Weak target detection technology of passive radar on the navigation satellite signal

Abstract

The passive radar detection system receives secondary reflection signal by the navigation satellite signal. The secondary reflection signal is too weak to detect the target. The method to improve the signal-to-noise ratio (SNR) of weak targets is proposed based on the accumulation algorithm. First, short-time correlation of the echo signal sequence is accumulated in the short-time coherence. Then long-time coherent accumulation is used in the frequency multiplication sequence. Finally, incoherent accumulation is used to detect weak target. By simulation, the SNR of target signal increases 8 dB than tradition method.

Keywords

• geophysical signal processing
• object detection
• passive radar
• radar signal processing
• radar detection
• weak target detection technology
• navigation satellite signal
• passive radar detection system
• secondary reflection signal
• signal-to-noise ratio
• accumulation algorithm
• short-time correlation
• echo signal sequence
• short-time coherence
• long-time coherent accumulation
• incoherent accumulation
• target signal
• noise figure 8.0 db