Design of the interpolation filter in an all-digital timing recovery scheme

A design method was introduced to efficiently implement an interpolator by Farrow structure, which can be used in an all-digital timing recovery scheme. An algorithm was presented to calculate the interpolator coefficients of Farrow structure and minimize the mean square error (MSE) at the output of the receiver. Simulation results show that compared with other conventional interpolation filters, the per/ormance with this optimized Farrow coefficients was improved in minimum MSE and the implementation complexity was reduced.