View Full Document

DATA COMPRESSION



View the full content.
View Full Document
View Full Document

6 views

Unformatted text preview:

GEOMETRY ADAPTIVE DATA COMPRESSION FOR TDOA FDOA LOCATION Mo Chen and Mark L Fowler Department of Electrical and Computer Engineering State University of New York at Binghamton mchen0 mfowler Binghamton edu ABSTRACT The location of an emitting target is estimated by intercepting its emitted signal and sharing them among several sensors to measure the time difference of arrival TDOA and the frequency difference of arrival FDOA Doing this in a timely and energy efficient fashion which is especially important for wireless sensor network applications requires effective data compression Since the commonly used MSE distortion measure is only weakly related to optimal TDOA FDOA estimation in this paper we derive a new class of non MSE distortion measures for TDOA FDOA estimation using the concept of Fisher information We then use these new distortion measures to compress the data using a wavelet packet transform and show that it improves TDOA FDOA estimation accuracies relative to using the MSE based compression Finally the scheme of applying our algorithms in a wireless sensor network is proposed and energy efficiency and accuracy enhancement of the proposed scheme over that of traditional scheme using MSE is shown through the simulations 1 INTRODUCTION A common way to locate an electromagnetic emitter is to measure the time difference of arrival TDOA and the frequency difference of arrival FDOA between signals received at pairs of sensors 1 2 This requires that the samples of one signal are sent over a data link where data compression can reduce latency and save energy Some past results are available on the issue of compression for TDOA FDOA applications 3 7 but only recently have researchers begun to explore other than the standard meansquare error MSE distortion measure 5 7 We introduced a new non MSE distortion measure 5 that uses a CRLB based measure for the TDOA only problem However we have found 5 that optimizing this measure was difficult because the form that the



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view DATA COMPRESSION and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view DATA COMPRESSION and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?