LDPC Rate Matching for Long-Range Reliable Wireless Links
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Solution Overview
Problem
Existing wireless communication standards face challenges in achieving extended long range and high reliability due to issues with LDPC rate matching, puncturing, and shortening ratios, particularly in the context of IEEE 802.11bn, which affects the transmission power and efficiency of wireless devices.
Innovation Solution
Proposed solutions include enhancing LDPC rate matching algorithms, modifying tone plans and pilot locations, using power boosting for pilot signals, and optimizing MAC layer support to improve transmission power and reliability, along with innovative preamble structures and user information techniques for non-ELR PPDUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDPC rate matching algorithms are enhanced to reduce puncturing or shortening ratios, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying LDPC rate matching algorithms to optimize puncturing and shortening ratios. This involves adjusting coding parameters and rate matching configurations to achieve better transmission reliability without excessive complexity increase.
Solution Approach 2:
The patent implements dynamic rate matching techniques that adapt to different transmission conditions. The system dynamically adjusts puncturing patterns and shortening ratios based on channel conditions and data characteristics, allowing the system to optimize reliability for each specific transmission scenario.
2Length of stationary object
If power boosting is applied to pilot signals to enhance transmission range, then transmission power is improved, but energy consumption increases
Solution Approach 1:
The patent applies local quality by selectively boosting power only for pilot signals rather than all transmitted data. This localized power enhancement ensures that pilot signals have sufficient power for accurate channel estimation and synchronization, while other data portions transmit at normal power levels, thus reducing overall energy consumption compared to uniform power boosting.
Solution Approach 2:
The patent uses preliminary action by enhancing pilot signals before data transmission. The boosted pilot signals enable the receiver to accurately estimate channel characteristics and synchronize timing in advance, which facilitates more efficient decoding of subsequent data portions and reduces the need for additional power-intensive error correction operations.
3Productivity
If tone plans and pilot locations are modified to optimize transmission, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying tone plans and pilot signal locations to optimize transmission efficiency. This involves adjusting frequency domain parameters and time-frequency resource allocation to achieve better spectral efficiency and reduced interference, while managing the complexity through systematic parameter optimization.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to enhanced connectivity. A device may receive a data payload and modulation and coding scheme (MCS) information for transmission. The device may select a low-density parity-check (LDPC) codeword size based on the data payload size and the MCS information. The device may encode the data payload into at least one LDPC codeword according to the selected LDPC codeword size. The device may transmit the encoded LDPC codeword using a wireless interface.