GSM/CDMA手机信号RF无线干扰器设计

本文首先介绍了几种无线电干扰机的技术方案,并对几种方案进行了比较,提出了一种性价比比较高的技术方案,然后在对几款GSM和CDMA手机进行实际测试的基础之上,对干扰机整机电路进行了分析和计算,并进行了实际的验证。

美陆军研制新型便携式无线电引信干扰机

引信对抗是电子对抗的重要领域，美国曾在其解密的AD报告中披露了它在上世纪五、六十年代研制、试验无线电引信干扰机的一些情况，其后就再也没有公开报道过。本文介绍的是美国在将近五十年后再次披露的其最新研制的一种便携式无线电引信干扰机，该干扰机引起了国内引信界及电子对抗界的关系。

双通道带通采样和多相滤波的微波引信信号侦察接收机

用于侦察无线电引信信号的数字侦察接收机必须具备以全概率截获宽频带内多个引信信号并进行近实时处理的能力,以此为目标设计了一种无线电引信侦察接收机的数字化方案。针对带通采样存在着频率覆盖盲区的问题,提出了宽带中频信号双通道带通采样的方法,通过增加一个采样通道既解决了传统处理盲区方法中设计复杂采样时钟电路、高矩形系数滤波器的困难,还缓解了后续DSP处理压力。为处理双通道采样带来的冗余数据并进一步解决实时性问题,推导出了一种更实用的基于实信号多相滤波的数字信道化方法。最后进行了带通采样、数字信道化和冗余数据剔除和FFT测频的功能仿真,结果证明方案功能正确,并具有很强的去宽带加性白噪声的能力。

New Interference Estimation for Power Control in Wireless Networks

This paper proposes new interference estimation for power control in broadband wireless data networks. The proposed approach gives the filtered interference power in real-time removing undesired effects such as the fluctuation of interference power and the measurement noise due to receiver noise. The well-known Finite Impulse Response （FIR） structure filter is adopted for both the interference and the noise covarianee estimation. The proposed mechanism provides both the filtered interference power and the filtered number of active co-channel interferers, which shows good inherent properties. And the filtered interference power is not affected by the constant number of active co-channel interferes. It is also shown that the filtered number of active co-channel interference is separated from the filtered interference power. From discussions about the choice of design parameters such as window length and eovariance ratio, they can make the estimation performance of the proposed FIR filtering based mechanism as good as possible. Via extensive computer simulations, the performance of the proposed mechanism is shown to be superior to the existing Kalman filtering based mechanism.