Abstract: A system and method for multipath estimation and mitigation is disclosed. In some embodiments, the method includes performing a first weight estimation operation for a first number of multipath components of a received correlation, calculating a remaining error energy by subtracting a sum of estimated multipath components from the received correlation, determining whether a satisfaction criterion is met for the remaining error energy, and, in response to determining that the satisfaction criterion is not met, performing a second weight estimation operation for a second number of multipath components, the second number being greater than the first number.

Abstract: Systems, methods and apparatuses for generating long coherent integrations of received global navigation satellite system (GNSS) signals are described. One method includes generating coherent 1 second I/Q correlations by at least two stages of summation starting with 1 millisecond correlated I/Q signal samples. Intermediate stage coherent I/Q correlations may be modified based on, for example, lack of carrier phase lock and/or the carrier signal-to-noise density (C/N0). Such modifications include phase rotation. Energy/power amplitudes calculated from the coherent 1 second I/Q correlations may be used for improving multipath mitigation, the signal-to-noise ratio (SNR), and other GNSS receiver operations and functions.

Abstract: Systems, methods and apparatuses for multipath mitigation of received global navigation satellite system (GNSS) signals by using pattern recognition are described. One method includes summing correlations of received GNSS signals over time to generate a correlation window. The present system/method recognizes a pattern of a stored correlation window which matches the generated correlation window. The stored correlation window is one of a plurality of stored correlation windows, and each of the plurality of stored correlation window is stored with a corresponding range error. The stored range error corresponding to the matching stored correlation window is used to improve GNSS range measurement.

Abstract: A method, electronic device, and system are herein disclosed. The method includes loading a plurality of available satellite signal carriers, generating a hypothesis for each of the plurality of available satellite signal carriers, combining the plurality of available satellite signal carriers into a number of signal combinations based on the created hypotheses, and determining whether a satellite signal is detected with one of the number of signal combinations.

Abstract: An electronic device, method and system for global navigation satellite system (GNSS) are herein disclosed. The electronic device includes an antenna configured to receive a satellite vehicle (SV) signal, and a processor configured to determine a carrier-to-noise density ratio (CNO) of the SV signal, compare the determined CNO of the SV signal with a threshold, and identify whether the SV signal is a true SV signal or a false SV signal when the determined CNO is less than the threshold.

Abstract: An apparatus and a method. The apparatus includes an interference mitigation processor, including an input, and an output, the interference mitigation processor configured to sum n msec received correlators over m msec, and analyze the n msec correlators to reduce interference. The method includes summing, by an interference mitigation processor, n msec received correlators over m msec; and analyzing, by an interference mitigation processor, the n msec correlators to reduce interference.

Abstract: A system and method for providing asymmetrical filtering to improve performance in the presence of wideband interference is herein disclosed. According to one embodiment, a method for a global navigation satellite system (GNSS) receiver includes detecting wideband interference in a received target GNSS signal, and applying an asymmetric filter to the received target GNSS signal to mitigate the detected wideband interference.

Abstract: Embodiments include a method and apparatus for improving a position-velocity solution in GNSS receivers. A receiver of a mobile device includes an antenna that receives one or more signals from one or more satellites, a measurement layer produces range and range rate measurements dependent on the one or more signals, and a storage device stores historic satellite measurement states dependent on the range and range rate measurements. The receiver may further include a Kalman filter logic section may receive the range and range rate measurements, and to smooth computed motion of the mobile device. The storage device may store historic filter states. A filter adjustment logic section may detect a measurement layer error trigger, remove or de-weight errant information associated with the measurement layer error trigger, and cause the filter logic section to update a current filter state by iteratively applying the filter logic section to the historic filter states.

Abstract: Systems, methods and apparatuses for generating long coherent integrations of received global navigation satellite system (GNSS) signals are described. One method includes generating coherent 1 second I/Q correlations by at least two stages of summation starting with 1 millisecond correlated I/Q signal samples. Intermediate stage coherent I/Q correlations may be modified based on, for example, lack of carrier phase lock and/or the carrier signal-to-noise density (C/No). Such modifications include phase rotation. Energy/power amplitudes calculated from the coherent 1 second I/Q correlations may be used for improving multipath mitigation, the signal-to-noise ratio (SNR), and other GNSS receiver operations and functions.

Abstract: Systems, methods and apparatuses for multipath mitigation of received global navigation satellite system (GNSS) signals by using pattern recognition are described. One method includes summing correlations of received GNSS signals over time to generate a correlation window. The present system/method recognizes a pattern of a stored correlation window which matches the generated correlation window. The stored correlation window is one of a plurality of stored correlation windows, and each of the plurality of stored correlation window is stored with a corresponding range error. The stored range error corresponding to the matching stored correlation window is used to improve GNSS range measurement.

Abstract: An apparatus and a method. The apparatus includes an interference mitigation processor, including an input, an output, and configured to sum n msec received correlators over m msec, and analyze the n msec correlators to reduce interference. The method includes summing, by an interference mitigation processor, n msec received correlators over m msec; and analyzing, by an interference mitigation processor, the n msec correlators to reduce interference.

