Sampled analog recursive comb filters and their application to MTI- radar.
Lars Terje Saetre · Defense Technical Information Center (DTIC) · 1975
The design of second order sampled analog filters using Z-transform techniques developed in digital theory was studied. A second order recursive CTD- filter was implemented and investigated. Deviation from theoretical frequency response was found to be partly due to frequency dependent circuitry. MTI- simulation was performed, and the ability of the CTD-filter to cancel clutter and pass doppler frequencies was demonstrated. Unexplained glitches in the filter output were noted.