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

% create tone burst
x = toneBurst(10e6, 0.5e6, 10);

% plot tone burst and envelope
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