When adaptive nullsteering is applied to attenuate interfering signals which are received via the main lobe, two limitations manifest themselves: the sidelobe level increases and the peak of the main beam shifts away from the desired look direction (squinted main beam). A two-step method is described which maintains angular accuracy even under main lobe interference conditions. In the first step, adaptive nullsteering is performed to enable the detection of targets; the distortion of the main beam is allowed. In the second step, high-resolution angle estimation techniques are used to obtain the angles of the target and the interference sources. The procedure requires prior knowledge of the number of interfering signals; an interference map can be used to provide this information.<>
On combining adaptive nullsteering with high resolution angle estimation under main lobe interference conditions
IEEE Aerospace and Electronic Systems Magazine ; 5 , 11 ; 16-18
01.11.1990
213845 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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