Abstract: A method for detecting a false lock of a carrier tracking loop is described. The method includes obtaining an average output of each of one or more loop discriminators in a predetermined time period when the carrier tracking loop works in a first mode; and determining whether the carrier tracking loop is falsely locked when the absolute value of the average output of any of the one or more loop discriminators is greater than a respective threshold associated with the corresponding loop discriminator. The carrier tracking loop comprises the frequency-locked loop and the phase-locked loop in the first mode. The one or more discriminator loops may include a frequency-locked discriminator loop, a phase-locked discriminator loop, or a combination thereof.

Abstract: A method for assessing tracking loop quality of a satellite receiver is disclosed. The method includes obtaining a carrier-to-noise power density ratio (CN0) of a tracking loop which tracks a satellite signal; generating a statistical value associated with the CN0 based on output values from a discriminator of the tracking loop; and assessing a quality of the tracking loop based on the CN0 and the statistical value.

Abstract: A receiver associated with a positioning system is provided. The receiver comprises a tracking loop and a signal strength calculating module. The tracking loop is configured for tracking a positioning signal and generating an in-phase signal and a quadrature signal based on the positioning signal. The signal strength calculating module is configured for calculating a first evaluation value and a second evaluation value related to the positioning signal based on the in-phase signal and the quadrature signal, respectively, and determining a status of the tracking loop based on at least one of the first evaluation value and the second evaluation value.

Abstract: A satellite positioning component calculates a first position associated with a navigation receiver at a first time. An inertial positioning component calculates a second position associated with the navigation receiver at the first time. A combination positioning component provides a reference position, combines the first position and the second position into a third position based on distances among the first position, the second position, and the reference position, and locates the navigation receiver according to the third position.

Abstract: A satellite signal receiver and a method for updating ephemeris information thereby are disclosed. The receiver includes an instruction module, a signal processing module, and an update module. The instruction module is configured to send an instruction for updating ephemeris information at a set time interval. The signal processing module is configured to obtain corresponding satellite data. The update module is configured to update the ephemeris information according to the obtained satellite data in response to the instruction for updating ephemeris information.

Abstract: System and method for locating a satellite signal receiver are disclosed. The system includes a channel opening module, a signal processing module, and a positioning module. The channel opening module is configured for opening a predetermined number of channels based on a priority schedule. The signal processing module is configured for capturing and tracking satellite signals via the opened channels, and demodulating the tracked satellite signals to obtain corresponding satellite data. The positioning module is configured for determining a position of the satellite signal receiver based on the satellite data.

Abstract: A navigation bit boundary determination apparatus and a method therefor. In one example, the navigation bit boundary determination apparatus includes a satellite signal receiving module, a position receiving and clock calibration module, a detection module, a first calculation module, a second calculation module, and a determination module. The satellite signal receiving module is configured to receive a satellite signal from a satellite and record a local receiving time of the satellite signal. The position receiving and clock calibration module is configured to receive a time signal and a position of the navigation bit boundary determination apparatus. The detection module is configured to detect if ephemeris information of the satellite is available. The first calculation module is configured to calculate a coordinate of the satellite. The second calculation module is configured to calculate a transmitting time for the satellite signal.

Abstract: Managing pluggable modules of a network element includes receiving an approved pluggable module list for the network element. A pluggable module is received at the network element, and a component identifier of the pluggable module is determined. If the component identifier is on the approved pluggable module list, the pluggable module is approved for operation with the network element. If the component identifier is not on the approved pluggable module list, the pluggable module is rejected for operation with the network element.