Expectation values in the frequency domain are used to calculate the correlation peak of an optical matched filter. These calculations show that the phase-only and classical matched filters are equally sensitive to scale changes when modest high-pass filtering is used. Computer simulations were done for verification.
Christopher S. Anderson,
Roland C. Anderson,
"Comparison Of Phase-Only And Classical Matched Filter Scale Sensitivity," Optical Engineering 26(3), 263276 (1 March 1987). https://doi.org/10.1117/12.7974062