论文部分内容阅读
前言 日益密集复杂的信号环境以及对舰导弹的飞速发展,对舰艇现代电子支援措施(ESM)提出了越来越高的要求。对目标信号要求具有高达100％的空域和频域的截获概率和极快的反应速度(即逐个脉冲、逐个波束给出目标信号的频率和方位信息,并且高速分选信号和识别信号)。就频域而言,显然搜索式测频接收机是不能胜任上述工作的。由宽带数字鉴频器构成的瞬时测频接收机(IFMR),由于具有宽的瞬时带宽,又能以高的精度瞬时测出目标信号的载频。因此,对现代舰艇的ESM系统而言,这种接收机是比较理想的。然而,瞬时测频
INTRODUCTION The increasingly complex and complicated signal environment and the rapid development of ship-to-ship missiles have set ever higher and higher requirements on the modern Electronic Support Measures (ESM) of ships. The target signal is required to have up to 100% spatial and frequency domain intercept probability and extremely fast response speed (ie, frequency and position information of the target signal beam by beam, and high-speed sorting signal and identification signal). In the frequency domain, it is clear that the search-frequency receiver is not capable of the above work. The instantaneous frequency-measuring receiver (IFMR), which is composed of a wideband digital frequency discriminator, can measure the carrier frequency of the target signal instantaneously with high instantaneous bandwidth due to its wide instantaneous bandwidth. Therefore, this type of receiver is ideal for modern naval ESM systems. However, instantaneous frequency measurement