UWB PHR LDPC Coding for Shorter Transmission and Reliable Demodulation
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Solution Overview
Problem
The coding performance of the physical layer header (PHR) field in ultra-wideband (UWB) wireless communication needs improvement, and the transmission duration of the PHR field is excessive, leading to demodulation bottlenecks and interference with other wireless devices.
Innovation Solution
A new codeword set is designed for encoding the PHR information, using low-density parity-check (LDPC) coding to improve coding performance and reduce transmission duration, with specific codeword lengths and Hamming distances optimized for efficient demodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If convolutional coding is used for the PHR field, then the coding structure is simple and easy to implement, but the coding performance needs further improvement
Solution Approach 1:
The patent changes the coding parameters by transitioning from convolutional coding to LDPC coding with specific code rates (1/2, 2/3, 3/4) and optimized codeword lengths. This parameter change improves coding performance while managing complexity through standardized LDPC implementations.
Solution Approach 2:
The patent introduces dynamic selection of code rates and codeword lengths based on transmission conditions and PHR information characteristics. This allows the system to adaptively optimize coding performance while controlling complexity by selecting appropriate coding configurations for different scenarios.
2Duration of action of moving object
If the PHR field uses existing coding schemes, then the transmission duration is extended, but the demodulation bottleneck is worsened
Solution Approach 1:
The patent optimizes transmission duration by changing coding parameters including selecting appropriate code rates and codeword lengths. The LDPC coding scheme with optimized parameters reduces transmission duration while improving demodulation efficiency through better error correction capabilities.
3Object-affected harmful factors
If the PHR field transmission time is reduced, then the interference with other wireless devices is minimized, but the coding performance may be compromised
Solution Approach 1:
The patent uses LDPC coding with optimized code rates and codeword lengths to achieve reliable transmission in reduced time. The improved error correction capability of LDPC allows shorter transmission durations while maintaining or improving coding performance, thereby reducing interference with other wireless devices.
Data Source
AI summary
This application relates to an ultra-wideband-based signal transmission method and apparatus. The method includes: sending a signal, where the signal includes a signal generated based on a codeword obtained by encoding first PHR information, the codeword includes a codeword, in a first codeword set, that corresponds to the first PHR information, and the first PHR information indicates a data rate of a physical layer payload field. In this application, coding performance of the first PHR information can be improved. This application is applied to a UWB-based WPAN system, a sensing system, and the like, including an 802.15 series protocol, for example, the 802.15.4a protocol, the 802.15.4z protocol, or the 802.15.4ab protocol; and is also applicable to WLAN systems of 802.11 series protocols such as a next-generation Wi-Fi protocol of 802.11ax, for example, 802.11be, Wi-Fi 7, or EHT, and a next-generation protocol of 802.11be like Wi-Fi 8.