Design criteria for loop filters in spectrum balancing technique-based adaptive equalisers

Equalisation is mandatory in modern high-speed communications systems; among the different techniques proposed in the literature, adaptive equalisation at the receiver based on the power spectrum balancing technique is the preferred solution because of its capability to take into account the varying channel characteristics and its low power requirements. This paper presents an overview of the different structure that are used in the literature, establishing measureable design criteria for the filters based on the characteristics of the channel and the equalizer filter.