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老式雷达动目标显示系统(MTI)比较落后,低空性能差,其原因之一是它装备的是纯模拟信号处理对消设备,由于其设备复杂,多数采用一次对消。这些对消器性能较低,对消比及动态范围多为30～35分贝,且功能简单,稳定性及可靠性都很差。在实际使用中受环境(特别是温度)影响,往往达不到预定的性能指标,有的雷达对消器几乎每次开机都要调整,给使用单位带来很多不便。 70年代初,数字技术在雷达信号处理中得到了广泛的应用。数字对消器具有潜在的高精度、高灵活性及高可靠性,但由于受我
One of the reasons why the old radar moving target display system (MTI) lags behind and its low altitude performance is poor is that it is equipped with a pure analog signal processing cancellation device. Because of its complicated equipment, most applications use one cancellation. These canceller performance is lower, the elimination ratio and the dynamic range of more than 30 to 35 dB, and the function is simple, stability and reliability are poor. In actual use by the environment (especially the temperature), often fail to meet the predetermined performance indicators, and some radar canceller almost every boot must be adjusted to the use of the unit to bring a lot of inconvenience. In the early 1970s, digital technology was widely used in radar signal processing. Digital canceller has the potential of high accuracy, high flexibility and high reliability, but due to me