Shared LDPC Decoder Architecture for Multi-Rate Hardware Reuse
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Solution Overview
Problem
Current communication systems employing LDPC codes face challenges in reducing hardware complexity and latency, particularly in high data rate applications, due to the need for multiple hardware components and complex error correction schemes.
Innovation Solution
The design of LDPC codes with shared characteristics allows for efficient hardware implementation by enabling the sharing of resources within communication devices, using a base LDPC matrix to construct various code rates, and employing a fully parallel decoding approach that selectively enables circuitry subsets based on the selected LDPC code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple hardware components are used for different code rates, then code rate versatility is improved, but hardware complexity increases
Solution Approach 1:
The patent implements a universal LDPC decoder architecture that can handle multiple code rates (1/2, 2/3, 3/4, 5/6) using the same hardware components. The base LDPC matrix is constructed with dimensions that accommodate all code rates, and the decoder uses configurable parameters to adapt to different code rates without requiring separate hardware for each rate.
Solution Approach 2:
The patent employs dynamic configuration of the LDPC decoder where the same hardware structure can be reconfigured for different code rates through parameter settings. The base matrix dimensions and submatrix configurations are dynamically adjusted based on the selected code rate, allowing the system to adapt its behavior rather than requiring static dedicated hardware for each rate.
2Adaptability or versatility
If multiple hardware components are used for different code rates, then code rate versatility is improved, but device real estate increases
Solution Approach 1:
The patent implements a universal LDPC decoder architecture that can handle multiple code rates (1/2, 2/3, 3/4, 5/6) using the same hardware components. The base LDPC matrix is constructed with dimensions that accommodate all code rates, and the decoder uses configurable parameters to adapt to different code rates without requiring separate hardware for each rate.
Solution Approach 2:
The patent merges the functionality of multiple code rate-specific decoders into a single unified decoder structure. By combining the handling of different code rates into one hardware implementation using a base matrix with dimensions accommodating all rates, the system reduces the total area required compared to having separate dedicated hardware for each code rate.
3Adaptability or versatility
If multiple hardware components are used for different code rates, then code rate versatility is improved, but power consumption increases
Solution Approach 1:
The patent implements a universal LDPC decoder architecture that can handle multiple code rates (1/2, 2/3, 3/4, 5/6) using the same hardware components. The base LDPC matrix is constructed with dimensions that accommodate all code rates, and the decoder uses configurable parameters to adapt to different code rates without requiring separate hardware for each rate.
Solution Approach 2:
The patent merges the functionality of multiple code rate-specific decoders into a single unified decoder structure. By combining the handling of different code rates into one hardware implementation using a base matrix with dimensions accommodating all rates, the system reduces the total area required compared to having separate dedicated hardware for each code rate.
4Reliability
If complex error correction schemes are used, then error correction performance is improved, but hardware complexity increases
Solution Approach 1:
The patent segments the LDPC decoder into modular components including a base matrix construction module, a submatrix configuration module, and a decoding engine. This segmentation allows complex error correction functionality to be broken down into manageable, reusable modules that can be configured for different code rates without increasing overall system complexity.
Solution Approach 2:
The patent achieves different code rates by changing parameters of the base LDPC matrix (dimensions, submatrix configurations) rather than changing the fundamental hardware architecture. This allows complex error correction for multiple code rates to be implemented through parameter configuration rather than through complex hardware modifications.
Data Source
AI summary
Communication device architecture for in-place constructed LDPC (Low Density Parity Check) code. Intelligent design of LDPC codes having similar characteristics there between allows for a very efficient hardware implementation of a communication device that is operative to perform encoding of respective information bit groups using more than one type of LDPC codes. A switching module can select any one of the LDPC codes within an in-place LDPC code for use by an LDPC encoder circuitry to generate an LDPC coded signal. Depending on which sub-matrices of a superimposed LDPC matrix are enabled or disabled, one of the LDPC matrices from within an in-place LDPC code matrix set may be selected. A corresponding, respective generator matrix may be generated from each respective LDPC matrix. Selection among the various LDPC codes may be in accordance with a predetermined sequence, of based operating conditions of the communication device or communication system.