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Clutter rejection and transmitter-receiver requirements in an airborne radar

机译：机载雷达的杂波抑制和收发器要求

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摘要

Ground clutter rejection requirements imposed on the exciter transmitter-receiver units of multirole airborne radar are examined. Methods are given to determine the characteristics of the units, such as noise, spurious spectral lines level, and analog-to-digital converter (ADC) dynamics, in both high- and medium-pulse-repetition-frequency modes of operation. It is shown that the spectral noise does not depend on either the wave form or the Doppler bandwidth. The reference oscillator spectral noise must be about -155 dB/sub c//Hz. The level of spurious lines generally depends only on the duty cycle, and the requirement is -80 dB/sub c/ for each line. ADC requires 12 to 14 b. The high-frequency mode is the most promising for detecting targets with very low radar cross sections in head-on configuration (free clutter domain).
机译：研究了对多用途机载雷达的激励器收发器单元施加的地物杂波抑制要求。给出了确定单元特性的方法，例如在高和中脉冲重复频率工作模式下的噪声，杂散谱线电平和模数转换器（ADC）动态。结果表明，频谱噪声既不依赖于波形也不依赖于多普勒带宽。参考振荡器的频谱噪声必须约为-155 dB / sub c // Hz。杂散线的电平通常仅取决于占空比，每条线的要求为-80 dB / sub c /。 ADC需要12到14 b。高频模式对于以正面配置（自由杂波域）检测雷达横截面非常低的目标是最有前途的。

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