Part A can be found here: https://www.chegg.com/homework-help/questions-and-answ

Question

Part A can be found here: https://www.chegg.com/homework-help/questions-and-answers/51-project-concept-dual-tone-multi-frequency-dtmf-signaling-explored-name-implies-dtmf-sig-q27050121

Please help with part B, thanks! (please type instead of hand-writing code)

51. In this project the concept of dual-tone multi-frequency (DTMF) signaling will be explored. As the name implies, DTMF signals are mixtures of two sinusoids at distinet ncies. They are used in communications over analog telephone lines. A particular n of DTMF signaling is utilized in dialing a number with push-button telephone versio handsets, a scheme known as touch tone dialing. When the caller dials a number, the DTMF generator produces a dual-tone signal for each digit dialed. The synthesized signal is in the form (t)-sin (2tht) + sin (2tht), 0

Explanation / Answer

da(t)=sin((2*pi)*(770)*t)+sin ((2*pi)*(1209)*t)

d5(t)=sin((2*pi)(770)*t)+sin((2*pi)*(1336)*t)

d8(t)=sin((2*pi)(852)*t)+sin((2*pi)(1336)*t)

d9(t)=sin((2*pi)(852)*t)+sin((2*pi)(1477)*t)

MATLAB header file

function num=classify(X,Fs)

% of your code here

num=output;

end

% code for TF matrix generation

TF=[941,1336;

697;1209;

697;1336;

697;1477;

770;1209;

770;1336;

770;1477;

852;1209;

852;1336;

852;1477;];

TF% call matrix and display in command window

%code for total -error

total-error=zeros(10,1); % column vector of 10 zeros

%code for for-loop through all rows in column vector

total -error

error-sum=0;%sum of error started here

for(i=1); length (total-error)

error-sum=error-sum+total-error(i,1)%

error sum started here

error=total-error(i);%error value started

here

end

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