Fast-Time and Slow-Time Space-Time Adaptive Processing for bistatic radar interference suppression

In bistatic radar with transmitter and receiver geographically separated the interference from ground clutter and the direct path signal transmitter - receiver will be strong and must be suppressed in order to detect the target. We apply FT-STAP (Fast-Time Space Time Adaptive Processing) to the suppression, which is unusual, and compare with conventional ST-STAP (Slow-Time STAP) by simulations in order to see whether FT-STAP is an alternative to ST-STAP. The performance of FT-STAP is much worse than of ST-STAP. We give an explanation for this, which also may be the basis for large improvements of FT-STAP. Moreover, we suggest two new performance measures.