| 摘要 |
<p>PURPOSE:To prevent the generation of noises while simplifying and miniaturizing the construction of a finder with a reduction in the number of switches for selection of vibrators by arranging matched filters for pulse compressing a recevied wave output of an incoming signal as specified. CONSTITUTION:Matched filters used to pulse compress an incoming recevied wave output by a pulse response are compsed of an A/D converter 50, memory circuits 51 and 53, a controller 55 for controlling writing and reading required thereby, a multiplier 52, an accumulator 54 ad the like. Recived wave outputs from wave receivers within the range of 90 deg., are subjected to A/D conversion sequentially applied to the multiplier 52 via the memory device 51 and multiplied by a weight responded from the memory device 53 to be accumulated into the accumulator 54. Then, according to the results of a required integration, a received wave beam whose center angle is within 90 deg. is outputted to indicate a bearing. This eliminates interpolators or the like making the selection of vibrators simple and easy to perform. Reduced number of switches for selection of vibrators can simplify the miniaturize the construction of a finder while preventing the generation of switching noises.</p> |
