The DSP implementation of a new timing recovery technique for high-speed digital data transmission

An innovative digital timing recovery method for synchronous digital receivers is described. This method is based on estimating the impulse response of the channel and then choosing an optimal sampling phase from this estimate. The method uses an adaptive transversal filter (TF), operating at the baud rate and driven by a decision-directed reference, to cancel the sampled received far-end signal. This timing recovery technique connects, in a natural way, with receivers using decision feedback equalizers (DFEs). A 30-tap DFE receiver incorporating this timing recovery scheme has been simulated and implemented in real time on a single DSP (digital signal processor)