Patent ID: 7496156
Filing Date: 2009-02-24
Classification: H04L

Abstract:
1. A receiver having a digital timing recovery function, comprising: an analog-digital converter for sampling and converting a received analog signal at a predetermined sampling time period into a digital signal; a differential operator for delaying the digital signal for a sampling time interval to produce conjugate complex number of the delayed signal and multiplying the digital signal by the conjugate complex number; a first correlator for multiplying an output signal from the differential operator by conjugate complex number of a preset first reference symbol to produce first correlation value; a frequency offset detector for producing an imaginary part from the first correlation value and adding the imaginary part during a preamble field interval of the received analog signal to detect entire frequency offset in the preamble field interval; a timing controller for controlling timing recovery of the received analog signal according to the magnitude of the frequency offset; and a sample data operator for adding or deleting data sample into/from a payload of the digital signal in response to the control of the timing controller.