Abstract: Various embodiments of the present technology generally relate to localization of one or more radio frequency interference (RFI) emitters. More specifically some embodiments relate to localization of RFI emitters that interfere with Global Navigation Satellite System (GNSS) receivers by integrating the location estimates of two or more localization techniques. Various embodiments may be used to more accurately estimate an interference source (e.g., an RFI emitter's location) than each localization technique separately.

Abstract: Various embodiments of the present technology generally relate to Global Navigation Satellite Systems (GNSS). More specifically, the embodiments of the present technology relate to a smart antenna module resistant to Radio Frequency Interference (RFI) saturation for dual-frequency GNSS receivers. In some embodiments, a dynamically configured antenna module architecture can be for a dual-band (or multi-frequency) GNSS receiver that can adapt to different RFI conditions by performing corresponding working modes. For example, some embodiments of the smart antenna can measure (e.g., using a power detector) the power of an incoming multi-frequency signal to determine when the multifrequency signal is saturated. Then, using control logic the smart antenna can determine which frequency in the multi-frequency signal is usable and isolate (e.g. using radio frequency components) a frequency that is not saturated. A position estimate can then be generated based on the isolated multi-frequency signal.

Abstract: There is provided an apparatus comprising an antenna (105) configured to receive a signal from a global navigation satellite system, wherein the antenna includes a first feed and a second feed; a hybrid coupler (110) including a first hybrid input, a second hybrid input, a first hybrid output, a second hybrid output, and wherein the first hybrid output is shifted in phase by 90 degrees relative to the second hybrid output; a variable phase shifter (150) including a shifter input and a shifter output, hybrid output; and a combiner (155) including a first combiner input, a second combiner input, and a combiner output, wherein the first combiner input is coupled to the shifter output, and the second combiner input is coupled to the second hybrid output, and wherein the combiner output is provided to detection circuitry (197).

Abstract: Various embodiments of the present technology generally relate to Global Navigation Satellite Systems (GNSS). More specifically, the embodiments of the present technology relate to a smart antenna module resistant to RFI saturation for dual-frequency GNSS receivers. In some embodiments, a dynamically configured antenna module architecture can be for a dual-band (or multi-frequency) GNSS receiver that can adapt to different RFI conditions by performing corresponding working modes. For example, some embodiments of the smart antenna can measure (e.g., using a power detector) the power of an incoming multi-frequency signal to determine when the multifrequency signal is saturated. Then, using control logic the smart antenna can determine which frequency in the multi-frequency signal is usable and isolate (e.g. using radio frequency components) a frequency that is not saturated. A position estimate can then be generated based on the isolated multi-frequency signal.

Abstract: Various embodiments of the present technology generally relate to localization of one or more radio frequency interference (RFI) emitters. More specifically some embodiments relate to localization of RFI emitters that interfere with Global Navigation Satellite System (GNSS) receivers by integrating the location estimates of two or more localization techniques. Various embodiments may be used to more accurately estimate an interference source (e.g., an RFI emitter's location) than each localization technique separately.

Abstract: There is provided an apparatus comprising an antenna (105) configured to receive a signal from a global navigation satellite system, wherein the antenna includes a first feed and a second feed; a hybrid coupler (110) including a first hybrid input, a second hybrid input, a first hybrid output, a second hybrid output, and wherein the first hybrid output is shifted in phase by 90 degrees relative to the second hybrid output; a variable phase shifter (150) including a shifter input and a shifter output, hybrid output; and a combiner (155) including a first combiner input, a second combiner input, and a combiner output, wherein the first combiner input is coupled to the shifter output, and the second combiner input is coupled to the second hybrid output, and wherein the combiner output is provided to detection circuitry (197).

Abstract: An improved acquisition and tracking system for Global Positioning System (GPS) signals. The system relies on block adjustment of the synchronizing signal of the bi-phase shift keying (BPSK) signal in order to obtain correct carrier frequency and phase angle. This improved system has the advantages of being more robust in the presence of noise than conventional approaches and also of lending itself to simplified implementation since synchronization of the Coarse/Acquisition (C/A) code need only be within half of a chip in order to maintain lock.