变换域通信系统及抗干扰性能仿真

基于变换域通信系统(TDCS)收发两端联合干扰感知、自主躲避干扰的基本思想,首先分析了TDCS发射机和接收机的工作原理,在给出了采用对称频谱的TDCS的发射和接收基函数模型之后,通过数学推导得到了TDCS采用MPSK调制时的系统抗干扰误比特率性能公式;其次分析了TDCS的抗干扰机理,发现收发基函数不一致时系统性能将遭受两个方面的损失:一是发射功率损失;二是接收了额外的白噪声和干扰功率;最后,基于MATLAB,仿真了基函数不一致及单音、多音、窄带干扰条件下TDCS的抗干扰性能,仿真结果与理论结果一致;通过仿真比较发现:相同工作带宽下的TDCS抗单音、多音、窄带干扰的性能要好于直接序列扩频系统.

Transform Domain Communication System and Its Performance Simulation of Interference Suppression

First,the operating principles of TDCS transmitter and receiver are analyzed based on the basic idea that the system can avoid interference by cooperative sense of transceiver.The Average Bit Error Probability of system in Interference Suppression with MPSK modulation is derived mathematically after the transmitting and receiving mathematical model with symmetrical spectrum was given out.Then,the mechanism of Interference Suppression in TDCS is analyzed and it is found that the system performance will suffe...