Generalised transversal equalisation for high-capacity digital transmission

A novel adaptive equalizer structure based on a generalization of conventional transversal filters is proposed. A combination of continuous-time filtering and digital adaptation is used to achieve improved error rates and faster equalizer convergence for high-speed digital transmission over channels whose transmission characteristics are known approximately. The proposed structure can be designed to equalize exactly the expected degree of distortion introduced by the channel for any specified number of traps and hence does not suffer from the drawbacks of tapped delay-line equalizers. The equalizer has a unique MSE (mean-square error) minimum and is superior to conventional equalizers in terms of asymptotic MSE and convergence speed if the channel transfer function does not deviate greatly from its expected response