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:

  1. Dianne O'Leary,
    The Direction of Arrival Problem: Coming at You,
    Computing in Science and Engineering,
    Volume 5, Number 6, November/December 2003.
  2. 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 )
      

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Last revised on 10 February 2009.