Long term stability in fractionally-space adaptive equalizers

This paper presents a new adaptive algorithm for the long term stable operation of a digitally implemented fractionally-spaced adaptive equalizer. We show how previously reported solutions may become useless working with a too small word size. Then, we propose an alternative based on performing an equalizer tap weight normalization after each new adaption. Thus, we simultaneously prevent register overflows an avoid the SNR degradation when applying the previous algorithms.