Submission Title: [Proposal to 15.4z for enhancing UWB PHYs]

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Presentation transcript:

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Proposal to 15.4z for enhancing UWB PHYs] Date Submitted: [July 6, 2018] Source: [Huan-Bang Li, Kenichi Takizawa, and Fumihide Kojima] Company [NICT, Japan] [Hisashi Nishikawa] Company[Global Interface Technologies Japan Inc.] Address [3-4 Hikarino-oka, Yokosuka, Kanagawa, Japan] [590 Nojiri, Rittoh-shi, Siga, Japan] Voice:[-], E-Mail:[lee (at) nict.go.jp] Re: [Proposed changes to IEEE802.15.4-2015 for enhancing UWB PHYs] Abstract: [Contribute a proposal to the enhanced impulse radio group 15.4z] Purpose: [Propose the modifications of the HRP as well as LRP UWB PHYs] 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.

Proposal to 15.4z for enhancing UWB PHYs

ToC Background/Motivation Modulation Proposal for HRP UWB PHY Band plan proposal for LRP UWB PHY

07/12/10 Background IEEE Std 802.15.4™-2015 includes two IR-UWB based PHY specifications with supporting MAC features. HRP UWB PHY (IEEE Std 802.15.4a – 2007) LRP UWB PHY (IEEE Std 802.15.4f – 2012) Both were developed for low-rate WPAN with consideration/emphasis on ranging capbility. Operating frequency bands HRP UWB PHY: low band and high band LPR UWB PHY: high band only

07/12/10 Motivations IR-UWB Ranging has different requirement/emphasis on PHY compared to communication. Enhancing ranging capbility by modifying or expanding existing features of IR-UWB PHY in IEEE Std 802.15.4™-2015 . Proposals are presented respectively for HRP UWB as well as for LRP UWB. Harmonization with other proposals.

Modulation Features of HRP UWB 07/12/10 Modulation Features of HRP UWB BPM+BPSK 00 0 - 01 10 1 - 11 Non-coherent coherent T/2 Guard interval T/2 シンボル間ガード区間 S 1 31 32 33 63 15 16 47 48 -S 1 31 32 33 63 15 16 47 48 S 1 31 32 33 63 15 16 47 48 -S Scramble interval 1 31 32 33 63 15 16 47 48 Coherent (BPM+BPSK) for better performance. Non-coherent (BPM) for simple structure.

HRP UWB Improvement Proposal 07/12/10 HRP UWB Improvement Proposal 1 31 32 15 16 63 S -S Guard interval 1T 2T OOK BPSK OOK for simple structure. BPSK for better performance

HRP UWB Improvement Proposal (Cnt’d) 07/12/10 HRP UWB Improvement Proposal (Cnt’d) Figure 16-3—HRP UWB PHY symbol structure Add OOK – BPSK mode to Figure. 16-3 OOK or BPSK pulses

HRP UWB Improvement Proposal (Cnt’d) 07/12/10 HRP UWB Improvement Proposal (Cnt’d) Add a new ranging mode by replacing BPM+BPSK with an OOK and a BPSK, where OOK and BPSK are two seperated modulation options. Choose OOK for simlicity (reduce cost and power consumption) Choose BPSK for better performance Cut the symbol duration by half to reduce the ToF Shortening TOA ranging time to save power Increase system capacity

Large Bandwidth Features of LRP UWB 07/12/10 Large Bandwidth Features of LRP UWB LRP UWB only uses high band with large bandwidth. Favorable for compansating distance loss compared to low band Ranging-favorited because of inherent high precision of time resolution Adopted high bands are not comprehensive Only focus on 6 – 9 GHz Beyond 9 GHz is not included

LRP UWB Improvement Proposal 07/12/10 LRP UWB Improvement Proposal Add channel number 3 to Table 10-9 to effectively use beyond 9GHz 19.7.3 LPR UWB PHY PSD mask IEEE802.15.4-2015 3 8486.4

LRP UWB Improvement Proposal (Cnt’d) 07/12/10 LRP UWB Improvement Proposal (Cnt’d) Add PSD mask for channel number 3 to Table 19-9 19.7.3 LPR UWB PHY PSD mask IEEE802.15.4-2015 3 8486.4 <7587.84 -18 7587.84 to 7662.72 -10 7662.72 to 9809.28 9809.28 to 9884.16 > 9884.16

LRP UWB Improvement Proposal (Cnt’d) Add PSD mask illustration for channel number 3 to Figure 19-7 PSD mask satisfies Japan and Korea

Harmonization With HRP Band Plan 07/12/10 LRP UWB Improvement Proposal (Cnt’d) Harmonization With HRP Band Plan LRP Band number HRP Band plan Ch.7 1 Ch. 5, 6, 8, 9 2 Ch.11 3 Ch. 9, 10, 12, 13

07/12/10 Reference Slides

HRP Band Plan

Calculation of PSD Mask 16.4.6 Transmit PSD mask