基于多相处理的宽带LFM信号产生技术  

Wideband LFM signal generation based on polyphase processing

作　　者：蒋康辉 Jiang Kanghui(Array and Information Processing Laboratory,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学阵列与信息处理实验室

出　　处：《国外电子测量技术》2018年第7期1-5,共5页Foreign Electronic Measurement Technology

摘　　要：宽带线性调频信号广泛用于雷达跟踪和目标识别,提出了一种宽带线性调频信号的产生方法,在FPGA工作频率受限的条件下,利用多相处理技术,提高了信号采样的数据率和线性调频信号的带宽;设计了一种改进的多相滤波器,保持了多相滤波器的对称性,减少了滤波器消耗的乘法器资源;利用多相处理采样率与中频频率的关系,实现了基带信号的数字上变频（DUC）。提出的方法在FPGA和DAC构成的硬件平台进行了仿真和验证,并对性能进行了分析。Wideband LFM signal is widely used for radar tracking and target classification.One method of generating wideband LFM signal is proposed.By using polyphaseprocessing,the sampling rate and bandwidth of LFM signal are increased.In order to reduce multiplier resources of FPGA by using filter symmetryproperties,a kind of improved polyphase filter is designed.Utilizing relationship between sampling rate and IF frequency,a simplified digital up frequency conversionis realized.Method introduced here is simulated and verified by hardware consists of FPGA and DAC and performances is analyzed.

关 键 词：多相处理 宽带LFM信号 数字上变频 

分 类 号：TN832.1[电子电信—信息与通信工程]