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Application to Wireless Networking: Tracking Sources in Real Time

  • Danko Antolovic
Chapter

Abstract

In this chapter, we begin to make the connection between the radiolocation proper, that we have discussed so far, and the data communication within which the radiolocation is meant to function. In other words, we want to start using our radiolocator in real wireless networking.

We have said this already, but let us repeat the fundamental requirements: Radiolocation in digital communication should be done on a per-packet basis, and it should be done at the pace of the communication itself, i.e., in real time. Also, by radiolocation, we consistently mean location of sources which, although legitimate interlocutors within some wireless standard, do not cooperate by informing us of their location; the only thing that they reveal about their position is the electromagnetic wave that they transmit. True radiolocation is, therefore, an out-of-channel process, independent of the content of the communication, and relying entirely on the properties of the radio wave. This is fundamentally different from either the GPS, which can be viewed as a form of range-finding with the help of collaborative beacons (satellites) (see e.g. Kaplan and Hegarty 2006), or from any schemes in which the transmitter embeds its own location data into the transmissions. The latter typically amount to broadcasting the location obtained from one’s own GPS receiver.

Unlike analog radio communication, digital communication is sporadic and interrupted, with data bundled into carrier bursts (packets) of finite duration, typically under a millisecond. Requirement that each and every packet be separately radiolocated is important for security applications: If a source does not want to be located, it will naturally seek to send few packets, and send them sporadically, at irregular intervals. Radiolocation methods that rely on continuous traffic to reconstruct the source’s location will be easily foiled by such simple stratagems.

Keywords

Beacon Frame Baseband Processing Packet Counter Serial Architecture Baseband Processor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Antolovic, D. Architecture of a 802.11b Access Point with Single-Packet Radiolocation, Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), Las Vegas NV, March-April 2008 (2008)Google Scholar
  2. Gast, M.S. 802.11 Wireless Networks, 2nd edition, O’Reilly, CA (2005)Google Scholar
  3. Intersil Corporation. Data sheet for HFA3863 (2000)Google Scholar
  4. Jow, A., Schurgers, C., Palmer, D. CalRadio: A Portable, Flexible 802.11 Wireless Research Platform, Proceedings of MobiEval’07, San Juan, Puerto Rico, June 2007; also http://calradio.calit2.net/ (2007)
  5. Kaplan, E.D., Hegarty, C.J., eds., Understanding GPS: principles and applications, 2nd edition, Artech (2006)Google Scholar
  6. Maxim Integrated Products. Data sheet for MAX2820. http://www.maxim-ic.com/ (2003)
  7. Razavi, B. RF Microelectronics, Prentice Hall, NJ (1998)Google Scholar
  8. Sklar, B. Digital Communications, 2nd edition, Prentice Hall, NJ (2001)Google Scholar
  9. Texas Instruments. TMS320C54x DSP Functional Overview (2000)Google Scholar
  10. Texas Instruments. TMS320VC5471 Fixed-Point DSP Data Manual (2002)Google Scholar
  11. Wolf, W. Computers as Components, Elsevier, Amsterdam (2005)Google Scholar

Copyright information

© Springer-Verlag US 2010

Authors and Affiliations

  1. 1.University Information Technology ServicesIndiana UniversityBloomingtonUSA

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