UWB PPDU Frequency Stitching With Inactive Switching Gaps
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Solution Overview
Problem
Current frequency band stitching solutions for UWB devices with low costs and low power consumption are inadequate in meeting frequency switching requirements, limiting their sensing performance due to the inability to process high-bandwidth signals effectively.
Innovation Solution
Introduce an inactive segment between frequency bands in the PPDU transmission method to allow for sufficient time gaps for frequency switching, enabling frequency band adjustment or switching, and incorporate a control message to manage frequency band stitching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple frequency bands are stitched together to form a wider bandwidth frequency band, then sensing performance is improved, but frequency switching requirements cannot be met due to insufficient time gaps
Solution Approach 1:
The frequency band stitching process is segmented by introducing inactive segments between active frequency bands. This segmentation allows the system to switch between different frequency bands by creating distinct temporal boundaries, ensuring that frequency switching requirements are met while maintaining multiple stitched frequency bands for improved sensing performance.
Solution Approach 2:
Inactive segments are introduced in advance between active frequency bands to prepare for frequency switching. These preliminary time gaps ensure that the communication apparatus has sufficient time to complete frequency switching before the next active frequency band begins, thereby meeting frequency switching requirements while maintaining the stitched frequency band structure.
2Measurement precision
If frequency band stitching is implemented to improve sensing performance, then effective bandwidth increases, but current solutions are inadequate for low cost and low power consumption devices
Solution Approach 1:
The frequency band stitching for low cost and low power consumption devices uses periodic action by alternating between active frequency bands and inactive segments. This periodic structure allows the device to process high-bandwidth signals through multiple stitched frequency bands while managing complexity through regular, predictable switching patterns that can be efficiently implemented in resource-constrained devices.
3Reliability
If an inactive segment is introduced between frequency bands to allow frequency switching, then frequency switching requirement is met, but transmission time increases
Solution Approach 1:
The inactive segments introduce a partial time loss for frequency switching, but this is necessary to meet frequency switching requirements. The switching time is kept minimal (just sufficient for the transition) rather than excessive, balancing the need for reliable frequency switching with the desire to minimize transmission time loss in the frequency band stitching process.
Data Source
AI summary
A packet data protocol unit (PDPU) transmission method includes: a communication apparatus generates and sends a PPDU, where the PPDU includes a first segment and a second segment. Transmission frequency bands of the two segments are different, and an inactive segment exists between the two segments. The communication apparatus does not transmit an ultra-wideband (UWB) pulse within a duration of the inactive segment.