Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

To solve the speckle effect problem in heterodyne detection, an array detector is proposed; heterodyne efficiency is modeled by accounting for speckle and using an additional parameter to simulate coherent summation processing. Heterodyne efficiency is derived by mixing a Monte Carlo simulated speckle field with a planar local oscillator field on a photodetector surface to evaluate the array detector performance at improving signalto-noise ratio (SNR) of the coherent optical system. From the simulation results, the array detector is shown to effectively improve the SNR of the heterodyne system. For low SNR, the heterodyne efficiency of an N × N array detector increases linearly with N.

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Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

Cited by 5 publications

References 12 publications

The quantitative relationship between the target surface speckle phase echo parameters and heterodyne efficiency

The quantitative relationship between the target surface speckle phase echo parameters and heterodyne efficiency

Compensation for target speckle phase by use of the combination of the adaptive particle swarm optimization algorithm and the array detector method in heterodyne detection

Modeling the Heterodyne Efficiency of Array Detector Systems in the Presence of Target Speckle

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