The Enemy Inside GPS Jammed by Room, Host, Self

摘要

To utilize signals transmitted through or reflected off walls, indoor GPS receivers require sensitivities 20dB below that of older, conventional receivers. At these levels, jamming may come from low-power sources in the room, in the equipment, or in the chipset itself, The authors address these "inside" sources — arising from co-location of antenna, baseband, and host electronics — producing emissions that readily exceed interference levels, and they offer some design considerations for indoor locatabiiity.