Bandwidth techniques for digital recursive filters used in step scan radars
Hussain Al-Ahmad, Gordon B. Lockhart · International Journal of Electronics · 1992
New bandwidth analysis techniques for digital recursive filters used in phased array step scan radars are presented. The analysis is applicable to filters processing a finite number of samples with or without initialization. The techniques include the calculation of the usable and the 3 dB bandwidths. The bandwidth techniques are used to study the effect of processing a limited number of samples and initialization of the pass-band of conventional filters. They are also used to evaluate the pass-band of recursive filters with optimum clutter rejection. Such techniques are applied to simplify the design of a first-order filter which uses initialization and maximizes the usable bandwidth.