Pilot Sequence Configuration for 802.11ay Channel Bonding
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Solution Overview
Problem
Current wireless local area network (WLAN) systems, particularly in the IEEE 802.11ay standard, face limitations in efficiently transmitting and receiving signals through multiple space-time streams and bonded channels, leading to restricted channel bonding usage due to contention-based access methods and limited flexibility in medium access.
Innovation Solution
A method for configuring a pilot sequence for two bonded channels in the IEEE 802.11ay system, allowing for low peak-to-average power ratio (PAPR) and enabling flexible channel bonding by scheduling-based access and spatial sharing techniques, which supports up to 8 space-time streams and two bonded channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bonding is implemented in WLAN systems, then bandwidth and throughput are improved, but peak-to-average power ratio increases and system complexity increases
Solution Approach 1:
The patent segments the channel bonding configuration into multiple space-time streams, where each stream can be independently configured with appropriate pilot sequences. This allows the system to handle channel bonding in a modular fashion, reducing overall complexity while maintaining high throughput capability.
Solution Approach 2:
The patent changes key parameters including pilot sequence length, pilot density, and space-time stream configuration to optimize performance. By adjusting these parameters based on channel conditions and bonding configuration, the system achieves low PAPR while maintaining high throughput in bonded channels.
2Productivity
If multiple space-time streams are used, then data rate is improved, but pilot sequence configuration complexity and PAPR increase
Solution Approach 1:
The patent divides the pilot sequence configuration into per-space-time-stream basis, allowing independent optimization of pilot sequences for each stream. This segmentation simplifies the overall configuration process while supporting multiple streams for high data rates.
Solution Approach 2:
The patent applies different pilot sequence configurations locally to each space-time stream based on its specific channel characteristics and requirements. This localized approach optimizes performance for each stream while keeping the overall system manageable.
3Measurement precision
If pilot sequence length is increased, then channel estimation accuracy is improved, but PAPR and transmission overhead increase
Solution Approach 1:
The patent optimizes pilot sequence length as a configurable parameter based on channel conditions, bonding configuration, and stream count. By dynamically adjusting this parameter, the system achieves sufficient channel estimation accuracy while controlling PAPR and overhead.
Solution Approach 2:
The patent uses partial pilot sequences rather than full-length sequences in certain configurations, providing sufficient channel estimation accuracy for the specific bonding and stream configuration while reducing PAPR and overhead compared to using complete pilot sequences.
Data Source
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AI summary
The present specification suggests a method for transmitting and receiving a signal, by a station, in a wireless LAN (WLAN) system supporting a maximum of eight space time streams, and an apparatus therefor. More specifically, the present specification suggests a method for transmitting and receiving a signal including a pilot sequence for 2 channel bonding per each space time stream when a station transmits and receives a signal through a channel in which two channels are bonded, and an apparatus therefor.