Formula Of Sampling Frequency. 12 Hz sinewave and would therefore require greater than 24 Hz sampling rate to preserve the correct frequency in reconstruction. The formula for the frequency of a wave is used to find frequency f time period.
2B Fs 2B Fs 2B. N f H f H f L n 25 so n 2 maximum Now 2 f H n f s 25 f s so minimum sampling rate will be 25 k H z. A signal at frequency f such that f sample 2 f.
F sample will alias to f f sample - f hence a 20KHz sine wave sampled at 30KHz will appear as a 10KHz sine wave.
The sampling frequency should be at least double the maximum frequency. So I need to use the Baseband sampling. In the figure below you see the sampling effects on a sinusoidalsignal of frequency B Hz that result from the use of different samplingfrequencies. Sampling units which may be difficult to obtain in emergency situations.
