where (·)H stands for the Hermitian transpose, and ˆRy is the
estimate of the covariance matrix. The matrix ˆRy is given
by ˆRy = (1/W)
t y(t)yH(t), where W is the number of
snapshots. Then, the power function of the high-resolution
Capon beamformer is given by
PCapon(θ, D, v) =