THEORETICAL-ANALYSIS FOR THE NONLINEAR FREQUENCY-SELECTIVE JOINT-TRANSFORM CORRELATOR

The theoretical analysis for a nonlinear and bipolar frequency-selecti ve joint-transform correlator is reported without any impractical assu mptions and verified. The theoretical results are similar to those for a nonlinear and bipolar joint-transform correlator. In addition, the optimal threshold value for a bipolar frequency-selective joint-transf orm correlator is found to be zero. Moreover, a bipolar frequency-sele ctive joint-transform correlator can provide a phase-only correlation signal with delta-function shape. The theoretical study for a DC-block bipolar frequency-selective joint-transform correlator is also given. It is shown that its autocorrelation peak remains the same as that wi thout a DC block.