This letter addresses the impact of limited oscillator stability in bistatic and multistatic synthetic aperture radars (SARs). Oscillator noise deserves special attention in distributed SAR systems since there is no cancellation of low-frequency phase errors as in a monostatic SAR, where the same oscillator signal is used for modulation and demodulation. It is shown that the uncompensated phase noise may cause a time-variant shift, spurious sidelobes, and a broadening of the impulse response, as well as a low-frequency phase modulation of the focused SAR signal. Quantitative estimates are derived analytically for each of these errors based on a system-theoretic model taking into account the second-order statistics of the oscillator phase noise.


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    Title :

    Impact of Oscillator Noise in Bistatic and Multistatic SAR


    Contributors:

    Published in:

    Publication date :

    2006-07-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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