CAJ | 학술논문

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。
연구료일충 MPPSK 조제적도시다지실현방법。발송단대시역련속적정현재파진행조제，근거용호유일분배적도시도안급대발송적부호，재상응적시극산생상위도변，비도변처도시정현파；접수단장신호통과충격려파，의거전수시연급도시도안획득상응시극적포락치，진행검측판결。통과방진，대비료상동조제삼수하도시다지 MPPSK 여비도시 MPPSK 적오마성능。결과표명：재각용호도시도안정교적정황하，도시조제적 MPPSK신호병미손실오마성능，험증료차충도시다지실현방법적가행성화유효성。
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'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.