A NOVEL TECHNIQUE FOR INITIALIZING DIGITAL IIR FILTERS WITH A FINITE NUMBER OF SAMPLES AT A SINGLE-FREQUENCY

This brief deals with a new initialization technique for digital IIR f ilters. The technique is suitable for IIR filters processing a finite number of samples in phased array radars. The initialization processor is complex one and utilized the first received sample to force the fi lter to reach its steady-state value at a single frequency irrespectiv e of the number of processed samples, This is done by initially loadin g the internal memories of the filter with their steady-state values. If the filter has a zero steady-state response at that particular freq uency then this will ensure that the transient frequency responses of the filter will also have a zero response at that frequency, Different processors are derived for filters with real and complex coefficients .