Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

RF Ranging for Location Awareness

Steven Michael Lanzisera and Kristofer Pister

EECS Department
University of California, Berkeley
Technical Report No. UCB/EECS-2009-69
May 19, 2009

http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009-69.pdf

Wireless sensor networks provide an opportunity to improve performance in areas ranging from energy efficiency to industrial processes to scientific research. Many applications require awareness of sensor location, but autonomously determining device location has proven to be challenging. This localization problem can be divided into two parts: measuring relationships between nodes, and then using these relationships to estimate location. Most work on the first part has measured the RF received signal strength as a surrogate for range resulting in poor location accuracy. Several other methods have been studied with varying performance and limitations. The second part has received significant research attention resulting in several good algorithms. This work considers the first part of the localization problem and discusses RF time of flight ranging for location awareness in local area networks. A roundtrip RF time of flight ranging method for narrow-band radios is presented that successfully deals with the many error sources that cause RF based ranging methods to suffer from poor accuracy and high system complexity. This method has been implemented on a custom software defined radio platform and a network of these devices has demonstrated meter level location accuracy.

Advisor: Kristofer Pister


BibTeX citation:

@phdthesis{Lanzisera:EECS-2009-69,
    Author = {Lanzisera, Steven Michael and Pister, Kristofer},
    Title = {RF Ranging for Location Awareness},
    School = {EECS Department, University of California, Berkeley},
    Year = {2009},
    Month = {May},
    URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009-69.html},
    Number = {UCB/EECS-2009-69},
    Abstract = {Wireless sensor networks provide an opportunity to improve performance in areas ranging from energy efficiency to industrial processes to scientific research.  Many applications require awareness of sensor location, but autonomously determining device location has proven to be challenging. This localization problem can be divided into two parts: measuring relationships between nodes, and then using these relationships to estimate location.  Most work on the first part has measured the RF received signal strength as a surrogate for range resulting in poor location accuracy. Several other methods have been studied with varying performance and limitations.  The second part has received significant research attention resulting in several good algorithms. 

This work considers the first part of the localization problem and discusses RF time of flight ranging for location awareness in local area networks. A roundtrip RF time of flight ranging method for narrow-band radios is presented that successfully deals with the many error sources that cause RF based ranging methods to suffer from poor accuracy and high system complexity. This method has been implemented on a custom software defined radio platform and a network of these devices has demonstrated meter level location accuracy.}
}

EndNote citation:

%0 Thesis
%A Lanzisera, Steven Michael
%A Pister, Kristofer
%T RF Ranging for Location Awareness
%I EECS Department, University of California, Berkeley
%D 2009
%8 May 19
%@ UCB/EECS-2009-69
%U http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009-69.html
%F Lanzisera:EECS-2009-69