ERROR SPECTRUM SHAPING IN 2D STATE-SPACE DIGITAL-FILTERS USING ERROR DIAGONAL FEEDBACK

This paper discusses error spectrum shaping for 2D state-space digital filters. In order to reduce cost by reducing the total number of para meters, a method of analytic design is proposed in which the error fee dback coefficient is specified by a diagonal matrix. The proposed algo rithm has the feature that the optimal error feedback coefficient can be designed analytically in closed form by minimizing a quadratic form . The validity of the proposed algorithm is demonstrated with a numeri cal example. The noise reduction effect where the subdecimal part of t he optimal coefficient is rounded by the power of 2 is also demonstrat ed. (C) 1998 Scripta Technica.