Reduced rank calculation of space-time anti-jamming for navigation receiver

Navigation receiver is easily influenced by radio frequency (RF) interference in complicated electromagnetic environment, so it is necessary to enhance its ability of cancelling interference. Space-time anti-jamming system model of the navigation receiver is established. Multistage Wiener filter and conjugate gradient iteration algorithms are researched, and their characteristics such as calculation and storage are analyzed. A new method of difference sample mean square error (DSMSE) is proposed to stop calculation timely. The simulation results show that the two algorithms are valid in space-time adaptive processing for navigation receiver, and the DSMSE method can stop calculation process when the anti-jamming performance of the algorithm almost reaches its best performance, avoiding extra computation and alleviating computational burden.