线性调频波形产生器相位误差影响分析  

Effects of Phase Errors on LFM Waveform Generator

作　　者：胡仕兵[1] 汪学刚[1] 姒强[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子测量与仪器学报》2008年第2期101-106,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：线性调频(LFM)波形产生器是现代雷达技术的重要研究内容,而相位误差则是影响线性调频波形产生系统产生信号质量的最关键因素之一。本文在分析线性调频波形产生器相位失真原因的基础上,深入探讨了波形产生器中周期相位误差、一次相位误差、二次相位误差、三次相位误差、四次相位误差、高次相位误差和随机相位误差对输出信号脉压性能的影响,给出计算机仿真结果并验证了理论分析的正确性,进而得到LFM波形产生器系统相位误差的理论设计指标。所得结论对于大时带积超宽带LFM脉压信号产生器的研制具有重要的指导意义。Linear-frequency-modulated （LFM） waveform generators are important research contents in modem radar technology, and phase error is one of the most important factors that affect the quality of output signals produced by LFM waveform generation systems. On the basis of analyzing the causes of phase distortion in these generators, the effects of the periodic phase error, primary phase error, quadratic phase error, cubic phase error, quartic phase error, other higher-order phase errors and random phase error on the pulse-compression performance of output signals are investigated in detail. Then the computer simulation results are presented, which proves the correctness of the theoretical analysis, The theoretical design guidelines for phase errors of LFM waveform generation systems are finally obtained. All the conclusions have important instructional meaning for developing ultra wide-band high time-bandwidth product LFM pulse compression signal generators.

关 键 词：波形产生器 线性调频信号 相位误差 脉冲压缩 失真分析 

分 类 号：TN957.51[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]