BLIND SELF-ADAPTIVE FILTERING METHOD, APPARATUS AND BROADBAND TRANSMISSION SYSTEM FOR ELIMINATING NARROWBAND INTERFERENCE

摘要

A blind self-adaptive filtering method, an apparatus and a broadband transmission system for eliminating narrowband interference are provided. The self-adaptive filtering apparatus includes: a self-adaptive filter, for filtering the current input signal and then outputting it, a first delay unit, for delaying the signal output from the self-adaptive filter with a first time delay length, and an error calculation unit, for implementing correlation operation on the signal output from the self-adaptive filter and the delay signal of the output signal to obtain error information. The self-adaptive filter adjusts the filter parameter according to the feedback error information to eliminate the interference in the latter input signal. As applying the output signal to implement correlation operation with the delay signal of the output signal, thus, the apparatus is used widely, for example, it can be applicable to broadband receiver, it also can be applicable to the case that there are a plurality of strong narrowband interferences, and it also can counteract a plurality of strong narrowband interferences whose swept rate is decades of milliseconds.