中文摘要：

研究了一种MPPSK调制的跳时多址实现方法。发送端对时域连续的正弦载波进行调制,根据用户唯一分配的跳时图案及待发送的符号,在相应的时隙产生相位跳变,非跳变处都是正弦波;接收端将信号通过冲击滤波,依据传输时延及跳时图案获得相应时隙的包络值,进行检测判决。通过仿真,对比了相同调制参数下跳时多址MPPSK与非跳时MPPSK的误码性能。结果表明：在各用户跳时图案正交的情况下,跳时调制的MPPSK信号并未损失误码性能,验证了此种跳时多址实现方法的可行性和有效性。

英文摘要：

In order to realize multiple-access communication of M-ary position phase shift keying （MPPSK）modulation, a realization method was researched based on time-hopping.The MPPSK time-hopping modulator diagram and demodulator diagram were designed,respectively.The sending signal was modulated on a continuous sine wave,of which the phase jumped in corresponding time slots according to the symbols ready to send and the time-hopping sequence exclusively as-signed to one user.The envelope in corresponding time slots was obtalned for demodulation according to the transmission delay and the time-hopping sequence after receipt signal passed through the impacting filter.By simulation,the bit error rate （BER）of time-hopping multiple-access MPPSK and that of non-time-hopping MPPSK were compared under the same modulation parameters.The simulation results show that time-hopping modulated MPPSK signals don＆#39;t lose BER perform-ance when the time-hopping sequences of users are orthogonal,thus the feasibility and effectiveness of this time-hopping multiple-access realization are demonstrated.