1. September 2004
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [MultiBand OFDM Update and Overview]
Date Submitted: [ 12 September, 2004]
Source: [Matthew B. Shoemake] Company [WiQuest Communications, Inc.]
Address [8 Prestige Circle, Suite 110, Allen, Texas, USA 75002]
Voice:[ ], FAX: [ ],
Re: [MultiBand OFDM Proposal, doc r4]
Abstract: [This presentation provides an overview of the MultiBand OFDM proposal. Details of the actual proposal may be found in document r4. This presentation provides high level technical details of the MultiBand OFDM proposal. It attempts to communicate what MultiBand OFDM is, why key technical decision were made, how the solution functions and who key supporters of the proposal are.]
Purpose: [To inform voters of the merits of MultiBand OFDM thereby allowing them to make an informed vote in the IEEE a technical selection procedure.]
Notice: This document has been prepared to assist the IEEE P 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
Matthew B. Shoemake, WiQuest

2. September 2004
Introduction
The purpose of this document is to provide an overview of MultiBand OFDM (doc ) including
Technical advantages and characteristics
Identification of key supporters
References to supporting material
Matthew B. Shoemake, WiQuest

3. Proposal Overview The MultiBand OFDM proposal:
September 2004
Proposal Overview
The MultiBand OFDM proposal:
Is based on proven OFDM technology
Used in IEEE a and g
Achieves data rates of 53 to 480 Mbps
Support for 4 to 16 simultaneous piconets
Spectrum easily sculpted for international regulatory domain compliance
Is easily extensible for future range/rate improvements
Matthew B. Shoemake, WiQuest

4. Frame Format PLCP Preamble PLCP Header Payload
September 2004
Frame Format
PHY
Tail
MAC
Tail
Pad
Frame Payload
Tail
Pad
PLCP Preamble
HCS
FCS
Header
Bits
Header
Bits
Bits
Variable Length: 0 -
4095 bytes
Bits
Bits
PLCP Header
53.3*, 80, 110*, 160, 200*, 320,
400, 480 Mb/s
53.3 Mb/s
* - Mandatory Rates
PLCP Preamble
Deterministic sequence
Allows packet detect and piconet identification
PLCP Header
Encoded at 53 Mbps
Contains reserved bits for future extensions
Payload
Coded at 53 to 480 Mbps
Each frame contains multiple OFDM symbols
Matthew B. Shoemake, WiQuest

5. Frequency-Domain Inputs
September 2004
Encoder
Scrambler
64-State
BCC
Puncturer
3-Stage
Interleaver
QPSK
Mapper
IFFT
DAC
Time
Frequency
Kernel
NULL # - 61 -2 1 2
127
126 62 63 64 67 65 66
Frequency-Domain Inputs
Time-Domain Outputs D
Output Data A
Output Data B
Output Data C
Error Control Coding
Standard 64-State Binary Convolutional Code
Punctured to achieve various data rates
IFFT
128 points
100 data, 12 pilot, 10 guard, 6 null
Matthew B. Shoemake, WiQuest

6. Packet at Baseband Each OFDM symbol is 312.5 ns long containing:
September 2004
Packet at Baseband
Each OFDM symbol is ns long containing:
ns null cyclic prefix
ns of data transmission
- 9.5 ns guard
Number of OFDM Symbols:
- Packet sync: 21
- Frame sync: 3
- Channel estimation: 6
- PLCP header: 12
- Payload: Variable (54 at left)
Matthew B. Shoemake, WiQuest

7. September 2004
Spectrum
DAC converter rate = 528 MHz
Tone width = MHz
Instantaneous Bandwidth
≈ 123 * MHz = 511 MHz
As characteristic of OFDM systems, signal rolloff is sharp yielding excellent adjacent channel interference characteristics
Matthew B. Shoemake, WiQuest

