一种基于递归滑动DFT信道化结构的DRFM干扰机设计

Design of a DRFM Jammer Based on a Recursive Algorithm and Sliding DFT Channelized Structure

大瞬时带宽,高信噪比,实时性是衡量干扰机性能的重要指标,而数字信道化技术中的滑动DFT结构能够满足这些指标的实现,因此本文选用滑动DFT信道化结构设计干扰机。通过数据的逐点滑动,大大提高了干扰机的时间分辨率,并且通过频域加窗的递归算法来进一步减少DFT的运算量,在工程中要比基2FFT算法节省大量的乘法器资源。最终仿真得出产生的干扰效果良好,所以此种结构的干扰机在今后的工程中有较大的运用价值。

Large instantaneous bandwidth,high signal to noise ratio,and real-time capability are important features of jammers.The sliding DFT structure of the digital channelizing technology can help realize those jammer features.Therefore,the sliding DFT channelized structure is used to design a jammer in this paper.The point-by-point sliding of data greatly improves the time resolution of the jammer.In addition,a recursive algorithm featuring frequency-domain windowing is used to further reduce the computation load of DFT,so the proposed jammer requires much less multiplier resource than those using the radis-2 FFT algorithms.Finally,the simulation results show that the proposed jammer has good jamming performance.Therefore,the proposed jammer has good prospects for engineering application.