Golay Sequence STF Generation for IEEE 802.11ay PPDU Flexibility
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Solution Overview
Problem
The flexibility of generating Physical Layer Protocol Data Units (PPDUs) in IEEE802.11ay wireless local area networks is limited due to simple methods for generating Short Training Fields (STFs), resulting in low peak-to-average power ratio (PAPR) and reduced power utilization.
Innovation Solution
The use of Golay sequences with strategically inserted zero elements in the STF to create multiple orthogonal sequences, allowing for a variety of STF configurations that maintain low PAPR, enabling higher power utilization and flexibility in PPDU generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a simple method is used to generate the STF in IEEE802.11ay, then the PAPR of the STF is kept low, but the flexibility of generating the PPDU is reduced
Solution Approach 1:
The STF is segmented into multiple sequences, each derived from a base Golay sequence through specific transformations (reversal, conjugation, sign changes). This segmentation allows the system to select different sequence combinations for different PPDU generation scenarios, thereby improving flexibility while maintaining a structured, manageable complexity through the use of a finite set of transformation rules.
2Use of energy by moving object
If the STF is designed with low PAPR to improve power utilization, then power efficiency increases, but the ability to support multiple receive ends with different PAPR requirements is limited
Solution Approach 1:
The patent applies local quality by allowing different segments of the STF (different sequences assigned to different receive ends) to have different properties tailored to specific receive ends' requirements. Each receive end can be allocated sequences with optimal PAPR characteristics for its specific channel conditions, while the overall STF structure maintains low PAPR through the Golay sequence foundation. This enables simultaneous optimization for multiple receive ends with different requirements.
Data Source
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AI summary
This application discloses a data transmission method, apparatus, and system, and belongs to the field of communications technologies. The data transmission method improves flexibility of generating a PPDU by a transmit end. The method includes: The transmit end sends a PPDU to at least one receive end after generating the PPDU. A target field in an STF in the PPDU includes a plurality of basic elements sequentially arranged, a zero elements located between every two adjacent basic elements, and a zero elements located before or after the plurality of basic elements, where a ≥ 1. A plurality of consecutive elements in the plurality of basic elements form a Golay sequence. The target field is transmitted on a subcarrier other than a guard subcarrier and a direct current subcarrier in a spectrum resource for transmitting the STF. This application is used for data transmission.