8. Band Groups Spectrum is divided into 14 bands
September 2004
Band Groups
Spectrum is divided into 14 bands
Bands are spaced at 528 MHz
Five band groups are defined
Enables structured expansion f
3432
MHz
3960
4488
Band #1 #2 #3
Each Time Frequency Code (TFC) corresponds to a Logic Channel
Logical Channels enable Simultaneously Operating Piconets (SOPS)
Four SOPS are enabled on Band Group1
Matthew B. Shoemake, WiQuest

9. AWGN Performance Noise Bandwidth ≈ 500 MHz Noise Floor ≈ -87 dBm
September 2004
AWGN Performance
Noise Bandwidth ≈ 500 MHz
Noise Floor ≈ -87 dBm
Matthew B. Shoemake, WiQuest

10. Enhancements to Proposal
September 2004
Enhancements to Proposal
Changes made since July 2004:
55 Mbps changed to 53 1/3 Mbps
Lower PAR Channel Estimation sequence included
Mapping of data tones onto guard tones
Matthew B. Shoemake, WiQuest

11. Features Regulatory Robustness
September 2004
Features
Regulatory
Meets FCC requirement for 500 MHz minimum bandwidth
Maximally flexible for regulatory expansion due spectral sculpting capability
Robustness
Time Frequency Coding provides frequency diversity gain and robustness to interference
Matthew B. Shoemake, WiQuest

12. System Performance (3-band)
September 2004
System Performance (3-band)
The distance at which the Multi-band OFDM system can achieve a PER of 8% for a 90% link success probability is tabulated below:
Includes losses due to front-end filtering, clipping at the DAC, ADC degradation, multi-path degradation, channel estimation, carrier tracking, packet acquisition, no attenuation on the guard tones, etc.
Range
AWGN
LOS: 0 – 4 m CM1
NLOS: 0 – 4 m CM2
NLOS: 4 – 10 m CM3
RMS Delay Spread: 25 ns CM4
110 Mbps
21.4 m
12.0 m
11.5 m
10.9 m
200 Mbps
14.6 m
7.4 m
7.1 m
7.5 m
6.6 m
480 Mbps
9.3 m
3.2 m
3.0 m
N/A
Matthew B. Shoemake, WiQuest

13. Signal Robustness/Coexistence
September 2004
Signal Robustness/Coexistence
Assumption: Received signal is 6 dB above sensitivity.
Values listed below are the required distance or power level needed to obtain a PER  8% for a 1024 byte packet at 110 Mb/s and operating in Band Group #1.
Coexistence with IEEE b and Bluetooth is relatively straightforward because they are out-of-band.
Multi-band OFDM is also coexistence friendly with both GSM and WCDMA.
MB-OFDM has the ability to tightly control OOB emissions.
Interferer
Value
IEEE 2.4 GHz
dint  0.2 meter
IEEE 5.3 GHz
Modulated interferer
SIR  -9.0 dB
Tone interferer
SIR  -7.9 dB
Matthew B. Shoemake, WiQuest

14. PHY-SAP Throughput Assumptions:
September 2004
PHY-SAP Throughput
Assumptions:
MPDU (MAC frame body + FCS) length is 1024 bytes.
SIFS = 10 ms.
MIFS = 2 ms.
MPDU (MAC frame body + FCS) length is 4024 bytes.
Number of frames
110 Mb/s
200 Mb/s
480 Mb/s 1
Mode 1: 80.4 Mb/s
Mode 1: Mb/s
Mode 1: Mb/s 5
Mode 1: 88.7 Mb/s
Mode 1: Mb/s
Mode 1: Mb/s
Number of frames
110 Mb/s
200 Mb/s
480 Mb/s 1
Mode 1: 98.5 Mb/s
Mode 1: Mb/s
Mode 1: Mb/s 5
Mode 1: Mb/s
Mode 1: Mb/s
Mode 1: Mb/s
Matthew B. Shoemake, WiQuest

