1 / 11

Adaptive Preamble Length Mode for UWB HRP Ranging

This document proposes an adaptive preamble length mode for ultra-wideband high-rate pulse ranging, optimizing performance and power consumption. Experimental results and a proposed frame format are presented.

hadkins
Download Presentation

Adaptive Preamble Length Mode for UWB HRP Ranging

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title:Adaptive Preamble Length Mode for UWB HRP Ranging Date Submitted: September 2018 • Source:Yi Yang, Jong-HoonJang, Moon-Seok Kang, Jonghyo Lee, Aditya V. Padaki, Boon Loong Ng Company: Samsung Email: yi83.yang@samsung.com, jh0.jang@samsung.com, moonseok.kang@samsung.com, jonghyo.lee@samsung.com, a.padaki@samsung.com, b.ng@samsung.com Abstract:[] Purpose: [] Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Slide 1 Slide 1

  2. Overview • Introduction • Experimental Results to Motivate use of Adaptive Preamble Length • Proposed Frame Format in PHR • Proposed PIB for Adaptive Preamble Length • Conclusions • Note: Notation/nomenclature based on • https://mentor.ieee.org/802.15/dcn/18/15-18-0286-01-004z-hrp-uwb-srdev-ppdu-text-contribution.docx • and • https://mentor.ieee.org/802.15/dcn/18/15-18-0335-00-004z-srdev-ppdu-for-enhanced-impulse-radio.pptx

  3. Current Preamble Length • SYNC part of SHR is static value set by higher layers • Receiver calculates the first path of Channel Impulse Response(CIR) from Preamble to get the ranging info • Higher layer oblivious to the required Number of symbols (Nsym) in SHR as because environment is always changing • Following issues are observed: • Long preambles may be used even in good LOS scenarios • Wastes power and makes channel busy • Short preambles may be used even in bad NLOS scenarios • Lose the performance ex: ranging accuracy

  4. Experimental Test 1: NLOS True Distance: 3.5m • Nsym=64, results in distance error for NLOS • Nsym=4096, gives much better accuracy Nsym=4096 Nsym=64

  5. Experimental Test 2: LOS • Nsym 128 and Nsym 1024 achieve almost the same accuracy

  6. Current Developments 802.15.4a 802.15.4z HRP

  7. Proposal • To achieve the best trade off between ranging accuracy and power consumed, dynamically change the preamble duration based on (not exhaustive list) • Setting ranging confidence level(CI) • the S/N of 1st path • Data rate

  8. Proposed Workflow

  9. Proposed PHR frame structure OR 0 Static 1 Dynamic 0~511 byte 0 Static 1 Dynamic 0~1023 byte For the 128 MHz PRF mode, the proposed change in PHR is

  10. Proposed PIB for Adaptive Preamble Mode Low Medium High

  11. Conclusions • Static SYNC length in the preamble may result in low ranging accuracy or high power consumption • This can be optimized by enabling adaptive preamble mode • Frame structure and PIB for adaptive preamble mode is proposed for performance optimized mode

More Related