Design and Simulation of High Speed Data Transmission in Distortion Environment
Ding Wang · Information Security and Communications Privacy · 2008
A novel transmission scheme,known as M-ary spread spectrum multicarrier modulation scheme utilizing orthogonal cyclic code,is proposed. System model of the scheme is presented first,and then the signal format and design of critical part are given.In the transmitter,the user realizes Mary spreading spectrum by adopting orthogonal cyclic codes and implements OFDM modulating,and in the receiver,despreading spectrum is done with only two data matched filter after OFDM demodulation.Simulation results show that the proposed scheme has lower BER,better antimultipath and Doppler frequency shift performance than traditional M-ary/QPSK spread spectrum system under the condition of unmanned aerial vehicle channel.