WLAN LDPC Rate Extension for Beamforming Throughput Gains
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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 achieving extremely high throughput, necessitating the development of higher coding rates such as 7/8 and 11/12 to enhance system performance.
Innovation Solution
Implementing new coding rates of 7/8 and 11/12 in next-generation WLAN systems using existing low-density parity-check (LDPC) codes defined in IEEE 802.11n/ac/ax standards, with specific LDPC parameters and encoding processes that allow for improved throughput while reusing existing encoder and decoder designs, and incorporating these rates into modulation and coding schemes with 4096-QAM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher coding rates (7/8, 11/12) are implemented to achieve extremely high throughput, then system throughput is improved, but implementation complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing new coding rate parameters (7/8 and 11/12) while maintaining compatibility with existing LDPC code structures. This allows the system to achieve higher throughput by changing the coding rate parameter without fundamentally altering the encoder/decoder architecture, thus improving productivity while controlling complexity.
Solution Approach 2:
The patent achieves universality by designing the LDPC encoder and decoder to handle multiple coding rates (5/6, 7/8, 11/12) using the same fundamental code structure. The existing LDPC codes from IEEE 802.11n/ac/ax standards are extended to support higher coding rates, allowing a single universal encoder/decoder design to serve multiple throughput requirements without increasing implementation complexity.
2Productivity
If new coding rates are introduced to leverage transmit beamforming potential, then throughput performance is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by making the coding rate selectable and adaptable based on channel conditions and beamforming requirements. The system can dynamically choose between coding rates 5/6, 7/8, and 11/12 depending on the transmit beamforming configuration and channel quality, allowing optimal throughput performance without permanently increasing device complexity.
Solution Approach 2:
The patent changes the coding rate parameter from a fixed value (5/6) to a selectable set of values (5/6, 7/8, 11/12), enabling the system to adapt to different beamforming scenarios and achieve higher throughput performance while maintaining compatibility with existing LDPC code implementations.
3Device complexity
If existing LDPC codes are reused for new coding rates, then implementation complexity is reduced, but coding rate flexibility is limited
Solution Approach 1:
The patent achieves universality by extending the existing LDPC code framework to support multiple coding rates (5/6, 7/8, 11/12) within a single unified encoder/decoder implementation. This allows the system to maintain low implementation complexity by reusing existing LDPC codes while simultaneously gaining coding rate flexibility through parameter adjustments and code extension techniques.
Solution Approach 2:
The patent applies segmentation by dividing the code extension process into manageable parts: using existing LDPC base codes and extending them with additional parity bits or information bits to achieve higher coding rates. This segmented approach allows incremental flexibility enhancement without requiring complete redesign of the coding system.
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.