QPSK Reconfigurable Digital Receiver with timing synchronization

The fractional delay of a QPSK signal is synchronized in the receiver by a TED, and PLL and a FF

QPSK multirate radio receiver with non – synchronized Intermediate Frequency
(IF) and reconfigurable downsampling conversion. In order to avoid the aliasing in the received signal a compensated cascade of integrator comb (CIC) filter is introduced. The fractional delay in the signal due to the channel need a timing synchronization correction in the receiver, which is performed at the output of the Matched Filter using the Farrow structure-based interpolator.