| 摘要 |
1348249 Pulse radar PLESSEY CO Ltd 24 June 1971 [3 July 1970] 32366/70 Heading H4D In a moving target indicating (M.T.I.) pulse radar of the kind utilizing one or more delay/ cancellers A a signal or signals above a predetermined amplitude applied to subtractor 3 are applied to a gating means 10, 11 to inhibit the passage of unsynchronized signals. In one embodiment means 10 is an exclusive-OR gate and 11 an inhibit gate, devices 9 being threshold gates; in another embodiment means 10 is an AND gate and 11 an "inverse inhibit" gate. In an M.T.I. system utilizing phase (I) and quadrature (Q) signals, handled on a time-shared basis, means sense coincidence or non-coincidence between I and I-delayed, or I and Q - delayed, or Q and Q-delayed, or Q and I- delayed. |
