Delay compensation in equalizer-based receiver

A method of processing one or more received signals, the method comprising:

• generating, based on a receiver input signal, an equalizer delay value, a demodulator delay value, and a demapper delay value;
• receiving an equalizer input signal and generating from the equalizer input signal one or more processing parameters;
• calculating a processing delay associated with the generation of the one or more processing parameters from the equalizer input signal;
• generating a delayed version of the equalizer input signal based on the equalizer delay value, wherein the equalizer delay value is selected based on the calculated processing delay associated with the generation of the one or more processing parameters from the equalizer input signal;
• applying the one or more processing parameters to the delayed version of the equalizer input signal to generate an equalizer output signal;
• generating from the equalizer output signal one or more processing parameters;
• calculating a processing delay associated with the generation of the one or more processing parameters from the equalizer output signal;
• generating a delayed version of an intermediate signal based on the equalizer output signal and the demodulator delay value, wherein the demodulator delay value is selected based on the calculated processing delay associated with the generation of the one or more processing parameters from the equalizer output signal;
• applying the one or more processing parameters to the delayed version of the intermediate signal to generate a demodulator output signal;
• generating from the demodulator output signal one or more processing parameters;
• calculating a processing delay associated with the generation of the one or more processing parameters from the demodulator output signal;
• generating a delayed version of the demodulator output signal based on the demapper delay value, wherein the demapper delay value is selected based on the calculated processing delay associated with the generation of the one or more processing parameters from the demodulator output signal;
• and
• applying the one or more processing parameters to the delayed version of the demodulator output signal to generate a demapper output signal;
• wherein each of the delayed signal versions compensates for a processing delay associated with the generation of the respective one or more processing parameters.

A multi-stage receiver having a sequence of processing stages, the multi-stage receiver comprising:

• (i) a delay controller adapted to generate, from a receiver input signal, an equalizer delay value, a demodulator delay value, and a demapper delay value;
• (ii) an equalizer stage comprising:
• a first processing block adapted to receive an equalizer input signal and generate from the equalizer input signal one or more processing parameters;
• an equalizer delay block adapted to generate a delayed version of the equalizer input signal based on the equalizer delay value;
• and
• a second processing block adapted to apply the one or more processing parameters to the delayed version of the equalizer input signal to generate an equalizer output signal;
• (iii) a demodulator stage comprising:
• a first processing block adapted to receive the equalizer output signal and generate from the equalizer output signal one or more processing parameters;
• a demodulator delay block adapted to generate a delayed version of an intermediate signal based on the equalizer output signal and the demodulator delay value;
• and
• a second processing block adapted to apply the one or more processing parameters to the delayed version of the intermediate signal to generate a demodulator output signal;
• and
• (iv) a demapper stage comprising:
• a first processing block adapted to receive the demodulator output signal and generate from the demodulator output signal one or more processing parameters;
• a demapper delay block adapted to generate a delayed version of the demapper input signal based on the demapper delay value;
• and
• a second processing block adapted to apply the one or more processing parameters to the delayed version of the demapper input signal to generate a demapper output signal;
• wherein:
• each of the delay blocks compensates for processing delays associated with the generation of the one or more processing parameters by the respective first processing block;
• and
• the delay controller is adapted to select the delay value for each delay block by calculating a processing delay associated with the generation of the one or more processing parameters by the respective processing block.

A receiver-implemented method of processing one or more received signals, the method comprising:

• (a) the receiver receiving an input signal and generating from the input signal one or more processing parameters;
• (b) the receiver calculating a processing delay associated with the generation of the one or more processing parameters;
• (c) the receiver generating a delay value based on either the input signal or a processed version of the input signal;
• (d) the receiver generating a delayed signal from an original signal based on the delay value;
• and
• (e) the receiver applying the one or more processing parameters to the delayed signal to generate an output signal;
• wherein:
• the generation of the delayed signal compensates for processing delays associated with the generation of the one or more processing parameters;
• and
• the delay value is selected based on the calculated processing delay.