Design of data-aided symbol timing and carrier synchronization loop

Considering the problem of joint symbol timing and carrier estimation with high complexity for burst communication systems, a data-aided synchronization algorithm was proposed. First, the matched filter was implemented by the architecture of polyphase filter bank which avoids the use of interpolation filter. And then, the implementation and control of sample phase in polyphase filter bank was discussed. Second, a carrier synchronization estimator with optimal pilot placement was constructed based on the sum of autocorrelation function of the pilots, whose estimation accuracy can attain Cramer-Rao bound and has a low complexity. Lastly, the simulations were presented to verify the new algorithm performance. The results show the new receiver is easy to realize and can achieve perfect synchronization with a certain amount of pilots.