An optimal array processor for GPS interference cancellation

Of the wide variety of array processors, which are available to GPS receiver designers for noise and RF interference suppression, few achieve good performance and possess well-defined signal preservation properties. We introduce a new optimal array processor for the reception of GPS signals in RF interference and noise, that maximises geometric positioning precision. Comparison with well-known and previously proposed array processors demonstrates a superior reduction of the positioning error from noise and interference residuals. In addition, we derive the processor for optimisation of precision in a single position co-ordinate, such as height, or time; the improvement of vertical precision could be a significant development for the use of GPS in aviation.