Patent ID: 8295404
Filing Date: 2012-10-23
Classification: H04L

Abstract:
1. A method for adjusting timing of a DPSK signal, the method comprising: digitizing a DPSK signal to produce a digital DPSK signal having a first set of sub-samples and a second set of sub-samples, the first set of sub-samples and the second set of sub-samples being even and odd samples, respectively, or vice versa; down-sampling the digital DPSK signal by using the first set of sub-samples to produce an intermediate signal; determining whether the intermediate signal includes a timing error; using a signal processing block, retiming the intermediate signal in response to the timing error by down-sampling the digital DPSK signal using the second set of sub-samples; producing phase and amplitude signals from the intermediate signal; and determining the timing error by comparing differences in amplitudes between currently selected and adjacent sub-samples of the amplitude signal.