DSP Blockset

Example: Importing a Sample-Based Matrix Signal.   In the model below, the Signal From Workspace imports a four-channel sample-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: 0, 0, 0, 0, 0,...
• Channel 4: 5, 5, 5,..., 0, 0, 0,...

  

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

• sig1 = reshape(1:100,[1 1 100])   % 1-by-1-by-100 array
  sig2 = reshape(-1:-1:-100,[1 1 100])% 1-by-1-by-100 array
  sig3 = zeros(1,1,100)             % 1-by-1-by-100 array
  sig4 = 5*ones(1,1,100)            % 1-by-1-by-100 array
  sig12 = cat(2,sig1,sig2)          % 1-by-2-by-100 array
  sig34 = cat(2,sig3,sig4)          % 1-by-2-by-100 array
  A = cat(1,sig12,sig34)            % 2-by-2-by-100 array
  

Array A represents a 4-channel signal with 100 samples.

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

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

The Sample time and Samples per frame settings of 1 yield a sample-based output with sample period of 1 second. Each of the four elements in the matrix represents an independent channel. The Form output after final data value parameter setting specifies that all outputs after the one-hundredth are zero.

These two sections may also be of interest to you:

• Creating Signals Using the Signal From Workspace Block
• Constructing Multichannel Sample-Based Signals

Importing a Sample-Based Matrix Signal

Importing a Multichannel Frame-Based Signal