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The main array of SuperDARN radars is used both for radio wave emission and reception of echoes.
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In this paper, both the weight vector of the main array and the steering vector of the auxiliary array can be obtained.
However, the beampattern of the main array still points to the incorrect direction of the desired signal.
It is worth mentioning that the operation above needs to set the initial value of the complex weights as w m = w pre, where w pre is the initial quiescent weights of the main array constructed based on the presumed DOA of the desired signal.
Straightforwardly, the optimum solution of (21) can be given by the eigenvector corresponding to the largest eigenvalue of matrix M 3. Hence, the proposed estimate of the complex weights of the main array can be expressed as follows {widehat{mathbf{w}}}_m=frac{sqrt{N_m}}{leftVert {mathbf{v}}^{mathbf{prime}}rightVert }{mathbf{U}}_1^{mathbf{prime}}{mathbf{v}}^{mathbf{prime}} (24).
However, the gain loss of the main array may still cause the output SINR deterioration in the case of the DOA mismatch.
where s m is the steering vector of the main array located in direction θ.
Up to the present, this paper has estimated the steering vector of the desired signal toward the auxiliary array and renovated the complex weights of the main array.
In all cases, the GSC structure is composed of the main array with 16 antenna elements and the auxiliary array with 5 antenna elements.
where ( {mathbf{w}}_min {mathrm{mathbb{C}}}^{N_mtimes 1} ) denotes the quiescent weights of the main array commonly pointing to the desired signal's DOA.
The array is composed of 2.4kb monomers in tandem with one partial monomer inverted and 210 kb distal to the main array.
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