted to ensure reliability, then communication reliability is improved, but storage overhead and buffer requirements increase
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portion of encoded bits required for the receiving device to achieve reliable decoding. Instead of transmitting the full coded block, the transmitting device determines the maximum number of bits the receiving device can process and transmits only that portion, segmented appropriately. This ensures communication reliability is achieved without excessive storage overhead in the receiving device's buffer.
Data Source
AI summary
This application provides a data processing method and a communications device. The data processing method includes: determining, by a first communications device, NCB, based on a size of the circular buffer of the communications device and an information processing capability of a second communications device; and obtaining, by the first communications device, a second encoded bit segment from a first encoded bit segment having a length of NCB. According to the data processing method and the communications device provided in this application, decoding complexity of the communications device can be reduced and communication reliability can be improved.