As for how much the Q value is set, it depends on the actual situation. Generally, the default value is used, and the notch whistling point can use a larger q value.

Equalizer type:

The filter inserted in the baseband or intermediate frequency part of the communication system can reduce the inter-symbol interference and play a compensation role. Divided into frequency domain equalizer and time domain equalizer.

Frequency domain equalizer.

Frequency domain equalizer uses the frequency characteristics of tunable filter to compensate the amplitude-frequency characteristics and group delay characteristics of the actual channel, so that the total frequency characteristics of the whole system including equalizer can meet the transmission conditions without intersymbol interference.

Time domain equalizer.

The time domain equalizer directly considers the time response, so that the impulse response of the whole transmission system including the equalizer meets the condition of no inter-symbol interference. Frequency domain equalization meets the requirements of Nyquist shaping theorem, and the condition of no intersymbol interference is relatively loose only at the decision point. Therefore, time domain equalizer is widely used in digital communication.