FILTER COEFFICIENT EVALUATING METHOD FOR GHOST CANCELLING

摘要

averaging received reference signals several times; obtaining the maximum change amount of the filter coefficient by comparing the (t)-th filter coefficient with the (t+1)-th filter coefficient; calculating the threshold value to renew the filter coefficient in the (t+1)-th calculation process by using the maximum change amount and the interface value; setting the filtered coefficient as zero in case that it is smaller than an added threshold value; renewing the filter coefficient value if the change amount of the filter coefficient is larger than the threshold value, and otherwise, replacing it with the former filter coefficient value, in case that the filter coefficient value is larger than the added threshold value; and performing a filtering as to the input signal with the calculated filter coefficient in case that the renewal number is above N.