Fractional time domain interpolation

摘要

A clock offset compensation arrangement has a fractional interpolator for applying a trigonometric interpolation to a sampled input signal according to a clock offset signal. It uses transform based processing in the frequency domain. Compared to a polynomial type interpolation it can be easier to implement, and can achieve a closer approximation to a perfect interpolation. It can reduce the effects of non linear type errors introduced by truncation of higher powers. The arrangement can be applied to receivers or transmitters of multicarrier modems, or any application which needs rate adaption or synchronization.