Tone Mapper Reordering for High-Frequency WLAN Reliability
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Solution Overview
Problem
The redesign of a tone mapper is necessary for high frequency band communication scenarios due to differences in interference and noise compared to low frequency bands, as existing tone mappers for low frequency bands are not applicable.
Innovation Solution
A communication method involving a tone mapper that reorders high-frequency constellation mapping symbols and a tone inverse-mapper for sequence restoration, along with a tone plan that increases the quantity of pilot tones in high frequency band communication to reduce packet error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a low frequency band tone mapper is used for high frequency band communication, then device complexity is reduced, but communication reliability deteriorates due to different interference and noise characteristics
Solution Approach 1:
The patent changes the tone mapping distance parameter from the low frequency band configuration to a optimized value for high frequency band. Specifically, it adjusts the tone mapping distance parameter in the tone mapper to match the interference and noise characteristics of high frequency band, thereby maintaining communication reliability without requiring complete redesign of the tone mapper structure
Solution Approach 2:
The patent introduces dynamic adjustment of tone mapping parameters based on channel conditions. The tone mapping distance parameter is made adjustable according to the specific high frequency band channel environment, allowing the system to adapt to varying interference and noise levels while maintaining reliable communication
2Measurement precision
If the quantity of pilot tones is increased in high frequency band communication, then measurement precision improves for channel estimation, but device complexity increases
Solution Approach 1:
The patent applies partial action by increasing the quantity of pilot tones only in specific high frequency band subcarriers where channel estimation is most critical. Rather than uniformly increasing pilot tones across all subcarriers, the patent strategically places additional pilot tones in regions with higher interference or faster fading, achieving improved measurement precision where needed while limiting the overall increase in device complexity
Data Source
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AI summary
Embodiments of this application provide a communication method. The method is applied to a wireless local area network system supporting 802.11 series protocols, for example, a next-generation Wi-Fi protocol of IEEE 802.11ax, like 802.11be, Wi-Fi 7, or EHT, or for another example, a next-generation of 802.11be, like Wi-Fi 8, UHR, or Wi-Fi AI, and may be further applied to an ultra-wideband UWB-based wireless personal area network system or a sensing (sensing) system. The method includes: inputting high-frequency constellation mapping symbols into a tone mapper; and recording, by the tone mapper, the high-frequency constellation mapping symbols. For communication transmission in a high frequency band scenario, a proper tone mapper may be designed, and constellation mapping symbols are reordered based on the tone mapper.