TAP UPDATE CONTROL DEVICE CAPABLE OF IMPROVING CHANNEL ESTIMATION PERFORMANCE BASED ON THE PREDICTED NOISE LEVEL OF A SYMBOL WHICH IS USED IN OPTICAL COMMUNICATION

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.;COPYRIGHT KIPO 2012