High-Throughput Long Training Fields for VHT WLAN Channel Estimation
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Solution Overview
Problem
The existing IEEE 802.11n standard struggles to accurately determine the quantity of high-throughput long training fields and spreading code matrices when the number of space time streams or extra spatial dimensions exceeds 4, which is necessary for the development of next-generation Very High Throughput (VHT) WLAN standards.
Innovation Solution
A method and device that set the quantity of high-throughput long training fields to be greater than or equal to 8 when the number of space time streams is greater than 4, allowing for the determination of the spreading code matrix and enabling effective channel estimation in VHT WLAN systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of space time streams is increased beyond 4 to achieve higher throughput, then the data transmission capacity is improved, but the channel estimation accuracy deteriorates due to insufficient high-throughput long training fields
Solution Approach 1:
The patent changes the parameter of the quantity of high-throughput long training fields from the conventional maximum of 4 to 8 or more, enabling accurate channel estimation in VHT WLAN systems with more than 4 space time streams. This parameter change allows the system to maintain channel estimation accuracy while supporting increased data transmission capacity through additional spatial streams.
2Adaptability or versatility
If the quantity of high-throughput long training fields is limited to 4 or less, then the packet structure remains simple and compatible with existing standards, but the system cannot support VHT WLAN with more than 4 space time streams
Solution Approach 1:
The patent segments the high-throughput long training fields into multiple sets, each associated with different space time stream configurations. By organizing the training fields in a segmented manner and defining their quantities based on the number of space time streams, the system achieves adaptability to VHT WLAN while maintaining manageable packet structure complexity through standardized organization principles.
Data Source
AI summary
A method, for determining a first amount of a plurality of high-throughput long training fields within a packet in a wireless communication system, includes determining a second amount of a plurality of space time streams needed by the wireless communication system transmitting the packet, and setting the first amount to be greater than or equal to 8 when the second amount is greater than 4.