Interior Performance Test of High Precision GPS/BDS Compatible Receivers

As the pace of BeiDou Navigation Satellite System(BDS)product industrialization is accel-erating,research on the internal performance of BDS receiver is in great demand.This paper focuseson a method for internal noise levels in high-precision GPS/BDS compatible receivers.A single differ-ence residual method is introduced to test for internal noise based on measured data.Results showthat the single difference residual method can test for internal noise in GPS/BDS compatible receiverseffectively and is more applicable to BDS designed with hybrid constellations.