DIRECTIONAL COSINE ESTIMATION SYSTEM

摘要

PURPOSE:To eliminate estimated errors in the spatial frequency by multiplying a beam former output by a reciprocal of the wave receiving sensitivity. CONSTITUTION:Registers 521-52N memorizes a reciprocal of a value in an spatial frequency of a directional pattern of an element, namely, a value of a reciprocal of the element sensitivity as constant. Multipliers 511-51N calculate the product of the constant and an output of a beam former 23 and outputs it to a maximum point detector 24 and an interpolator 25. The interpolator 25 interpolates a multibeam output in the vicinity of the spatial frequency and outputs a beam output as continuous function of the spatial frequency. The maximum point detector 26 outputs a spatial frequency and a converter 27 outputs a directional cosine.