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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Direct Sequence UWB Impulse Radio System ] Date Submitted: [ September 13th, 2004 ] Source: [(1)Akira Maeki, Masaru Kokubo, Masayuki Miyazaki, Kenichi Mizugaki, Ryosuke Fujiwara,

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Direct Sequence UWB Impulse Radio System ] Date Submitted: [September 13th, 2004] Source: [(1)Akira Maeki, Masaru Kokubo, Masayuki Miyazaki, Kenichi Mizugaki, Ryosuke Fujiwara, (2)Yasuyuki Okuma, Miki Hayakawa, Shinsuke Kobayashi, Noboru Koshizuka, Ken Sakamura] Company [(1) Hitachi, Ltd., Central Research Laboratory and Advanced Research Laboratory, (2) YRP Ubiquitous Networking Laboratory] Address [(1) 1-280 Higashi Koigakubo Kokubunji-shi, Tokyo 185-8601 JAPAN (2)28th KOWA Bldg., 2-20-1, Nishi-Gotanda Shinagawa-ku, Tokyo 141-0031 JAPAN] Voice:[+81 42.323.1111], FAX: [+81 42.327.7849], E-Mail:[a-maeki@crl.hitachi.co.jp] Re: [Response to Call for Proposals] Abstract: [This document proposes Hitachi, Ltd.’s PHY proposal for the IEEE 802.15.4 alternate PHY standard] Purpose: [Preliminary Proposal for the IEEE802.15.4a standard.] 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. Akira Maeki, Hitachi, Ltd.

  2. Hitachi, Ltd.PreliminaryProposal for IEEE 802.15.4a Alternate PHY Akira Maeki Hitachi, Ltd. DS- UWB Impulse Radio Akira Maeki, Hitachi, Ltd.

  3. Contents • DS-UWB IR Proposal • Location Awareness • Summary Akira Maeki, Hitachi, Ltd.

  4. Pulse Generator PA Direct Sequence UWB Impulse Radio System (DS-UWB IR) Impulse Radio DBPSK Transmitter t PRF=Tens of MHz PRF :Pulse Repetition Frequency Receiver RF BB Akira Maeki, Hitachi, Ltd.

  5. UWB Pulse and Spectrum Initial Target : Arbitrary Pulse in Low Band (3.1-5.1GHz) -40 -50 -60 • Example: • 2.5ns Gaussian Pulse • Center Frequency=4.1GHz • 3dB BW=660MHz • TxPower (ave.)= - 9.8dBm EIRP (dBm/MHz) -70 Low Band (3.1-5.1GHz) High Band (6-10GHz) -80 -90 0 1 2 3 4 5 6 7 8 9 10 11 Frequency (GHz) Akira Maeki, Hitachi, Ltd.

  6. Why DS-UWB IR? • Low Power Consumption : • -Very Simple Architecture • -Low Rate Sampling ADC: Tens of Msps, 2-4bits • Low Cost • -CMOS Implementation is Feasible (Peak Power <10dBm) • -Low Band (3.1-5.1GHz) • HighLocation Accuracy : ~30cm in 30m range (AWGN) • Best Fit to 4a Applications (Sensor Network etc.) Low Cost, Low Power, High Location Accuracy! Akira Maeki, Hitachi, Ltd.

  7. Scalability with spread factor PRF=32MHz Akira Maeki, Hitachi, Ltd.

  8. Link Budget Akira Maeki, Hitachi, Ltd.

  9. Implementation Feasibility Example: Transmitter PA Data Spreading Pulse Generator Digital PHY ANT. Switch Analog RF MAC BPF I ADC LPF Digital Block LNA Data • Matched Filter • Signal Acquisition • Tracking • etc. 0/90 PLL 4.1GHz Receiver ADC LPF <150kgate Q • Ranging Akira Maeki, Hitachi, Ltd.

  10. TDOA (t2-T2) TDOA (t3-T3) T3 t2 T2 t3 TDOA (t1-T1) “Calculation of the Node Location based on the TDOAs and the Reference Locations” T1 Time of Arrival: t1 Location Awareness • Trilaterationfor Location Awareness • - 3 Known-location Nodes • - TDOA (Time Difference Of Arrival) • High Location Accuracy : ~30cm in 30m range (AWGN) Wireless/Wired Network Monitor Terminal Reference Node 2 Server & Data Base Reference Node 3 For Sync. Node System Configuration for 2D location measurements (Synchronization by a node) Reference Node 1 Akira Maeki, Hitachi, Ltd.

  11. Summary DS-UWB IR is very Simple and Best Fit! -Low Power -Low Cost :CMOS implementation -High Location Accuracy :~30cm in 30m range at AWGN channel Proposed DS-UWB IR -fc=4.1GHz, BW=660MHz at Low Band (3.1-5.1GHz) -2.5ns Gaussian Pulse with PRF of 32MHz -DBPSK Modulation Akira Maeki, Hitachi, Ltd.

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