DSP Blockset

Exporting a Frame-Based Signal
Using the To Workspace Block

Recall that a frame-based signal with N channels and frame size M is represented by a sequence of M-by-N matrices. (The special case of N = 1 represents a single-channel signal.) When the input to the To Workspace block is a frame-based signal (and the Save format parameter is set to Array), the block creates an P-by-N array in the MATLAB workspace containing the P most recent samples from each channel. The number of rows, P, is specified by the Limit data points to last parameter. The newest samples are added at the bottom of the matrix.

The figure below illustrates this for three consecutive frames of a frame-based signal (two samples per frame) exported to matrix A.

The workspace matrix always has time running along its first (P) dimension. Samples are saved along the P dimension whether the input is a matrix, vector, or scalar (single channel).

The following example illustrates how the To Workspace block can be used to export a frame-based multichannel signal to the MATLAB workspace.

Example: Exporting a Sample-Based Matrix Signal

Example: Exporting a Frame-Based Signal