Q. Zhang et Wb. Mikhael, ESTIMATION OF THE CLUTTER RANK IN THE CASE OF SUBARRAYING FOR SPACE-TIME ADAPTIVE PROCESSING, Electronics Letters, 33(5), 1997, pp. 419-420
A simple formula for estimating the clutter rank in the case of subarr
aying is derived. The well-known Brennan's rule can be viewed as a spe
cial case of this formula. With the help of this formula, an insight i
nto the eigenspectrum structure of the clutter in the case of subarray
ing can be achieved, and can be used to design an optimal subarraying.
The simulation also verifies the accuracy of this formula.