Linear FM-CW Laser Radar: Analysis and Experimental Results

E. R. Washwell

doi:10.1117/12.950683

23 February 1985 Linear FM-CW Laser Radar: Analysis and Experimental Results

E. R. Washwell

Author Affiliations +

Proceedings Volume 0572, Infrared Technology XI; (1985) https://doi.org/10.1117/12.950683
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

Nonlinearity in the frequency modulation of the transmitted pulse of a homodyne linear-FM radar will degrade performance. Analysis and computer simulation were performed which provide quantitative results of the effects of nonlinearity on resolution and signal levels obtained from returns from point targets. The anlaysis is based on the expansion of the phase modulation of an individual transmit pulse in a power series in time. Input quantities to the model include magnitudes of non-linearity coefficients, radar parameters, range to target. Experimental data obtained with a laser radar was analyzed and the measured deviation of the frequency modulation from linearity used to predict performance at arbitrary target ranges. Statistical studies of the experimental data yielded information on the consistency of the nonlinearity. Range images obtained with the system are presented which show better than 1 m single-look range resolution.

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E. R. Washwell "Linear FM-CW Laser Radar: Analysis and Experimental Results", Proc. SPIE 0572, Infrared Technology XI, (23 February 1985); https://doi.org/10.1117/12.950683

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