论文部分内容阅读
大功率干扰系统使用非线性和高效的功率放大器。为了在干扰信号的频谱上创造一个干净的频率区来进行无线通信,必须要求在干扰系统输出的干扰信号的频谱上产生一个零陷区。零陷区要能够跟踪FHSS系统的跳频图案。产生这样一个零陷区很大程度上受到系统互调效应的影响。互调效应只能够通过对PA非线性特性的估计来去除。提出了一种实现结构,能够在一个窄带范围内抵消发射机的互调效应。如果要这样的系统能够实现,窄带反馈策略是必须的,同时还需要AD和滤波技术。通过理论和结构体系研究验证了这样的系统确实是可以实现的,并且在进行大功率干扰时可以有效地进行无线通信。
High-power jammer systems use non-linear and efficient power amplifiers. In order to create a clean frequency region on the spectrum of the interfering signal for wireless communication, a null region must be created on the frequency spectrum of the interfering signal output by the interfering system. Null zones should be able to track the frequency hopping pattern of the FHSS system. The creation of such a zonal area is greatly affected by the intermodulation effect of the system. Intermodulation effects can only be removed by estimating the non-linear characteristics of PA. An implementation structure is proposed to counteract the intermodulation effect of the transmitter over a narrow band. If such a system is to be implemented, a narrowband feedback strategy is required, along with AD and filtering techniques. The theoretical and structural studies show that such a system is indeed achievable and that wireless communication can be effectively performed during high-power interference.