Spatial temporal adaptive processing based on delay vector tracking loop

In order to overcome the high complexity, the slow convergence speed and the week robustness of the Spatial Temporal Adaptive Processing (STAP). In this letter, a novel robust scheme combining a variable forgetting factor mechanism STAP algorithm and vector delay lock loop (VDLL) is proposed to improve the anti-jamming capability of the navigation receiver. The VDLL is used to supply reference information relying on the unique structure of the coarse acquisition code for spatial temporal adaptive processing. Then an improved variable forgetting factor constant modulus recursive least squares algorithm (ITVFF-CCM-RLS) is proposed for enhancing satellite signals and suppressing interferences. Finally, the navigation signal without interference is used for VDLL tracking and calculating satellite pseudoranges. Simulation results show that the improved method can not only effectively improve the convergence speed, but also ensure the reliability of the receiver in the presence of intense interference.