Doc.: IEEE 802. 15-06-0250-00-wng0_LC-FMUWB Submission Jacksonville, FL May 2006 J. Farserotu, CSEM, CHSlide 1 Project: IEEE P802.15 Working Group for

Jacksonville, FL May 2006

J. Farserotu, CSEM, CHSlide 1

doc.: IEEE 802.15-06-0250-00-wng0_LC-FMUWB

Submission

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

Submission Title: Low Complexity FM-UWB for Short Range LDR DevicesDate Submitted: May, 2006Source: John Farserotu, CSEM, SwitzerlandVoice: +41 32 720-5482, e-mail: [email protected]

Re: [N/A]

Abstract: This document presents low complexity FM-UWB for BAN/PAN optimised LDR devices.

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.




Submission

LOW COMPLEXITY FM-UWB FOR SHORT RANGE LDR DEVICES

J. Farserotu ([email protected]) and J. Gerrits

CSEM, Switzerland




Submission

PN User

A Personal Network (PN) is a new paradigm extending the concept of a Personal Area Network (PAN), to allow users secure access to all their personal devices and services regardless of geographical location

PN devices can be separated by hundreds of kilometers, and still belong to the same PN

PNs encompass all connection technologies, short and medium range radio, infrastructure wireless networks or any future broadband wireless technology

MAGNET BEYOND AND PNs

Private PAN

PNs represent a potential mass market for short range wireless personal sensor devices




Submission

MAGNET BEYOND STANDARDISATION TASK FORCE

• MAGNET Beyond partners– 34 partners from around the world. Experts on PNs.

• MAGNET Standardisation Task Force (MSTF)– Promotion of the results of MAGNET for standardisation towards the realisation of the

mass market potential of PNs.

• FM-UWB– An important result of the project and a focus of the MSTF activities and the MSTF seeks

a standard for LDR FM-UWB

• MSTF members supporting FM-UWB standardisation– Nokia, Philips, CEA-LETI, CSEM,…




Submission

WHY A STANDARD?

• The need– A mass market standard for future UWB LDR devices

• The opportunity and market relevance– Multitude of simple, short range, LDR devices

• The benefits – Commercial and practical

• What is in it for us?– Unlocking the potential of FM-UWB and realisation of PN

optimised solutions




Submission

SHORT RANGE, LDR WIRELESS DEVICES IN THE NOMADIC P-PAN or BAN

• LDR optimised solutions• Short range communication

• Low power consumption

• Robust and reliable

• Low cost devices

• Nomadic, go anywhere

• Good coexistence

• Small form factor

• Precise localisation not required

Unrestricted in geographic span!

P-PAN

Cellular, WLAN,…




Submission

LOW COMPLEXITY FM-UWB TRANSCEIVER

fsub = 1 MHzfsub = 100 kHz = 2

100 kbpsdata

fRF = 4000 MHzfRF = 600 MHz = 600 PRF = 100 W

Encode/Scramble

SubcarrierModulator

SubcarrierGenerator

RFOscillator

FM-UWB Tx

Simple FM transmitter

Pre-ampWidebandFM demod

Subcarrierfilter

& demod1

Subcarrierfilter

& demod2

Subcarrierfilter

& demodn

Decode/scramble1

Decode/scramble2

Decode/scramblen

d1(t)

d2(t)

dn(t)

FM-UWB Rx

Simple scalable receiver

4.2-4.8 GHzor

7.3 -8.5 GHz1-2 MHz

No receive LO, no carrier sync




Submission

FM-UWB FOR SHORT RANGE, LDR DEVICES

• True low complexity UWB system

– Relaxed HW specs (e.g. noise)

– No LO, no carrier snync

– Antennas not critical

• Low power consumption

– Est. 3.5 mW (Tx), 7.5 mW (Rx)

– FDMA-like access possible

• Robustness

– Interference and multipath

– Analogue spread spectrum

• Coexistence and mobility

– Steep spectral roll-off

– Fast acquisition

• Full working prototype

• First true low complexity UWB system…

• IC building blocks now in development

Any system can be LDR, but that does not make it low complexity, low power, low cost!




Submission

EXAMPLE NOMADIC PAN LDR DIABETES SCENARIO

1. Nominally, a few bytes per control message, 1 message per minute2. When transmitting. In this example, operation 1 min out of every 10 is considered, on average.

Device no.

Type Data block size Block rate

0 Coordinator (receiver) Arbitrary Arbitrary

1 Blood pressure sensor 64 bit 1 block/minute

2 ECG sensor2 1024 bit 10 blocks/second

3 Respiratory sensor 64 bit 10 blocks/second

4 Clinical thermometer 8 bit 1 block/second

5 Pulse sensor (ear) 8 bit 1 block/second

P-PAN

Sensor transmit data

P-PAN

Sensor receive control1

Coordinator Coordinator




Submission

RELATIVE POWER CONSUMPTIONFOR SENSOR TRANSMISSION IN THE PAN

200.0

35.822.0

312.0

195.0

0.8

60.0

0.1 0.30.0 2.50.30

50

100

150

200

250

300

350

Blood pressure sensor ECG sensor Respiratory sensor Clinical thermometer

Ave

rag

e p

ow

er i

n d

BW

ZigBee

FM-UWB

ISM band

Notes: 1. Based on the MAGNET diabetes scenario, Tx communications only

Threshold for energy scavenging




Submission

FIRST STEPS AND KEY ISSUES

• Standard: The MSTF seeks to establish an IEEE802.15.4 work

item with the aim of developing a standard (or amendment) for

short range, low complexity, LDR FM-UWB devices.

• Regulatory: Interference, co-existence and the ECC decision

– Low frequency band (4.2 GHz – 4.8 GHz)

• Pulse Repetition Frequency (PRF)

• Low Duty Cycle (LDC)

• Detect And Avoid (DAA)

• June 10 2010

– High frequency band (7.25 GHz – 8.5 GHz)

• PRF




Submission

EXAMPLE IR-UWB SPECTRUM

Proposed CEPT mask

Triangular pulse envelope t = 11 ns

-76 dBm/MHz at 4 GHz ≈ 35dB




Submission

FM-UWB SPECTRUM

-121 dBm/MHz at 4 GHz

Constant envelope modulation, extremely rapid spectral rolloff!

Spectral rolloff more than 45 dB lower than IR-UWB in the 3-4 GHz band!

≈ 80 dB




Submission

CONCLUDING REMARKS

• FM-UWB offers a simple, low power, yet robust solution for short range, LDR devices.

• PAN optimised– Simple star network– Short range, LDR communication from the sensor to a master– Very low data rate control from the master to sensor device– Receive power limited transceiver

• Very rapid spectral rolloff results in ultra low interference to other systems and excellent co-existence!

• The MAGNET Beyond Standardisation Task Force seeks to launch an IEEE802.15.4 work item aimed at standardisation of FM-UWB for short range, LDR devices.




Submission

Thank you

Documents

Doc.: IEEE 802. 15-06-0250-00-wng0_LC-FMUWB Submission Jacksonville, FL May 2006 J. Farserotu, CSEM, CHSlide 1 Project: IEEE P802.15 Working Group for