Abstract:

The process of positioning requires at least pseudo range measurements to four satellites. However, strong interference, even it is intentional, makes the receiver unable to obtain measurements from the multiple GPS satellites. A novel blind interference suppression method is proposed for the GPS receiver. Combined with the  knowledge of each desired satellite’s C/A code, a multitarget adaptive array based on minimum mean square error (MMSE) algorithm is employed for interference suppression of multiple satellites. The proposed method can mitigate the jammers beyond the direction of desired satellites without the location knowledge of desired satellites and estimation of the steering vector. Moreover, the number of desired satellites is not limited by the number of antennas. Numerical examples demonstrate that the method can not only effectively suppress various interferences but also estimate accurately the angle of arrival information of the multiple desired satellite signals.