15. PHY Complexity Unit manufacturing cost (selected information):
September 2004
PHY Complexity
Unit manufacturing cost (selected information):
Process: CMOS 90 nm technology node in 2005.
CMOS 90 nm production will be available from all major SC foundries by early 2004.
Die size for the PHY (RF+baseband) operating in Band Group #1:
Active CMOS power consumption for the PHY (RF+baseband) operating in Band Group #1 :
Process
Complete Analog*
Complete Digital
90 nm
3.0 mm2
1.9 mm2
130 nm
3.3 mm2
3.8 mm2
* Analog Component area.
Process
TX (55 Mb/s)
TX (110, 200 Mb/s)
RX (55 Mb/s)
RX (110 Mb/s)
RX (200 Mb/s)
90 nm
85 mW
128 mW
147 mW
155 mW
169 mW
130 nm
104 mW
156 mW
192 mW
205 mW
227 mW
Matthew B. Shoemake, WiQuest

16. September 2004
MB-OFDM Support
MultiBand OFDM has an unprecedented level of support and serves the needs of:
Major Personal Computer manufacturers
Major Mobile Phone manufacturers
Major Consumer Electronics manufacturers
Major Software companies
Component manufacturers
Test equipment manufacturers
Matthew B. Shoemake, WiQuest

17. MB-OFDM Advantages MB-OFDM   Piconets Supported 16
September 2004
MB-OFDM Advantages
MB-OFDM
Piconets Supported 16
Extendable to high rate/longer range
Yes, via industry standard techniques
Coding
64-State Binary Convolutional Code
Regulatory Flexibility
High
Clear Channel Assessment
Robust, Non-preamble-based Mechanism
Multipath Immunity
Inherent from OFDM
Spectral Sculpting 
Industry Support

WiMedia Support
Exploits Moore’s Law
Matthew B. Shoemake, WiQuest

18. MB-OFDM Submissions (1 of 2)
September 2004
MB-OFDM Submissions (1 of 2)
MB-OFDM Update and Overview, Matthew B. Shoemake (WiQuest), doc
MB-OFDM Specification, Anuj Batra (Texas Instruments), et al., doc
Market Needs for a High-Speed WPAN Specification, Robert Huang (Sony) and Mark Fidler (Hewlett Packard), doc
MB-OFDM for Mobile Handhelds, Pekka A. Ranta (Nokia), doc
In-band Interference Properties of MB-OFDM, Charles Razzell (Philips), doc
Matthew B. Shoemake, WiQuest

19. MB-OFDM Submissions (2 of 2)
September 2004
MB-OFDM Submissions (2 of 2)
Spectral Sculpting and Future-Ready UWB, David Leeper (Intel), Hirohisa Yamaguchi (TI), et al., doc
CCA Algorithm Proposal for MB-OFDM, Charles Razzell, doc
What is Fundamental?, Anuj Batra, et al., doc
Time to market for MB-OFDM, Roberto Aiello (Staccato), Eric Broockman (Alereon) and David Yaish (Wisair), doc
Matthew B. Shoemake, WiQuest

20. Summary Inherent Multipath Capture and Immunity
September 2004
Summary
Inherent Multipath Capture and Immunity
High Performance Error Control
Range/rate extendable
Spectral Sculpting for Global Expandability
Superior channelization
Low Cost and Power Consumption
Matthew B. Shoemake, WiQuest

21. September 2004
Select References
, MultiBand OFDM September 2003 presentation, Anuj Batra
, MultiBand OFDM Physical Layer Presentation, Roberto Aiello and Anand Dabak
, MultiBand OFDM January 2004 Presentation, Roberto Aiello, Gadi Shor and Naiel Askar
, C-Band Satellite Interference Measurements TDK RF Test Range, Evan Green, Gerald Rogerson and Bud Nation
, Coexistence MultiBand OFDM and IEEE a Interference Measurements, Dave Magee, Mike DiRenzo, Jaiganesh Balakrishnan, Anuj Batra
, Video of MB-OFDM, DS-UWB and AWGN Interference Test, Pat Carson and Evan Green
Matthew B. Shoemake, WiQuest