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本文介绍了一种新研制成功的可编程全数字式MTD系统。系统由64阶FIR复滤波器覆盖极低速目标区域,由64点FFT等效滤波器组覆盖高速目标区域。一个细颗粒的全平面动态杂波图存放了各分辨单元中地杂波的交流成分,用以形成各多普勒通道中的地杂波恒虚警门限。全机内设有灵活的动态自诊断逻辑,可自动指示故障出现的模块。当杂波谱模型为苛刻的主方谱分布时,系统的平均改善因干接近48dB。由于系统采用了可编程技术,因此只须改变程序,就能适用于不同参数的雷达。
This article describes a newly developed programmable full digital MTD system. The system covers the very low speed target area by a 64-order FIR complex filter and the high-speed target area is covered by a 64-point FFT equivalent filter bank. A fine-grained, all-plane dynamic clutter map stores the AC components of the clutter in each resolving cell to form the clutter-invariant alarm threshold for each Doppler channel. The machine has a flexible dynamic self-diagnostic logic, can automatically indicate the failure of the module. When the clutter spectrum model is a harsh principal spectral distribution, the average improvement of the system is close to 48 dB due to dryness. As the system uses programmable technology, so just change the program, you can apply to different parameters of the radar.