The effects of binarization of the input and the reference data in a correlator with the amplitude-compensated matched filter have been investigated. Computer simulations show that with binarization the noise tolerance of the correlator shows a significant improvement without compromising the other performance merits of the spatial filter. This is critical in the application of the amplitude-compensated matched filter, since the energy absorption of this type of filter severely reduces the input noise tolerance.
Wang, Z. Q., Cartwright, C. M., Gillespie, W. A., & Soutar, C. (1992). Binarization effects in a correlator with an amplitude-compensated matched filter. Optics Communications, 92(1-3), 19-22. https://doi.org/10.1016/0030-4018(92)90211-9