Throughput comparison of optical and digital correlators for automatic target recognition

Chao H. Huang; Gregory O. Gheen; Edward R. Washwell

doi:10.1117/12.49730

1 November 1991 Throughput comparison of optical and digital correlators for automatic target recognition

Chao H. Huang, Gregory O. Gheen, Edward R. Washwell

Proceedings Volume 1564, Optical Information Processing Systems and Architectures III; (1991) https://doi.org/10.1117/12.49730
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Correlation provides an effective approach for recognizing targets embedded in a large field of view containing noise and clutter. Correlation is implemented either digitally or optically. When implemented digitally, correlation (consisting ofrepetitive multiply and accumulation operations) is directly realized with digital multipliers and accumulators (MAC), specialized signal processors or general computers. When the input record length is long, digital correlation is implemented in the frequency domain. Fast correlation is achieved because of the existence of the computational efficient fast Fourier transform (FFT) algorithm and specialized hardware for the discrete Fourier transform (DFT).

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Chao H. Huang, Gregory O. Gheen, and Edward R. Washwell "Throughput comparison of optical and digital correlators for automatic target recognition", Proc. SPIE 1564, Optical Information Processing Systems and Architectures III, (1 November 1991); https://doi.org/10.1117/12.49730

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