连续波雷达直达波对消子系统设计  

Design of direct path interference cancellation subsystem for continuous-wave radar

作　　者：黄何平[1] 王玲[1] 李勇智[1] 

机构地区：[1]湖南师范大学物理与信息科学学院,湖南长沙410081

出　　处：《现代电子技术》2013年第3期5-7,共3页Modern Electronics Technique

基　　金：湖南省自然科学基金项目(10JJ6102)

摘　　要：为了提高连续波穿墙生命探测雷达目标的生命回波信号的检测效果,在发射机和接收机之间增加直达波对消子系统模块。在2.4 GHz频段,采用射频集成芯片进行直达波对消子系统的硬件设计。根据对消后的实时功率检测结果,通过微处理器的自动搜索控制程序,调节对消估计信号的幅度和相位,最后实现对消比大于40 dB的直达波射频频段自动对消效果,有效地降低连续波雷达的强直达波的干扰。In order to improve the detection effect of the continuous-wave through-the-wall life-detecting radar （CW-TWLDR）, a direct path interference cancellation module is added between the transmitter and the receiver. In 2.4 GHz band, the hardware sys- tem for direct path interference cancellation subsystem is designed using radio frequency integrated circuit （RFIC）. According to feed- back information of real-time cancellation power detection, the automatic control program adjusts the amplitude and the phase of the estimation signal. The automatic cancellation of direct path wave interference is realized in RF band and the cancellation ratio is greater than 40 dB. Therefore, the cancellation system effectively reduces the strong direct path interference for continuous-wave radar.

关 键 词：连续波雷达 射频干扰 直达波对消 2.4GHz频段 

分 类 号：TN958.97[电子电信—信号与信息处理]