| 摘要 |
FIELD: selection of moving targets. SUBSTANCE: the offered moving target selection device with quadrature-phase input video signals is featured by the fact that it has a single-sideband video signal deriving unit. The moving target selection device with such a unit makes up a moving target selection device with a single sideband. As a result of introduction of the single-sideband video signal deriving unit, the moving target selection device acquires the following properties: the single-values measurement range of Doppler frequency at a constant repetition frequency doubles and attains the repetition frequency doubles and attains target selection devices with processing at the video frequency make it possible to determine the Doppler frequency only to the half of the repetition frequency. The device provides for quadrature processing (elimination of "blind" phases) without the second unit of moving target selection. The device can provide for measurement of the target Doppler frequency sign (direction of target movement). The two latter properties are also ensured in the repetition frequency wobbulation conditions. The single-sideband video signal deriving unit can be used in all moving target selection units and pulsed Doppler systems. EFFECT: enhanced reliability. |
