CAJ | 학술논문

目前对多音干扰的分析主要是针对跳频通信系统开展的，并且通常假设干扰是不变的。该文对TD-SCDMA系统在时变多音干扰下的误码率性能进行了分析。考虑实际系统中干扰源的移动性，将干扰信道建模为时变瑞利衰落信道。分析了多普勒频移对系统性能的影响，推导了误码率公式，并通过计算机仿真验证了理论推导的正确性。理论分析和仿真结果表明，多普勒频移越大，系统干扰效果越差，该结果对干扰和抗干扰技术提供了理论基础。
목전대다음간우적분석주요시침대도빈통신계통개전적，병차통상가설간우시불변적。해문대TD-SCDMA계통재시변다음간우하적오마솔성능진행료분석。고필실제계통중간우원적이동성，장간우신도건모위시변서리쇠락신도。분석료다보륵빈이대계통성능적영향，추도료오마솔공식，병통과계산궤방진험증료이론추도적정학성。이론분석화방진결과표명，다보륵빈이월대，계통간우효과월차，해결과대간우화항간우기술제공료이론기출。
The existing analyses of multi-tone jamming (MTJ) are mainly focused on the frequency hopping system, and assume that the jamming signal is time-invariant. In this paper, the bit error rate (BER) performance of the time division-synchronization code division multiple access (TD-SCDMA) system is analyzed in the presence of time-varying multi-tone jamming. The practical scenario where MTJ signal experiences time-varying Rayleigh fading channel is considered. The effect of the Doppler shift on the performance is studied. The BER expression is derived and validated by computer simulations. The simulation results show that the performance degrades as the Doppler shift increases. The study provides theoretical basis for jamming and anti-jamming technology.