EE625 Research Presentation By Ryan Dillon September, 2014.
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Transcript of EE625 Research Presentation By Ryan Dillon September, 2014.
Introduction Why Bluetooth The Band Flavors of Bluetooth FCC Standards Modeling Conclusion Questions
Content
Named after Danish King: Harald Blitand
Short range (~10m)
Bluetooth Special Interest Group (SIG)◦ IBM, Intel, Nokia and Toshiba in 1998◦ Started with 70 members, now >20,000
Introduction
Why Bluetooth?
Why How
Communication while Mobile
Eliminates Cable Common Low-Cost Universal Low Interference
Rates Power Efficient Protected
Technology has allowed for lightweight low power
Operation in GHz band allows for larger bandwidth
<$5 Chipsets IEEE Standards and SIG Low transmission energy FHSS Viterbi Cyclic Encoding
ISM (Industrial Scientific Medical) Unlicensed Band◦ 915MHz, 2.4GHz, 5GHz
Etiquette◦ Listen before you talk◦ Low Tx Power◦ Restricted duration
Increasing congestions◦ WLAN is heading to the 5GHz range◦ Some going to the 17.1GHz range
The Band
Class
Max. permitted power Typ.
range[13]
(m)(mW) (dBm)
1 100 20 ~100
2 2.5 4 ~10
3 1 0 ~1
Flavors of Bluetooth
Version Data rateMax.
application throughput
1.2 1 Mbit/s >80 kbit/s
2.0 + EDR 3 Mbit/s >80 kbit/s
3.0 + HS 24 Mbit/s <24 Mbits/s
4.0 24 Mbit/s<24 Mbits/s-Wi-Fi Std-Low Energy
802.11 - 2Mbs◦ Direct Sequence Frequency Hoping Spread
Spectrum .b High-Rate - 11Mbs .g - 22Mbs .a - 54 Mbs
◦ Orthogonal Frequency Division Multiplex◦ 5 GHz
FCC 802 Standards
Data Modulation◦ IF FSK with Viterbi Cyclic Encoding
Complex Phase Modulator (CPM) 6th order Viterbi Cyclic Encoding
FHSS◦ Frequency Shift Key (FSK)◦ Signal is spread onto 1 MHz channel◦ 79 Channels in the band◦ 1600 Hops per second
Modulation & FHSS
NetworkingConnection
Architecture
Inquiries◦ Address, Clock, Unique Info
Host◦ High Level Logic Link Control
(LLC) Client
◦ Link Manager (radio, baseband )
Infrastructure Ad-Hoc Scatternets
◦ Best suited◦ 7 Active Links◦ 255 inactive
[3][4]
Matlab Central file exchange Transmitter Receiver Random integer generator (1-79) Channel Bit Error Rate
System Modeling
[1]
Data conditioning◦ 10 samples per frame◦ Viterbi 10/15, 6th order encoder◦ 625 bit packet
Modulation◦ Continuous Phase Modulation
Progressive phase modulation◦ Convolved with FSK
79 channels 100 times the data rate
Transmitter
[1]
Future Technology◦ 2.4GHz is getting full◦ 5 and 17.1 GHz prospected◦ More bandwidth◦ Orthogonal FDM
Future Applications◦ Industrial Automation◦ Complete wire replacement
Conclusion
[2]
[1] Amperordirect.com, "Class 1 Bluetooth Dongle Test," Amperordirect, [Online]. Available: http://www.amperordirect.com/pc/r-electronic-resource/z-reference-bluetooth-class1-myth.html. [Accessed 30 August 2014].
[2] Bluetooth Organization, "Profiles Overview," bluetooth.org, [Online]. Available: https://developer.bluetooth.org/TechnologyOverview/Pages/Profiles.aspx. [Accessed 30 August 2014].
[3] National Institute of Standards and Technology, "Guide to Bluetooth," September 2008. [Online]. Available: http://large.stanford.edu/courses/2012/ph250/roth1/docs/890066.pdf. [Accessed 30 August 2014].
[4] S. R. Reddy, "Bluetooth in Wireless Communication," IEEE Communications Magazine, no. June, pp. 90-96, 2002.
[5] Mathworks, "Matlab Central," 10 September 2001. [Online]. Available: http://www.mathworks.com/matlabcentral/fileexchange/722-bluetooth-modulation-and-frequency-hopping. [Accessed 30 August 2014].
[6] University of Ouro Preto, "Characterization of FHSS in Wireless Personal Area," IEEE, Vols. 978-1-4673-5699-2, no. 13, pp. 39-44, 2013.
References