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

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Low Complexity FM-UWB for Short Range LDR Devices Date Submitted: May, 2006 Source: John Farserotu, CSEM, Switzerland Voice: +41 32 720-5482, e-mail: john.farserotu@csem.ch 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. J. Farserotu, CSEM, CH

2. LOW COMPLEXITY FM-UWB FOR SHORT RANGE LDR DEVICES J. Farserotu (john.farserotu@csem.ch) and J. Gerrits CSEM, Switzerland J. Farserotu, CSEM, CH

3. MAGNET BEYOND AND PNs 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 PN User Private PAN PNs represent a potential mass market for short range wireless personal sensor devices J. Farserotu, CSEM, CH

4. 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,… J. Farserotu, CSEM, CH

5. 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 J. Farserotu, CSEM, CH

6. P-PAN Cellular, WLAN,… 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! J. Farserotu, CSEM, CH

7. LOW COMPLEXITY FM-UWB TRANSCEIVER fsub = 1 MHz Dfsub = 100 kHz b= 2 Simple scalable receiver RF Oscillator Subcarrier Modulator Encode/ Scramble Subcarrier filter & demod1 Decode/ scramble1 Wideband FM demod Pre-amp d1(t) 100 kbps data 4.2-4.8 GHz or 7.3 -8.5 GHz Subcarrier filter & demod2 Decode/ scramble2 d2(t) 1-2 MHz Subcarrier Generator FM-UWB Tx • fRF = 4000 MHz • DfRF= 600 MHz • b= 600 • PRF = 100mW FM-UWB Rx Subcarrier filter & demodn Decode/ scramblen dn(t) Simple FM transmitter No receive LO, no carrier sync J. Farserotu, CSEM, CH

8. FM-UWB FOR SHORT RANGE, LDR DEVICES • True low complexity UWB system • Relaxed HW specs (e.g. f 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! J. Farserotu, CSEM, CH

9. EXAMPLE NOMADIC PAN LDR DIABETES SCENARIO • Sensor receive control1 • Sensor transmit data P-PAN P-PAN • Coordinator • Coordinator 1. Nominally, a few bytes per control message, 1 message per minute 2. When transmitting. In this example, operation 1 min out of every 10 is considered, on average. J. Farserotu, CSEM, CH

10. Threshold for energy scavenging RELATIVE POWER CONSUMPTIONFOR SENSOR TRANSMISSION IN THE PAN Notes: 1. Based on the MAGNET diabetes scenario, Tx communications only J. Farserotu, CSEM, CH

11. 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 J. Farserotu, CSEM, CH

12. ≈ 35dB • -76 dBm/MHz at 4 GHz • Proposed • CEPT mask EXAMPLE IR-UWB SPECTRUM Triangular pulse envelope t = 11 ns J. Farserotu, CSEM, CH

13. -121 dBm/MHz • at 4 GHz • ≈ 80 dB Spectral rolloff more than 45 dB lower than IR-UWB in the 3-4 GHz band! FM-UWB SPECTRUM • Constant envelope modulation, extremely rapid spectral rolloff! J. Farserotu, CSEM, CH

14. 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. J. Farserotu, CSEM, CH

15. Thank you J. Farserotu, CSEM, CH