DECAWAVE_CONNELL_IEEE802.15.4芯片资料a.pdfVIP

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DECAWAVE_CONNELL_IEEE802.15.4芯片资料a.pdf

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DECAWAVE_CONNELL_IEEE802.15.4芯片资料a

IEEE802.15.4a: Ultra Low Power Transceiver for Wireless Sensors Enabling Precision Location Mr Ciaran Connell (CEO) Mr Michael McLaughlin (President CTO) Page 1 DecaWave Wireless Factory Workshop 15 -16 December 2008 – ETSI, Sophia Antipolis, France “The Internet of Things” A World where anybody or anything can locate and communicate with any other body or thing, made possible by pervasive, extremely low power, low cost, high data rate wireless transceivers. Our Vision Page 2 UWB for Precision Locating Time Direct path through partition (Time of flight for this 1st path gives distance) Reflection off ceiling Reflection off wall then ceiling Page 3 Reflection off wall (Receive Signal Strength is dominated by this path which has been attenuated by long flight path) Resolving Multipath Components, given that ? Resolution α 1/BW ? d = c.t thus ? 802.15.11: 20MHz 1/BW = 0.05μs = 15m = low resolution ? 802.15.4a: 1300MHz 1/BW = 0.8ns = 24cm = very high resolution Wireless Personal Area Network IEEE802.15.1 (Bluetooth) RFID IEEE802.15.4 (ZigBee) IEEE802.15.3a IEEE802.15.4a IEEE802.15.3c IEEE802.15.6 Utility Cordless Identification Control File Transfer (Wireless USB) Location plus Control Video Link (Wireless MM) Body Area Networks Freq Range 2.40-2.48 GHz 1 band in kHz 8 bands in MHz 3 bands in GHz 868 MHz 902-928 MHz 2.40-2.48 GHz 3-10 GHz (USA) 6-8.5 GHz (Europe) 7-9 GHz (Japan) 3-10 GHz (USA) 6-8.5 GHz (Europe) 3 bands in 60GHz Band (2 bands similar US Japan, 1 different) Modulation GFSK, π/4 DQPSK, 8PSK FSK, ASK, PSK, BPSK, FM, AM BPSK(868/915MHz) OQPSK(MSK) (2.4GHz) QPSK (MB-OFDM) BPSK/QPSK (DS-UWB) PPM with BPSK In standards discussion Multiple Access FHSS TDMA/FDMA CSMA/CA TFI-OFDM (MB-OFDM) Ternary CDMA (DS-UWB) FDM / CDMA / Time Hop Duplex Page 4 Source: IEEE DecaWave (Uplink/Downlink) TDD TDD, TDM TDD TDD TDD Channel Bandwidth 1 MHz Typically 200kHz/500kHz 2 MHz 528 MHz(MBOFDM) 1.368GHz, 2.736GHz (DS-UWB) 500MHz, 1.3GHz # Ch