Signal Processing Toolbox

Common Sequences: Unit Impulse, Unit Step, and Unit Ramp

Since MATLAB is a programming language, an endless variety of different signals is possible. Here are some statements that generate several commonly used sequences, including the unit impulse, unit step, and unit ramp functions:

• t = (0:0.001:1)';
  y = [1; zeros(99,1)];  % impulse
  y = ones(100,1);       % step (filter assumes 0 initial cond.)
  y = t;                 % ramp
  y = t.^2;
  y = square(4*t);
  

All of these sequences are column vectors. The last three inherit their shapes from t.

Waveform Generation: Time Vectors and Sinusoids

Multichannel Signals

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