Abstract: Systems, methods and apparatuses for multipath mitigation in global navigation satellite system (GNSS) receivers are described. One method includes modifying the locally generated code in the GNSS receiver bit by bit in order to reduce offset peaks in the autocorrelation when receiving the satellite generated code signal. Such modified local codes may be pre-computed and stored or otherwise provided during reception. Moreover, the GNSS receiver may select whether or not to use the modified local code or the standard local code based on a selection criteria. Furthermore, multiple modified version of the same local code may be generated and/or stored in order to provide differing performance levels.

Abstract: Apparatuses and methods of manufacturing same, systems, and methods are described for combining received and correlated Global Navigation Satellite System (GNSS) signals and using the combined signal for improving GNSS reception in, inter alia, challenging environments. In one aspect, a first correlated GNSS signal and a second correlated GNSS signal are stored and then combined, and the combined signal is used to adjust reception of the first GNSS signal and/or the second GNSS signal. If the first and second correlated GNSS signals are stored by unequal time periods, time periods of one or both are added together until the total added first correlated GNSS signal is the same length of time as the total added second correlated GNSS signal. In order to properly combine the GNSS signals, gain/balancing factor(s) may be applied, the polarity of one or both may be flipped, etc.

Abstract: An apparatus, a method, a method of manufacturing an apparatus, and a method of constructing an integrated circuit are provided. The apparatus includes a memory and a processor configured to conduct acquisition of K values with N peaks, where K and N are integers; store the K values in the memory; select J of the N peaks and include the J peaks in track, where J is an integer less than or equal to N; combine acquisition and track non-coherent summations (NCSs) of coherent correlations in a metric; and form a measurement unless the metric indicates that the measurement should be abandoned.

Abstract: A method for use with a Global Navigation Satellite System (GNSS) receiver is provided. The method includes obtaining a first system time from a satellite of a first satellite navigation system, obtaining a second system time from a satellite of a second satellite navigation system, calculating a difference between the first system time and the second system time to obtain a number of leap seconds between Coordinated Universal Time (UTC) and the second satellite system.

Abstract: Apparatuses, systems, and methods for mitigating the effects of null zones on the measurements of Global Navigation Satellite System (GNSS) receivers are described. In one aspect, a GNSS receiver calculates both a filtered value of an integrated and summed value for a punctual correlator of a satellite signal (“the calculated filtered punctual correlator value”) and an average of integrated and summed correlator values for a plurality of noise/offset correlators of the satellite signal (“the calculated average noise/offset correlator value”). The GNSS receiver then calculates a signal energy loss parameter ESL of the satellite signal using the calculated filtered punctual correlator value and the calculated average noise/offset correlator value and processes the satellite signal measurement based at least on the signal energy loss parameter ESL and a predetermined threshold ThSL presently corresponding to the punctual and noise/offset correlators of the satellite signal.

Abstract: A Global Navigation Satellite System (GNSS) receiver includes a wideband signal correlator and a multipath mitigator. The wideband signal correlator generates wideband correlation signals of at least one of a plurality of GNSS signals with respect to corresponding locally generated code replica signals in which a bandwidth of the wideband signal correlation module is at least about 20 MHz. The multipath mitigator determines a Line of Sight (LOS) signal from the wideband correlation signals. The GNNS receiver may include a narrowband signal correlator to generate narrowband correlation signals of the at least one GNSS signal with respect to corresponding locally generated code replica signals in which a bandwidth of the narrowband signal correlation module is less than about 6 MHz. The multipath mitigator further corrects a range and range-rate measurement generated from the narrowband correlation signals based on a code phase and a carrier estimated based on the LOS signal.

Abstract: Embodiments include a method and apparatus for improving a position-velocity solution in GNSS receivers. A receiver of a mobile device includes an antenna that receives one or more signals from one or more satellites, a measurement layer produces range and range rate measurements dependent on the one or more signals, and a storage device stores historic satellite measurement states dependent on the range and range rate measurements. The receiver may further include a Kalman filter logic section may receive the range and range rate measurements, and to smooth computed motion of the mobile device. The storage device may store historic filter states. A filter adjustment logic section may detect a measurement layer error trigger, remove or de-weight errant information associated with the measurement layer error trigger, and cause the filter logic section to update a current filter state by iteratively applying the filter logic section to the historic filter states.

Abstract: A method, apparatus, and system for reducing memory and communication bandwidth requirements for digital signal samples in Global Navigational Satellite System (GNSS) receivers using an adaptive compression/decompression process are described.

Abstract: A global navigation satellite system (GNSS) receiver is provided. The GNSS receiver includes a front end processor (FEP) including a low power signaling path and a high power signaling path; an individual GNSS satellite processing (IGSP) module including a low power signaling path and a high power signaling path; and a module programmed to detect a carrier-to-noise density (C/No) of a signal received at the GNSS receiver and select at least one of the low power signaling path and the high power signaling path of the FEP and IGSP module based on the detected C/No.