Project_04
The Direction of Arrival Problem
Coming at You
Project 4 looks at the problem of trying to determine the direction
from which narrow band electronic signals are arriving at an array
of pairs of sensing stations.
Reference:
-
Dianne O'Leary,
The Direction of Arrival Problem: Coming at You,
Computing in Science and Engineering,
Volume 5, Number 6, November/December 2003.
-
Dianne O'Leary,
Scientific Computing with Case Studies,
SIAM, 2008,
ISBN13: 978-0-898716-66-5,
LC: QA401.O44.
The data involves 720 observations of two signals. The data file
stores both the complex signal data X and the matrix of true angles
THETA measured in degrees. The signal data X has been perturbed by
a normally distributed random error with mean 0 and stardard deviation
of 1.
To copy the data into MATLAB, use the command
load doadata;
To get the DOA angle of the data X, use the MATLAB command
DOA = asin ( 4 * angle ( X ) / ( 2 * pi )
-
doadata.mat,
a MATLAB file containing the signal data X and the matrix THETA of true angles.
-
doadata.txt,
an ASCII text file containing the signal data X and the true angles THETA.
The file begins with the signal data, printed as 5 complex values per line,
followed by one blank line, followed by the matrix THETA, printed one
row per line.
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Last revised on 10 February 2009.