Proceedings PaperPerformance of the binary nonlinear joint transform correlators with nonuniform Fourier plane quantization
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It has been shown previously that the binary joint transform correlator (JTC) can produce reasonably good correlation performance.'5 The binary JTC uses nonlinearity at the Fourier plane to binarize the Fourier transform interference intensity to only two values, +1 and -1. The binarization is performed according to a predetermined threshold value which is the median of the joint power spectrum histogram. The performance of the binary JTC was compared to that of the classic JTC in the areas of light efficiency, correlation peak to sidelobe ratio, correlation width, and cross-correlation sensitivity. It was shown that compared with the classical correlator, the binary joint transform correlator provides significantly higher peak intensity, larger peak to sidelobe ratio, narrower correlation width, and better cross-correlation sensitivity.