DRU Data Symbol Reconstruction From Truncated Wireless Samples
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Solution Overview
Problem
Existing wireless communication systems lack efficient methods for 2×- or 1×-Data symbol transmission arrangements in distributed resource unit (DRU) transmission, particularly in ultra-high reliability (UHR) systems like IEEE 802.11 series, where the long training field (LTF) is not aligned with DRU tone plans, leading to inefficiencies.
Innovation Solution
A method for wireless communication that involves receiving a packet with a truncated data symbol sample and determining a truncation ratio, appending additional truncated data symbol samples, and applying discrete Fourier transform (DFT) to obtain a whole data symbol, while using guard interval removal and arithmetic operations like repetition, mirror repetition, negation, or conjugation to recreate the complete signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the long training field (LTF) is occupied only to the subcarriers overlapped with the scheduled resource unit (RU) in DRU transmission, then the LTF occupancy is reduced, but there is no 2×- or 1×-Data symbol transmission arrangement implemented
Solution Approach 1:
The data symbol is segmented into multiple parts, and only a portion is transmitted while the rest is generated through repetition operations. This segmentation enables 2×- or 1×-data symbol transmission arrangements in DRU systems, improving transmission efficiency without requiring complete data symbol transmission for each RU
Solution Approach 2:
The patent applies copying by generating additional data symbol samples through repetition operations (2× repetition, 4× repetition) based on the transmitted portion. This copying mechanism enables the receiver to reconstruct the complete data symbol without transmitting the entire symbol, thereby improving productivity while managing complexity
2Loss of time
If the LTF symbol size is reduced for DRU transmission, then transmission time is reduced, but the data symbol must be reconstructed from truncated samples
Solution Approach 1:
The transmitter pre-determines the truncation ratio and transmits only the necessary portion of the data symbol. The receiver then uses preliminary information (truncation ratio indication) to reconstruct the complete symbol through repetition operations, reducing transmission time while managing reconstruction complexity through pre-planned operations
Solution Approach 2:
The receiver generates additional data symbol samples by copying and repeating the transmitted truncated samples (2× repetition, 4× repetition). This copying approach enables efficient time reduction while the reconstruction complexity is managed through systematic repetition patterns rather than complex processing
Data Source
AI summary
A communication method including receiving a packet including a truncated data symbol sample and an indication of a truncation ratio. The method further includes, based at least in part on the truncation ratio, determining a number of additional truncated data symbol samples for appending to the truncated data symbol sample. The method further includes appending the number of additional truncated data symbol samples to the truncated data symbol in order to obtain a whole data symbol sample.