Code synchronization error control scheme by correlation of received sequence in phase rotating modulation

It is known that cycle slip due to frequency selective fading causes a burs t error by symbol deletion or insertion, and has a serious effect on mobile radio communication systems. In this paper, first, we show that phase rota ting modulation is suitable for code synchronization error detection. Next, we consider a code synchronization controller using correlation estimator of received sequence, and the controller combines the estimator with a 2 pi /3-shifted modulation to construct a new code synchronization error control scheme as a cycle slip cancelling system. Furthermore, we apply the scheme to the multilevel trellis coded modulation (TCM). Finally, computer simula tion results confirm that proposed scheme is capable of code synchronizatio n error correction.