High order modulation stripping for use by synchronization algorithms in communication systems

Abstract

In communication systems, the detection of the synchronization parameters such as phase offset and frequency offset is of a paramount importance to the decoding process of received signals. Signal modulation while it provides efficient use of the available bandwidth does dictate the use of data aided detection algorithms. Blind algorithms in the presence of modulation, although have the potential of providing a significant saving on bandwidth, usually fail to perform or produce suboptimum results in comparison with the data-aided methods. In this paper, we propose a new method to strip off high order modulation in order to be able to use to a certain extent the efficient blind detection algorithms.