APPARATUS FOR CONTROLLING TAP UPDATE

摘要

PURPOSE: A tap update control device is provided to improve noise level estimation performance by restricting the number of tap update times using simple structure. CONSTITUTION: A feed forward filter(100) filters inputted signal. The feed forward filter outputs the filtered signal to a first adder(120). A feedback filter filters the signal outputted from a decision unit(130). The feedback filter outputs the filtered signal to the first adder. The first adder adds the inputted signals. The decision unit determines the symbol based on the inputted signals.