System and method for controlling gain and timing phase in a presence of a first least mean square filter using a second adaptive filter

摘要

A communication system includes a variable gain amplifier (VGA) that receives an input signal. An analog-to-digital converter (ADC) receives an output of the VGA. A first filter responsive to an output of the ADC, the first filter includes N tap weight coefficients. A first least mean square (LMS) engine updates the N tap weight coefficients of the first filter. A second filter responsive to an output of the first filter, the second filter including M tap weight coefficients, wherein N is greater than M. An adaptation engine updates a first tap weight coefficient of the second filter based on a value of the first tap weight coefficient for a next sampling time of the input signal, a value of the first tap weight coefficient for a current sampling time of the input signal, a first gain constant, and a change in timing phase error of the first filter.