公开(公告)号：US3660845A

公开(公告)日：1972-05-02

申请号：US3660845D

申请日：1970-01-05

Applicant: ERICSSON TELEFON AB L M

Inventor： PETTERSSON GEORGE GUSTAF LENNA

IPC: G01S7/28 ,  G04F10/04

CPC classification number: G04F10/04 ,  G01S7/28

Abstract: A radar unit arrangement for determining the position of the pulse center and the pulse duration of the received echo pulses. The echo pulses gate a number of subpulses to a first binary updown counter which counts the subpulses. A second binary up-down counter receives a pulse from the first each time a certain value is exceeded. A third binary counter indicates the time elapsed from the moment of the emitting a radar pulse. The contents of the second and the third binary counter are continuously compared in a comparator which each time equality is obtained activates a bistable circuit. The first and the second binary counters are controlled by the bistable circuit so as to switch the counting direction of the counter in such a way that the number of subpulses before and after the change of state of the bistable circuit will be the same.

Abstract translation: 雷达单元布置，用于确定脉冲中心的位置和接收的回波脉冲的脉冲持续时间。 回波脉冲将多个子脉冲门控到计数子脉冲的第二个二进制递减计数器。 第二个二进制递增计数器每次超过某个值时从第一个二进制递增计数器接收脉冲。 第三个二进制计数器指示从发出雷达脉冲之时起经过的时间。 在比较器中连续地比较第二和第三二进制计数器的内容，每当获得相等性时，激活双稳态电路。 第一和第二二进制计数器由双稳态电路控制，以便以双稳态电路状态改变之前和之后的子脉冲数相同的方式切换计数器的计数方向。