COMPARISON OF SIGNAL ESTIMATION USING CALIBRATED AND UNCALIBRATED ARRAYS

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).