Simulation of Bi-static Radar System Based on Reflected GPS L5 Signals

Reflected GPS signals can have novel application for remote-sensing as they can provide valuable information about the reflecting surface. This paper focuses on the image formation of stationary targets using GPS L5 reflected signals which are processed based on SAR signal processing techniques. At first the power budget analysis for both reflected GPS L1 and L5 signal is carried out for different target to receiver ranges and results are discussed. The complete imaging scenario has been simulated and images using both reflected GPS L1 and L5 signals are presented. Simulations are carried out for different observation time periods and SNR(signal to noise ratio) is calculated for both L1 and L5 frequency signals and results are compared. The results conclude that the SNR and image resolution for L5 signal is superior as compared to L1 signal. The spatial resolution of image reconstructed for reflected L5 signal based on SAR technique is also improved as compared to GPS L1 signal.