A frequency domain realization of an optimal partially adaptive sensor array

This paper extends the recently introduced cross-spectral approach for reducing the degrees of freedom in partially adaptive array processing by considering a frequency domain realization without an eigendecomposition. In space communications, as with all space-segment and airborne sensor processing, size-weight-power platform constraints coupled with the desire or requirement for large element arrays and space-time adaptive processing make fully adaptive array processors unrealizable. We now introduce a method for partially adaptive sensor array processing which exhibits a low computational complexity and obtains the performance of fully adaptive processors