4X LTF Sequence for 80MHz WLAN Throughput
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face challenges in transmitting Long Training Field (LTF) signals effectively over an 80 MHz band, particularly in new communication standards like the proposed IEEE 802.11be standard, which requires optimized LTF sequences for improved throughput and reliability.
Innovation Solution
The introduction of a specifically defined 4×LTF sequence for the 80 MHz band, comprising two sequences, is proposed to enhance the transmission of LTF signals, ensuring compatibility with the new communication standards and improving signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional LTF sequence is used for 80 MHz band transmission, then the transmission can be maintained with existing standards, but the throughput and reliability are insufficient for new communication standards like IEEE 802.11be
Solution Approach 1:
The patent applies parameter changes by modifying the LTF sequence structure specifically for 80 MHz band transmission. The sequence is designed with specific mathematical properties (using roots of unity and specific indexing patterns) to optimize both throughput and reliability for the new IEEE 802.11be standard, rather than using conventional sequences designed for narrower bands.
2Productivity
If the LTF sequence is optimized for new IEEE 802.11be standard, then throughput and signal quality improve, but compatibility with existing standards may be reduced
Solution Approach 1:
The patent applies local quality by creating a specialized LTF sequence configuration specifically tailored for 80 MHz band transmission in IEEE 802.11be networks. The sequence uses specific mathematical constructions (roots of unity with particular indexing) that are optimized for this specific application context, allowing high throughput and reliability for new standards while acknowledging it is designed for this particular use case.
3Reliability
If a new 4×LTF sequence is defined for 80 MHz band, then signal quality and transmission reliability improve, but the complexity of sequence definition and implementation increases
Solution Approach 1:
The patent applies segmentation by dividing the 80 MHz band into multiple subcarriers and assigning specific LTF sequence values to each subcarrier index. The sequence is constructed in segments using roots of unity with specific indexing patterns (e.g., indices divisible by 4, or specific modulo operations), which breaks down the complex sequence definition into manageable mathematical segments that can be systematically generated and implemented.
Data Source
AI summary
The present disclosure is related to a Long Training Field (LTF) signal used in a wireless local area network (WLAN) system. The LTF signal may be generated by a transmitting station (STA) and received by a receiving STA. The LTF signal may be included in a physical protocol data unit (PPDU), and the PPDU may be transmitted an 80 MHz band. The LTF sequence may include at least two parts, i.e., a first LTF sequence and a second LTF sequence.