Direction-of-arrival (DOA) estimation under low signal-to-noise ratio (SNR) and snapshot deficient scenarios has practical application value. Since the array output of the uniform linear array (ULA) can be viewed as a linear combination of the equal interval sampling complex exponentials. it can be annihilated by a spatial annihilating filter and the DOAs are able to be obtained from ... https://foldlyers.shop/product-category/waffle-maker/