I/Q通道相位不一致对LFM脉压性能的影响  

Influence of Disagreement between I/Q Phases on the Performance of LFM Pulse Compression

作　　者：朱彬[1] 刘爱华[2] 吴成宾[1] 

机构地区：[1]成都大学信息网络中心,成都610106 [2]成都理工大学通信所,成都610059

出　　处：《电子科技大学学报》2007年第4期696-698,702,共4页Journal of University of Electronic Science and Technology of China

摘　　要：推导了存I/Q通道相位误差的情况下的LFM脉冲压缩输出信号的表达式,定量分析了I/Q通道相位不一致性对LFM脉冲压缩性能的影响,为雷达接收机系统设计中I/Q通道相位误差的控制提供了理论的参考依据。理论分析和计算机仿真表明,在采用加窗方式抑制脉冲压缩输出旁瓣的情况下,I/Q通道的相位误差会脉冲压缩输出的主副比性能产生严重影响。This paper presents an expression of pulse compressed Linear Frequency Modulation （LFM） signal with I/Q phase error. The influence of the error on the performance of LFM digital pulse compression is analyzed in detail, a theoretical reference for controlling I/Q phase error in radar receiver designing is provided. The theoretical analysis and the simulating result show that the I/Q phase error will badly influence on the ratio between mainlobe and sidelobe of LFM digital pulse compression with window function for restraining the sidelobe.

关 键 词：I/Q通道 线性调频 相位 脉冲压缩 

分 类 号：TN957.51[电子电信—信号与信息处理]