Comparison of efficient interpolation techniques for symbol timing recovery

There is a trend of using digital receivers where the sampling of the received signal is not synchronized to the incoming data symbols. In these receivers, timing adjustment must be done after sampling using interpolation. There are many different interpolation methods which can be used. We compare three different polynomial-based interpolation methods which can be efficiently implemented using the so-called Farrow (1988) structure. Methods to be compared are the linear and cubic Lagrange interpolation and a new interpolation method proposed earlier by the authors