Judging by the C code for the final lab in my DSP class, one should use 205 bins when using the discrete Fourier transform to demodulate this system because then the frequency centers of the bins 3 are most closely aligned to this system. Also, a very useful and popular DFT algorithm for use with this system is the Goertzel algorithm. This system is represented by a 4 x 4 matrix whose rows are (*) 697, 770, 852 and 941 Hz and whose columns are 1209, 1336, 1477, and 1633 Hz. For 10 points, name 6 this system in which numbers and symbols are encoded as a combination of a low and high frequency, fortransmission over a te
Judging by the C code for the final lab in my DSP class, one should use 205 bins when using the discrete Fourier transform to demodulate this system because then the frequency centers of the bins 3 are most closely aligned to this system. Also, a very useful and popular DFT algorithm for use with this system is the Goertzel algorithm. This system is represented by a 4 x 4 matrix whose rows are (*) 697, 770, 852 and 941 Hz and whose columns are 1209, 1336, 1477, and 1633 Hz. For 10 points, name 6 this system in which numbers and symbols are encoded as a combination of a low and high frequency, fortransmission over a telephone network.
Judging by the C code for the final lab in my DSP class, one should use 205 bins when using the discrete Fourier transform to demodulate this system because then the frequency centers of the bins 3 are most closely aligned to this system.
DTMF [or: dual-tone multi-frequency signaling]