Iir filter dc offset

1. Will high pass filter remove DC offset?
2. What is DC offset in signal processing?
3. How can DC offset be avoided?

Will high pass filter remove DC offset?

This DC offset is due to the local oscillator leakage in the base band. The high pass filter can be used. DC means zero frequency so we can remove it with using high pass filter.

What is DC offset in signal processing?

In signal processing, when describing a periodic function in the time domain, the DC bias, DC component, DC offset, or DC coefficient is the mean amplitude of the waveform. If the mean amplitude is zero, there is no DC bias. A waveform with no DC bias is known as a DC balanced or DC free waveform.

How can DC offset be avoided?

In almost all cases, a frequency (hum or spike) near 0 Hz causes DC offset. So, using a high-pass filter anywhere from 1 Hz to 20 Hz should get rid of DC offset. I suggest setting the high-pass filter at 10 Hz, which should be low enough not to cause sonic changes and high enough to filter out DC offset.