FPGA的弱小信号处理关键技术研究  

Study on Key Technologies for Weak Signal Processing Method of FPGA

作　　者：国磊[1] 尚勇 白森[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]民航飞行学院洛阳分院,河南洛阳471009

出　　处：《航空兵器》2016年第3期45-48,共4页Aero Weaponry

摘　　要：算法的计算精度要求和算法实现所需的FPGA资源是FPGA选型的关键因素。本文从工程应用角度出发,详细地论述了基于FPGA的弱小信号处理关键技术研究及实现,结合噪声成形算法给出FPGA实现信号处理时滤波器输出截断位数确定原则,依此原则既确保计算精度又可节省FPGA硬件消耗。最后分析影响弱小信号检测的直流问题,阐述其产生的原因并给出有效的直流抑制方法。The calculation precision of algorithm and the FPGA resources for the algorithm imple- mentation are the key factors in the FPGA selection. From the perspective of engineering application, the research and implementation of weak signal processing technology based on FPGA is discussed in detail. Combined with the noise shaping algorithm, the paper gives the principle of determining the filter output truncation number when the signal processing is realized by FPGA. This can ensure the accuracy of calcu- lation and save the FPGA hardware consumption. Finally, the influence of direct-current （DC） in the weak signal detection is analyzed, the reason for DC generation is expounded and an effective method of DC inhibition is provided.

关 键 词：信号处理 弱小目标检测 FPGA 噪声成形 直流抑制 滤波器截断 

分 类 号：TN911.72[电子电信—通信与信息系统]