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Methods and apparatus for rejecting returns from negative doppler shift swath in an airborne pulse radar
Methods and apparatus for rejecting returns from negative doppler shift swath in an airborne pulse radar
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机译:在机载脉冲雷达中抑制负多普勒频移带返回的方法和装置
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摘要
An in-phase/quadrature component (IQ) mixer is configured to reject returns from a negative doppler shift swath in order to mitigate corruption of returns of a positive doppler shift swath. The mixer includes a sample delay element which produces a quadrature component from the in-phase component of an input signal. Further included are a plurality of mixer elements, a plurality of low pass filters, a plurality of decimators, and a plurality of all pass filters which act upon both the in-phase and quadrature components of the input signal. Also, a subtraction element is included which is configured to subtract the filtered and down sampled quadrature component from the filtered and down sampled in-phase component.
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