Pilot based carrier synchronization scheme

摘要

The Invention relates to a process for providing a phase synchronization of a pilot aided carrier of an input digital signal z(k), said signal z(k) comprising signal fields comprised of Ls symbol signals, namely a block of LP pilot symbol signals ZP(k) and a data field of (Ls -LP) data symbol signals Zd(k), and characterized in that it comprised for each signal field (l) :extracting the pilot symbol signals ZP(k) andcalculating an unwrapped phase estimate θ̂(lLs) over the pilot block of said signal field (1) and :interpolating said unwrapped phase estimates of successive signal fields (l, l + 1 .... ) with a Wiener interpolator having M taps to obtain interpolated phase estimates having a Minimum Mean Square Error ;providing linear interpolation between said interpolated phase estimates to obtain phase correction estimates (θ̂(ks)) over the data field of said signal fields;calculating from said phase correction estimates (θ̂(ks)) a phase correction to be applied to said signal Z(k).