An M-ary Orthognal Coded Spread Spectrum(OCSS) system with 2.4Kbps and 16Kbps data rate is realized. The ereieved signal can be despreaded under low SNR. Firstly
the methods for spreading and despreading are discussed. Secondly
formulations for estimating the carrier and the sampling timing initial phase offset of MSK spread spectrum signal are derived. Thirdly
Q-channel correlation method for phase tracing is proposed. Finally