DSP Blockset

Example: Importing a Frame-Based Signal.   In the model below, the Signal From Workspace block creates a three-channel frame-based signal with the following data:

• Channel 1: 1, 2, 3, 4, 5,..., 100, 0, 0, 0,...
• Channel 2: -1, -2, -3, -4, -5,..., -100, 0, 0, 0,...
• Channel 3: 5, 5, 5, 5, 5,..., 0, 0, 0,...

The frame size is four samples.

To create the model, define the following variables at the MATLAB command line.

• A = [1:100;-1:-1:-100]';          % 100-by-2 matrix
  B = 5*ones(100,1);                % 100-by-1 column vector
  

Matrix A represents a two-channel signal with 100 samples, and matrix B represents a one-channel signal with 100 samples.

Specify the following parameter values in the Signal From Workspace block:

• Signal = [A B]
• Sample time = 1
• Samples per frame = 4
• Form output after final data value = Setting to zero

The Signal expression [A B] uses the standard MATLAB syntax for horizontally concatenating matrices and appends column vector B to the right of matrix A. Equivalently, you could set Signal = C, and define C at the command line by

• C = [A B]
  

The Sample time setting of 1 and Samples per frame setting of 4 yield a frame-based output with sample period of 1 second and frame period of 4 seconds. The Form output after final data value parameter setting specifies that all samples after the hundredth are zero.

Importing a Frame-Based Signal with the Signal From Workspace Block

Importing WAV Files