Performance analysis of a OCC M-ary spread spectrum system in Rician slow fading channel
Hongxin Tian · Journal of Circuits and Systems · 2008
A novel M-ary spread spectrum system based on orthogonal cyclic codes(OCC) is proposed in this paper.At the transmitter of the system,the M spreading codes of each user are generated by circularly shifting the prototype spreading code.At the receiver,a time-frequency transform domain complex number matched-filter is employed to noncoherently despread and demodulate the received signals.Compared with conventional M-ary spread spectrum system,the OCC M-ary spread spectrum system has very low complexity.The BER calculating formulas of the receiver for single user and multiuser in Rician slow fading channel are derived,and computer simulation results are analyzed.