Long term integration of radar signals with unknown Doppler shift for ubiquitous radar  

作　　者：Qinglong Bao Zengping Chen Yue Zhang Jian Yang 

机构地区：[1]ATR National Defense Science and Technology Key Lab,National University of Defense Technology, Changsha 410073, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2011年第2期219-227,共9页系统工程与电子技术（英文版）

摘　　要：Ubiquitous radar is a new radar system that provides continuous and uninterrupted multifunction capability within a coverage volume. Continuous coverage from close-in ＂pop-up＂ targets in clutter to long-range targets impacts selection of waveform parameters. The coherent processing interval （CPI） must be long enough to achieve a certain signal-to-noise ratio （SNR） that ensures the efficiency of detection. The condition of detection in the case of low SNR is analyzed, and three different cases that would occur during integration are discussed and a method to determine the CPI is presented. The simulation results show that targets detection with SNR as low as -26 dB in the experimental system can possibly determine the CPI.Ubiquitous radar is a new radar system that provides continuous and uninterrupted multifunction capability within a coverage volume. Continuous coverage from close-in ＂pop-up＂ targets in clutter to long-range targets impacts selection of waveform parameters. The coherent processing interval （CPI） must be long enough to achieve a certain signal-to-noise ratio （SNR） that ensures the efficiency of detection. The condition of detection in the case of low SNR is analyzed, and three different cases that would occur during integration are discussed and a method to determine the CPI is presented. The simulation results show that targets detection with SNR as low as -26 dB in the experimental system can possibly determine the CPI.

关 键 词：ubiquitous radar low signal-to-noise ratio （SNR） coherent processing interval （CPI） coherent integration non-coherent integration. 

分 类 号：TN959.4[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]