May 5 2003 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Channel ized, Optimum Pulse Shaped UWB PHY Proposal] Date Submitted: [May 2003] Source: [Jonathon Cheah] Company [Femto Devices Inc.] Address [5897 Oberlin Drive #208, San Diego CA 92121] Voice:[858-404-0457], FAX: [858-404-0457], E-Mail:[jcheah@femtodevices.com] Re: [.] [Response to call for Proposal] Abstract: [This proposal addresses a complete implement able UWB PHY architecture within the FCC UWB rule, and taking into account of the potential feasibility in Silicon fabrication. The proposed PHY shall satisfy the basic 100 Mbps requirement, and the optional requirement of 480 Mbps..] Purpose: [This proposal is submitted for consideration of IEEE802.15.3a PHY 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. Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Contents Re statement of design goals Revisit: PHY Specification summary Revisit: Channel Plan Revisit: NII interference co-existence Piconet co-existence Length 11 Time Frequency code Wake-up unique word Receiver chain Mode of operation Channel response Link budgets May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Goal The goal of this design is cost, cost, cost, low DC power consumption, then performance. The goal is to seek the simplest, and minimum configuration solution to meet the requirements. This presentation is an extension of the March submission to provide further detail results with respect to channel performance. May 2003 Jonathon Cheah, femto Devices Inc.

Revisit : PHY Specifications Summary 8 basic channel at 800 Mhz bandwidth Length 11 Time Frequency code Time multiplexed Receiver chain Gaussian wave-shaped pulses OOK modulation for Wake-up sequence BPSK modulation data transmission. 2 finger Rake receiver followed by Equalizer FEC Convolution rate ½ code constraint length 7 May 2003 Jonathon Cheah, femto Devices Inc.

Revisit-- Channel Plan Define 8 x 800 Mhz (-4.3 dB BW) channels to cover 3.1 to 10.6 Ghz FCC defined 10dB BW is 1.2 Ghz per channel. Channels are: 4.000, 4.800, 5.600, 6.400, 7.200, 8.000, 8.800, 9.600 Ghz. (~1 Ghz from band edge.) May 2003 Jonathon Cheah, femto Devices Inc.

Basic 8 by 800 Mhz Channel Plan with indoor & Handheld limits May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. 802.11A coexistence Lower NII band can be avoided by missing channel 2 Upper NII band can be avoided by missing channel 3 Time-frequency codes can be used to avoid these channels if needed. May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Piconets Independent Piconet is separated by Time frequency code set. It is possible to extract maximum distance Time-frequency code set for Piconet operation. 10 codes available May 2003 Jonathon Cheah, femto Devices Inc.

Time-frequency code length The number of independent receiver chain is = Time frequency code length. The longer the code length, the lower is the PRF, and the lesser the effect of delay spread. Code length = 4, at 500Mbps can pass basic CM1 to CM4 requirements, ie: The delay spread can be handled by the Rake/Equalizer pair at this rate. However Code length =11 is used for FCC average power and Piconet requirements Therefore, receiver chains can be time-multiplexed. May 2003 Jonathon Cheah, femto Devices Inc.

Simple Length 11 Orthonormal Time- Frequency code set Orthonormality defined as: # 1 2 3 4 5 6 7 8 May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Wake-up /beacon As the basic receiver structure is complicated, it consumes biggest portion of total DC power. it is desirable to have it off at all time. Borrow Satellite low detection error Unique Word technique and energy detection to wake-up and provide bit timing. Propose Maury-Styles length-30 Unique Word 111110101111001100110100000000 The Unique Word is transmitted in OOK to permit energy detection. May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Receiver Chain 4 receiver chains are needed. Pulse repetitive per channel of 8 can be time-multiplexed by 2. Each receiver chain processes signal according to Time-Frequency code set. Each receiver chain consists of a 2-finger Rake and a Equalizer Simplified Matlab simulation files will be provided on request to show that pulse repetitive rate of 4 per channel is sufficient to cope with CM1 to CM4 response. May 2003 Jonathon Cheah, femto Devices Inc.

Receiver block diagram May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Each receiver chain May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Mode Of Operation The receiver is normally off, with only “energy detection xtal set” on. On receipt of UW sequence, receiver is turned on with bit-timing sync. BPSK demod is on with non-coherent differential detection, therefore carrier recovery is not necessary. T-F coder coordinates the reception. MAC layer determines the default channel. May 2003 Jonathon Cheah, femto Devices Inc.

Channel Response Performance May 2003 Jonathon Cheah, femto Devices Inc.

Jonathon Cheah, femto Devices Inc. Link Budget Table Ch1 Ch8 Throughput 100 480 Over-the-air bit rate 275 1320 PRF rate 11 Average TX power (PT) dBm -3.5 -0.5 Tx Antenna gain (GT) dBi fc: center frequency of waveform Ghz 4.0 9.6 Path loss at 1 meter (L1) dB 44.5 52.1 Path loss at d meter (L2) dB 20 Rx antenna gain (GR) dBi Rx Power (PR = PT+GT+GR-L1-L2) dBm -68 -72.6 -64.6 -72.2 Noise bandwidth at antenna port (Mhz) 800 Noise Power (N = -174 + 10*log(Rb)) dBm -89.6 -82.8 Rx Noise Figure (NF) dB 7 Rx Noise Power (PN = N+NF) dBm -82.6 -75.8 Processing Gain (PG) 1 Minimum C/N (S) dB 6 Link Margin (M = PR + PG –PN- S) 5.6 1.0 2.2 -5.4 Proposed Minimum Rx sensitivity level dBm -75 May 2003 Jonathon Cheah, femto Devices Inc.

Link Budget calculation example for May 2003 Jonathon Cheah, femto Devices Inc.