doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 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. <author>, <company>

Hitachi, Ltd. Preliminary Proposal for IEEE 802.15.4a Alternate PHY <month year> doc.: IEEE 802.15-<doc#> September 2004 Hitachi, Ltd. Preliminary Proposal for IEEE 802.15.4a Alternate PHY DS- UWB Impulse Radio Akira Maeki Hitachi, Ltd. Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 Contents DS-UWB IR Proposal Location Awareness Summary Akira Maeki, Hitachi, Ltd. <author>, <company>

Direct Sequence UWB Impulse Radio System (DS-UWB IR) <month year> doc.: IEEE 802.15-<doc#> September 2004 Direct Sequence UWB Impulse Radio System (DS-UWB IR) Pulse Generator PA Impulse Radio DBPSK Transmitter t PRF=Tens of MHz PRF :Pulse Repetition Frequency Receiver RF BB Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 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 1 2 3 4 5 6 7 8 9 10 11 Frequency (GHz) Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 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) High Location 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. <author>, <company>

Scalability with spread factor <month year> doc.: IEEE 802.15-<doc#> September 2004 Scalability with spread factor Data Rate Modulation Spread Factor Number of Pulses / Bit 32.0 Mbps DBPSK 1 10.7 Mbps 3 4.57 Mbps 7 2.13 Mbps 15 1.03 Mbps 31 258 kbps 124 129 kbps 248 PRF=32MHz Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 Link Budget Parameters Value 0.129Mbps 30m 1.03Mbps 10m Units Center Frequency 4096 MHz Transmit Power (2.5ns Gaussian Pulse) -9.8 dBm PRF 32 Spread Factor 248 31 Data Rate 0.129 1.03 Mbps Path Loss at 1m 44.7 dB Distance 30 10 m Decay coefficient 2.0 　- Additional Path Loss at 30m,10m 29.5 20.0 Implementation Loss 3.0 Antenna gain -3.0 dBi Required Eb/N0 @PER=1%, 32B 14.0 9.8 Noise Power Density -174 Receiver Total NF 7.0 Margin 11.9 16.5 Akira Maeki, Hitachi, Ltd. <author>, <company>

Implementation Feasibility <month year> doc.: IEEE 802.15-<doc#> September 2004 Implementation Feasibility Example: Transmitter PA Pulse Generator Spreading Data ANT. Switch Analog RF Digital PHY BPF MAC I LPF ADC Digital Block LNA Data 0/90 PLL Matched Filter Signal Acquisition Tracking etc. 4.1GHz Receiver LPF ADC <150kgate Q Ranging Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 Location Awareness Trilateration for Location Awareness - 3 Known-location Nodes - TDOA (Time Difference Of Arrival) High Location Accuracy : ~30cm in 30m range (AWGN) Wireless/Wired Network Monitor Terminal TDOA (t1-T1) (t2-T2) (t3-T3) Reference Node 2 Server & Data Base Time of Arrival: t1 t2 t3 T2 T1 T3 Reference Node 3 “Calculation of the Node Location based on the TDOAs and the Reference Locations” For Sync. Node System Configuration for 2D location measurements (Synchronization by a node) Reference Node 1 Akira Maeki, Hitachi, Ltd. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> September 2004 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. <author>, <company>