How to detect dialed signals dtmf

Hello,

If given Fs(sampling frequency) and t(period for each signal), How can I detect the dialed numbers in a dtmf signal using fft.

Thanks.

Answer 1

[Wayne King]

Have you seen this example?

https://www.mathworks.com/help/signal/examples/dual-tone-multi-frequency-dtmf-signal-detection.html

[kyin gab]

seen it many times. I am a beginner and honestly, MatLab did not help matters there.

Thank you.

[Walter Roberson]

It appears the above moved. One Simulink based example is now at https://www.mathworks.com/help/dsp/examples/dtmf-generator-and-receiver.html