o_195h4n6al16jb186b1b2qs7fgssa.pdf

(of the same dimension) whose element values are not necessarily constrained
to the
discrete fractional set {-1, ..., 1-2
-15
}. Thus, no matrix inversion operation is provided for
fractional matrices.
However, since matrix inversion is a veryuseful operation, an implementation
based
on floating point number representation and arithmetic is provided within the
DSP
Library. Its description follows.
MatrixInvert
Description: MatrixInvertcomputes the inverse of the source matrix, and places
the result in the destination matrix.
Include: dsp.h
Prototype: extern float* MatrixInvert (
int numRowsCols,
float* dstM,
float* srcM,
float* pivotFlag,
int* swappedRows,
int* swappedCols
);
Arguments: numRowCols number of rows and columns in (square) source
matrix
dstM pointer to destination matrix
srcM pointer to source matrix
Required for internal use:
pivotFlag pointer to a length numRowsCols vector
swappedRows pointer to a length numRowsCols vector
swappedCols pointer to a length numRowsCols vector
Return Value: Pointer to base address of destination matrix, or NULLif source
matrix
is singular.
Remarks: Even though the vectors pivotFlag, swappedRows, and
swappedCols, are for internal use only, they must be allocated prior to
calling this function.
If source matrix is singular (determinant equal to zero) the matrix does
not have an inverse. In this case the function returns NULL.
This function can be computed in place.
Source File: minv.asm(assembled from C-code)
Phần này trình bày các khái niệm về một bộ lọc phân đoạn, như xem xét bởi
DSP
Thư viện, và mô tả các chức năng cá nhân đó thực hiện các hoạt động lọc.
2.6.1 Hoạt động lọc Fractional
Lọc các chuỗi dữ liệu được đại diện bởi phân đoạn vector x [n] (0 ≤n