identify_id.m

用matlab仿真电话的通信。DTMF仿真

function[row,col]=identify_ID(x)
frequency_LL=[697 770 852 941];
frequency_HH=[1209 1336 1477 1633];
switch x
    case '1'
        row=frequency_LL(1);
        col=frequency_HH(1);
    case '2'
        row=frequency_LL(1);
        col=frequency_HH(2);
    case '3'
        row=frequency_LL(1);
        col=frequency_HH(3);
    case 'a'
        row=frequency_LL(1);
        col=frequency_HH(4);
    case '4'
        row=frequency_LL(2);
        col=frequency_HH(1);
    case '5'
        row=frequency_LL(2);
        col=frequency_HH(2);
    case '6'
        row=frequency_LL(2);
        col=frequency_HH(3);
    case 'b'
        row=frequency_LL(2);
        col=frequency_HH(4);
    case '7'
        row=frequency_LL(3);
        col=frequency_HH(1);
    case '8'
        row=frequency_LL(3);
        col=frequency_HH(2);
    case '9'
        row=frequency_LL(3);
        col=frequency_HH(3);
    case 'c'
        row=frequency_LL(3);
        col=frequency_HH(4);
    case '*'
        row=frequency_LL(4);
        col=frequency_HH(1);
    case '0'
        row=frequency_LL(4);
        col=frequency_HH(2);
    case '#'
        row=frequency_LL(4);
        col=frequency_HH(3);
    case 'd'
        row=frequency_LL(4);
        col=frequency_HH(4);
end