Abstract: A phased array antenna that can be utilized in one or multiple Global Navigation Satellite Systems. This type of GNSS phased array antenna is often referred to as a CRPA. Various C-Band CRPA embodiments are illustrated to provide advanced performance in a compact real estate size that may fit within L-Band GPS ARINC and L-Band GPS 7-element CRPA size. A Large L-Band CRPA embodiment of the present invention provides for a substantial number of degrees of freedom that can be utilized to provide for advanced beam steering and null steering for advanced interference and multipath mitigation to form nulls over specific geographic regions.

Abstract: This FDsmooth™ frequency domain code multipath mitigation technique for real-time application. Firstly, a multipath spectral estimation technique is used to provide multipath frequency spectrum analysis, which was used to bound the frequency domain region for mitigation; either a multipath model or spectral estimation on the GNSS observable data can be accomplished Secondly, a code-minus-carrier (CmC) analysis exposes the major code multipath error and its frequency spectrum, which was the basis for operation; Thirdly, a code multipath correction was formed and applied to mitigate the multipath error in the GNSS code measurement. Both the multipath mitigated code measurement and the carrier phase measurement can be utilized for the user solution, which improves performance.

Abstract: WaveSmooth™ is a technique to mitigate inherent measurement error for GNSS signals. The WaveSmooth™ technique can be applied for single-frequency or multi-frequency GNSS users. For single-frequency GNSS users, WaveSmooth™ enables smoothing of GNSS measurements, in real-time using wavelets without introducing significant ionosphere divergence. For multi-frequency GNSS users, the WaveSmooth™ technique effectively mitigates multipath error in a real-time fashion. The WaveSmooth™ techniques utilizes wavelet aided methods and operate on the GNSS Code minus Carrier (CmC) signal to mitigate inherent GNSS measurement errors in a real-time fashion to improve the performance of these GNSSs. The WaveSmooth™ error mitigated pseudorange measurement can be used, along with the original carrier phase measurement for a high performance user solution.