WLAN LDPC Coding Rates for Higher Throughput Reuse
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Solution Overview
Problem
Current WLAN systems, particularly those adhering to the IEEE 802.11 standards, are limited by coding rates that do not fully leverage the potential of transmit beamforming for extremely high-throughput applications, necessitating higher coding rates to enhance system throughput.
Innovation Solution
The implementation of new coding rates such as 7/8 and 11/12, based on existing low-density parity-check (LDPC) codes defined in IEEE 802.11n/ac/ax standards, using specific parameters and processes that allow for improved LDPC encoder and decoder designs, enabling higher system throughput while reusing existing infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher coding rates (7/8, 11/12) are implemented to improve system throughput, then productivity increases by 5-10%, but device complexity increases due to new encoder/decoder requirements
Solution Approach 1:
The patent applies parameter changes by modifying the coding rate parameter from traditional values (1/2, 2/3, 3/4, 5/6) to new extreme high coding rates (7/8, 11/12). This allows the system to achieve higher throughput by transmitting more data bits per channel use, directly resolving the contradiction by changing the fundamental operating parameter of the communication system.
Solution Approach 2:
The patent achieves universality by making the LDPC encoder and decoder designs compatible with both traditional coding rates and new extreme high coding rates. The same encoder architecture can operate at different coding rates by adjusting parameters such as the number of parity bits and code length, thereby reducing device complexity while maintaining improved productivity.
2Productivity
If new coding rates are introduced to achieve extremely high throughput, then productivity improves, but ease of manufacture deteriorates due to implementation complexity
Solution Approach 1:
The patent applies segmentation by dividing the codebook into multiple segments or tables, each optimized for specific coding rates and transmission conditions. This allows the system to implement new high coding rates by selecting appropriate code segments rather than designing entirely new encoding schemes, thereby improving throughput while maintaining ease of manufacture through modular codebook structures.
Solution Approach 2:
The patent applies preliminary action by pre-computing and storing optimized LDPC code parameters, parity check matrices, and decoding metrics in lookup tables before actual transmission. This preparation work enables the encoder and decoder to operate efficiently at new coding rates without complex real-time calculations, thus improving throughput while reducing implementation complexity.
3Ease of manufacture
If existing LDPC code structures are reused to reduce implementation complexity, then ease of manufacture improves, but adaptability deteriorates for new coding rates
Solution Approach 1:
The patent applies dynamics by making the LDPC code parameters dynamic and configurable based on transmission conditions and desired coding rates. The system can dynamically adjust code length, number of parity bits, and selecting from different base matrices to support new coding rates (7/8, 11/12) while reusing the fundamental LDPC structure, thereby achieving both ease of manufacture and adaptability.
Solution Approach 2:
The patent applies composite materials by combining traditional LDPC code structures with new parameter configurations and hybrid coding schemes. The composite approach integrates existing proven LDPC techniques with novel parameter sets and codebook designs, creating a versatile encoding system that maintains implementation simplicity while achieving adaptability to new high coding rates.
Data Source
AI summary
A method of extremely high coding rates for next-generation wireless local area network (WLAN) systems involves coding an input data at a first coding rate using codes designed for coding up to a second coding rate lower than the first coding rate to provide a coded data. The method also involves wirelessly transmitting the coded data.