Pipeline LDPC Decoding with Parallel Component Code Stages
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Solution Overview
Problem
High-speed Ethernet networks face challenges in error correction due to increased interference, which complicates the implementation of low-density parity check (LDPC) codes with long codewords, requiring higher power and complexity.
Innovation Solution
A method and apparatus for decoding signals using multiple component codes in a pipeline decoder structure, where each stage executes different component codes simultaneously to generate a bit stream, reducing complexity and power dissipation while maintaining low latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDPC codes with long codewords are used for error correction in high-speed networks, then error correction capability is improved, but implementation complexity and power consumption increase
Solution Approach 1:
The patent divides the long codeword into multiple shorter component codes and processes them through parallel decoding stages. Each stage handles a subset of the codeword using simplified decoding logic, thereby reducing the complexity of individual decoding operations while maintaining the error correction benefits of long codewords through the combined effect of multiple stages.
2Reliability
If LDPC codes with long codewords are used for error correction in high-speed networks, then error correction capability is improved, but power consumption increases
Solution Approach 1:
By segmenting the decoding process into multiple stages that handle component codes in parallel, the patent reduces the computational burden on each individual stage. This segmentation allows for more efficient use of processing resources and lower power consumption per stage, while the cumulative effect of all stages maintains strong error correction capability.
Solution Approach 2:
The patent employs a multi-stage decoding approach where each stage performs partial decoding of the codeword using component codes. Rather than requiring a single complex decoding operation, the system achieves complete decoding through multiple simpler partial operations, reducing overall power consumption while maintaining decoding effectiveness.
3Productivity
If multiple decoding stages are executed simultaneously using different component codes, then decoding speed and throughput are improved, but system complexity increases
Solution Approach 1:
The patent segments the decoding process into multiple independent stages, each handling a specific component code. This segmentation enables parallel execution of decoding operations across different stages, increasing throughput. The modular structure of segmented stages makes the overall system more manageable despite the increased number of components.
Solution Approach 2:
The patent designs the decoding system with universal components that can handle multiple component codes across different stages. The same basic decoding hardware is reused across multiple stages with different configuration parameters, reducing the need for completely separate decoding circuits for each stage and thereby limiting the increase in system complexity.
Data Source
AI summary
Embodiments of a method and apparatus for decoding signals are disclosed. The method includes receiving modulated signals, generating bits representing the signals, and associated reliability of each bit. The method further includes executing a first stage of decoding the bits using a first component code, and simultaneously executing the first stage of decoding again using a second component code, and executing a second stage of decoding using the first component code. The first and second stages of decoding are used to generate the bit stream.