Aj. Weiss et B. Friedlander, COMPARISON OF SIGNAL ESTIMATION USING CALIBRATED AND UNCALIBRATED ARRAYS, IEEE transactions on aerospace and electronic systems, 33(1), 1997, pp. 241-249
We consider the problem of separating and estimating the waveforms of
superimposed signals received by an array of sensors. If the array is
well calibrated it is possible to first estimate the directions of arr
ival (DOA) of the signals and then use this information to separate th
e signals. When the array is not calibrated, but the array elements ha
ve the same unknown gain pattern, up to an unknown multiplicative fact
or and the phases of the elements are arbitrary and unknown, it is pos
sible to estimate the array steering vectors and then use this informa
tion for signal estimation. We compare the quality of the estimated si
gnals in the calibrated case with the quality of the estimated signals
in the uncalibrated case, in terms of the output signal-to-interferen
ce ratio (SIRO) and output signal-to-noise ratio (SNRO).