Impulse noise mitigation under out-of-band interference conditions

摘要

An impulse noise mitigation circuit (INMC) may set a cut-off frequency of each of two high pass filters to bound a frequency bandwidth of a desired signal, wherein a first of the two filters allows frequencies higher than the frequency bandwidth of the desired signal, and a second of the two filters allows frequencies lower than the frequency bandwidth of the desired signal. The INMC may compute and store a mean magnitude separately for a first signal response of the first filter and a second signal response of the second filter. The INMC may select the first filter for impulse noise mitigation when the mean magnitude of the second filter is greater than the mean magnitude of the first filter. The INMC may select the second filter for impulse noise mitigation when the mean magnitude of the first filter is greater than the second filter.

主权项

1. A method for impulse noise mitigation, comprising:
setting a cut-off frequency of each of a first high pass filter and a second high pass filter to bound a frequency bandwidth of a desired signal, wherein: the first high pass filter allows frequencies higher than the frequency bandwidth of the desired signal; and the second high pass filter allows frequencies lower than the frequency bandwidth of the desired signal; determining a mean magnitude for a first signal response of the first high pass filter and for a second signal response of the second high pass filter; selecting the first high pass filter for impulse noise mitigation when the mean magnitude for the second signal response of the second high pass filter is greater than the mean magnitude for the first signal response of the first high pass filter; and selecting the second high pass filter for impulse noise mitigation when the mean magnitude for the first signal response of the first high pass filter is greater than the mean magnitude for the second signal response of the second high pass filter.