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envelopeDetection

Extract signal envelope using the Hilbert Transform

Syntax

env = envelopeDetection(x)

Description

envelopeDetection applies the Hilbert transform to extract the envelope from an input vector x. If x is a matrix, the envelope along each row is returned. For example, running the code

x = toneBurst(10e6, 0.5e6, 10);
figure;
plot(0:length(x)-1, x, 'k-', 0:length(x)-1, envelopeDetection(x), 'r-');
legend('Input Signal', 'Envelope');

produces the output

Inputs

x

input function

Outputs

env

envelope of input function

See Also

fft


© 2009-2014 Bradley Treeby and Ben Cox.