month year doc IEEE 802 15 03147 r

<month year> doc. : IEEE 802. 15 -<03147 r 2> Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Multicarrier-UWB] Date Submitted: [8 March 2003] Source: [Ahmed H Tewfik] Company [University of Minnesota] Address [Dept. of Electrical and Computer Engineering, Room 4 -174 EECS Bldg. , Minneapolis, MN 55455] Voice: [612 -625 -6024], FAX: [612 -625 -4583], E-Mail: [tewfik@ece. umn. edu] Re: [03147 r 0 P 802 -15_TG 3 a-University-of-Minnesota-CFP-Presentation. ppt] Response to a Call for Contributions Task Group 3 a Call For Intent and Proposals, November 2002, updated January 2003, 02371 r 0 P 802 -15_SG 3 a-5_Criteria. doc Abstract: [We propose a multi-carrier UWB system for WPAN communications. We describe system design issues and proposed transmitter and receiver structures. We also provide a self-evaluation of the proposed system. ] Purpose: [For consideration by 802. 15. 3 a task group. ] Notice: This document has been prepared to assist the IEEE P 802. 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 P 802. 15. Submission 1 <author>, <company>

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Fast Frequency Hopping UWB-OFDM A. H. Tewfik and E. Saberinia B. University of Minnesota Submission 2 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Overview • FFH-UWB-OFDM: compromise between multi -UWB and pure OFDM • Proposed System • System comparisons and design trade-offs • Transmitter and Receiver Structure • Link Budget • Performance of the System • Coexistence and Multiple piconets • Complexity and Power Consumption • D/A and A/D structure • Conclusion Submission 3 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Multi-Carrier UWB • Multi-band UWB – Need multiple band transmitter – Need a block of analog matched filters • Pure OFDM UWB – No need for Rake receiver – Need heavy coding to extract frequency diversity – Long FFT and IFFT • FFH-UWB-OFDM (some where between!) – No need for Rake receiver – Implemented short IFFT and FFT technology – Extract multipath diversity and use smaller number of Subcarriers Submission 4 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> An FFH-UWB-OFDM Block • Make an OFDM block with N-IFFT of QAM symbols (N=32) f(MHz) W 30 • Create a base band signal with bandwidth W> 500 MHz and Duration Tu ns Submission 31 1 0 0 0 5 Tu Tewfik/Saberinia, U. of MN t

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> An FFH-UWB-OFDM Block • Fast frequency hopping inside the block to achieve multipath resolution and frequency spreading • Avoid UNII band – Use only 3. 1 -4. 8 GHz (Lower Band System) – Use whole band avoid 4. 8 -5. 9 GHz (Whole Band System) Submission 6 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Frequency Hopping for Lower Band System f(GHz) 4. 75 31 30 1 0 4. 2 31 30 1 0 3. 65 31 30 1 0 3. 1 0 Submission 1. 81 3. 6364 7 5. 4545 t(ns) Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Frequency Hopping for Whole Band System 31 30 f(GHz) 31 30 9. 7 31 30 10 10 5. 9 4. 75 31 30 3. 1 10 10 10 0 Submission 10 10 31 30 10 5. 45 t(ns) 8 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> An FFH-UWB-OFDM Block • Repeat this block every T=12. 8 ns N=32 times f(GHz) 4. 75 4. 2 3. 65 3. 1 23 22 1 0 1 0 23 22 1 0 0 Submission 5. 45 12. 8 t(ns) 9 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Spectrum • Bandwidth=1. 65 GHz • Multipath resolution=0. 6 ns Submission • Bandwidth=7. 5 GHz • Multipath resolution=0. 13 ns 10 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Proposed System • N=32 Subcarrier • ¾ Convolutional Channel Coding • QAM Constellation: QPSK: 110 Mbit/s 16 -QAM: 220 Mbit/s 64 -QAM: 480 Mbit/s Submission 11 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Transmitter ¾ Convlution Code Interleaving I FF T QAM Mapping Input rate= 78. 22 M sample/s PAM signal X Frequency Hopping Sample and Hold for Ts= 5. 45 ns Submission 12 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Receiver SYNC S -D 1 bit A/D LPF X VCO S p/2 X LPF X S AGC S -D 1 bit A/D exp(j. . ) pilot X P*(n) |. |2 Info. Bearing carrier X P*(n) X Decision Bit mapping S S Decision exp(j. . ) Submission 13 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Link Budget Lower Band System Whole Band System Submission 14 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> BER vs SNR for CM 3 Submission 15 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> BER vs SNR for CM 4 Submission 16 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Bit rate versus Distance Submission 17 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Bit rate versus Distance Submission 18 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Bit rate versus Distance Submission 19 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Coexistence Submission 20 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Multiple Piconets • Simultaneous operation achieved by proper selection of: – Different FH code (for whole band system) – Use of piconet dependent pilots – Combination of above Submission 21 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Pilot Assisted Demodulation Pilot MF Energy Detector r(t) Correlator MF Decision Energy Detector Information bearing carrier pilots MF Information bearing carriers Submission 22 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Transmitter Complexity and Power Consumption Submission 23 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Receiver Complexity and Power Consumption Submission 24 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Traditional Sigma Delta X(n) + 1 bit quantizer + - Submission 25 y(n) Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Traditional Sigma Delta A/D X(t) + oversample 1 bit quantizer + - Lowpass Filtering and downsampling Multibit X(n) Analog switched capacitor implementation Submission 26 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Traditional Sigma Delta D/A X(n) + L upsample 1 bit quantizer + 1 bit D/A Analog Lowpass Filtering - X(t) • Higher order SD preferred: – Better noise shaping – Eliminate spurious tones Submission 27 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> N Tone Sigma Delta X(n) (e. g. , output of N point IFFT) Submission + 1 bit quantizer + - 28 y(n) Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> N Tone Sigma Delta “Instantaneous” Frequency spectrum Filter outputs Submission 29 Tewfik/Saberinia, U. of MN

May 5, 2003 doc. : IEEE 802. 15 -<03147 r 2> Conclusion • FFH-UWB-OFDM provides a compromise between pure OFDM and Multi-band UWB • It avoids Rake type receiver with reasonable size FFT-IFFT • Low complexity transmitter and receiver structures possible Submission 31 Tewfik/Saberinia, U. of MN