Adaptive equalizer with a dual-mode active taps mask generator and a pilot reference signal amplitude control unit

A method for adaptive equalization comprising:

• an equalizer filter outputting a masked equalizer signal and an unmasked equalizer signal using equalizer filter tap coefficients;
• selecting one of the masked or unmasked equalizer signals;
• based on the selected equalizer signal, generating an error signal that is used for updating the equalizer filter tap coefficients used by the equalizer filter;
• providing an active taps mask for the equalizer filter that is dependent on which equalizer signal is selected to generate the error signal;
• a pilot amplitude reference unit generating a reference amplitude signal used to adjust an output power;
• generating a pilot reference signal by multiplying the reference amplitude signal with a scaled pilot channelization code signal;
• and
• generating the error signal by subtracting the selected equalizer signal from the pilot reference signal.

A method for adaptive equalization comprising:

• an equalizer filter outputting a masked equalizer signal and an unmasked equalizer signal using equalizer filter tap coefficients;
• selecting one of the masked or unmasked equalizer signals;
• based on the selected equalizer signal and a reference amplitude signal, generating an error signal that is used for updating equalizer filter tap coefficients used by the equalizer filter;
• providing an active taps mask for the equalizer filter that is dependent on which equalizer signal is selected to generate the error signal;
• measuring a power of the masked equalizer signal;
• generating an equalizer output power signal based on the power of the masked equalizer signal;
• dividing a power target measurement signal by the value of the equalizer output power signal to generate a quotient result measurement signal wherein the reference amplitude signal is based on the quotient result measurement signal;
• outputting an equalizer tapped delay line (TDL) signal from the equalizer filter;
• and
• descrambling the equalizer TDL signal.