| Signal Processing Toolbox | |
Construct a discrete-time, state-space filter object
Syntax
Description
Hd = dfilt.statespace(A,B,C,D)
returns a discrete-time state-space filter object, Hd, with rectangular arrays A, B, C and D.
A, B, C, and D are from the matrix or state-space form of a filter's difference equations
where x(n) is the vector states at time n, u(n) is the input at time n, y is the output at time n, A is the state-transition matrix, B is the input-to-state transmission matrix, C is the state-to-output transmission matrix, and D is the input-to-ouput transmission matrix. For single-channel systems, A is an m-by-m matrix where m is the order of the filter, B is a column vector, C is a row vector, and D is a scalar.
Hd = dfilt.statespace
returns a default, discrete-time state-space filter object, Hd, with A=[ ], B=[ ], C=[ ], and D=1. This filter passes the input through to the output unchanged.
Examples
Specify a second-order, state-space filter structure for a dfilt object, Hd, with the following code:
[A,B,C,D] = butter(2,0.5); Hd = dfilt.statespace(A,B,C,D) Hd = FilterStructure: 'Statespace' A: [2x2 double] B: [2x1 double] C: [0.2071 0.5000] D: 0.2929 get(Hd,'A') ans = -0.4142 -0.5858 0.5858 0.4142 get(Hd,'B') ans = 0.8284 0.8284
See Also
| | dfilt.scalar | dftmtx | |
