# Tag Info

### How to minimize RMS calculation error due to sampling?

Here are some more ideas. If your frequency is not drifting to much you can easily choose a better frame size. In your example you get and error of about -60dB for a frame size of 320 or 321. The &...
1 vote

### How to minimize RMS calculation error due to sampling?

There's many ways to approach this, but the classical "estimation of power in a system having data on harmonic oscillations" would be too just apply a quadrature mixture to baseband to it ...
Accepted

### Sampling a sinusoidal signal smaller than Nyquist rate

As per the suggestion by @Dan Boschen, I am converting my comments into a short answer. For simplicity, ignore units, so the 50 kHz signal frequency becomes 50, the 7 kHz sampling frequency becomes 7 ...
You're experiencing a basic property of the DFT of a real input signal, that it is conjugate symmetric: Let $x[n], \, n = 0\cdots N-1$ be a real-valued sequence, then the DFT coefficients are ...