摘要
提出一种改进的波形存储直读法产生宽带雷达线性调频信号的设计方案。以单片高速FPGA取代以往设计中使用的DSP+FPGA作为系统的控制核心,简化系统结构。外围接口通用化、模块化,可产生带宽200MH z以内、时宽800μs以内的任意LFM信号。应用预失真技术,产生的宽带信号线性调频相位失真小于±1度,线性调频脉冲顶部不平坦度小于0.5dB,采用H amm ing加权后脉冲压缩峰值旁瓣比大于38dB。
This paper presents an advanced generation method of LFM signal based on waveform storage method. Using only one high speed FPGA as the control-unit to replace the way of using DSP＋ FPGA, it makes the system structure much easier. It can generate any kinds of LFM signal, whose bandwidth is less than 200MHz and time-width is less than 800us. By using the compensation technique, the phased error of the LFM signal is less than 1 degree and its flatness is less than 0. 5dB. After compressing the signal with hamming window, the PLSR can be more than 38dB.
出处
《火控雷达技术》
2006年第1期56-59,共4页
Fire Control Radar Technology
关键词
FPGA
高速
直接数字波形合成
宽带信号源
FPGA
high speed tdirect digital waveform synthesis
wideband signal source
