Long term integration of radar signals with unknown Doppler shift for ubiquitous radar |
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| Authors: | Qinglong Bao Zengping Chen Yue Zhang Jian Yang |
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| Affiliation: | ATR National Defense Science and Technology Key Lab, National University of Defense Technology, Changsha 410073, P. R. China |
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| Abstract: | 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. |
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| Keywords: | ubiquitous radar low signal-to-noise ratio (SNR) coherent processing interval (CPI) coherent integration noncoherent integration |
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