15 results about "Gps satellites" patented technology

The present invention discloses a GPS signal management method and system based on artificial intelligence, which belongs to the field of artificial intelligence technology. The method and system include receiving original signals of multiple GPS satellites, performing preliminary screening and noise filtering preprocessing. The method builds a geographic environment model based on signal characteristics in combination with multiple sensors, and adjusts GPS parameters in real time according to environmental changes, so as to adapt to different environmental conditions and improve the adaptability of the signal. The method also performs dynamic signal optimization and enhancement through an intelligent antenna array, and can dynamically adjust the antenna according to the signal strength and the predicted multi-path signal state, so as to further enhance the stability of the signal. The optimized and enhanced GPS signal and the data of multiple sensors are fused for high-precision positioning. By fusing the GPS signal and the geographic environment model information data, the error correction of the initial position estimation can be performed, and the fused position estimation is matched and verified with the geographic environment model, so as to significantly improve the positioning accuracy.

A method of updating a clock associated with an autonomous vehicle includes determining, at a processor, a sensor-based position of the autonomous vehicle, which is determined based on data from one or more sensors and based on a digital map. The method also includes determining, at the processor, a global positioning system (GPS) computed position of the autonomous vehicle and a GPS time. The GPS computed position and the GPS time are determined based on a plurality of GPS signals received from GPS satellites. The method further includes comparing the sensor-based position to the GPS computed position to determine whether the sensor-based position is within a threshold distance from the GPS computed position. The method also includes updating the clock associated with the autonomous vehicle based on the GPS time in response to a determination that the sensor-based position is within the threshold distance from the GPS computed position.

The present invention discloses a method and system for determining real-time precise orbits and clock offsets of LEO in orbit based on PPP-B2b enhancement, belonging to the technical field of high-precision autonomous orbit determination and clock offset estimation for low-earth orbit satellites. The present invention corrects the orbits and clock offsets of BDS-3 / GPS satellites by using the enhancement information broadcast by the B2b signal of Beidou-3. Under the support of regional BDS-3 / GPS enhancement information, when there are new BDS-3 / GPS tracking satellites, before measurement update, the epoch-to-epoch clock offset variation obtained by using the carrier phase time difference method is used as two orbit determination filtering clock offset parameters for constraint, and the receiver clock offset and undifferenced floating ambiguity parameters are separated in orbit in real time; finally, the precise orbit of LEO and the undifferenced floating ambiguity parameters output by orbit determination filtering are substituted into the phase observation equation to calculate the precise clock offset of the BDS-3 / GPS receiver. The present invention is applicable to the situation where there is only regional GNSS enhancement information support and is less affected by orbit maneuvers.

The application discloses a system for verifying the time precision of a TB time stamp recording device and a method thereof, which comprises a GPS antenna, a GPS receiver module, a microprocessor and a NAND gate; the GPS antenna is used for receiving signals transmitted by GPS satellites and transmitting the signals to the GPS receiver module; the GPS receiver module is used for outputting time service second pulses to the microprocessor and the NAND gate respectively after receiving the signals transmitted by the GPS antenna; the microprocessor is used for outputting a pulse control signal to the NAND gate according to a time information control instruction after receiving the time service second pulses transmitted by the GPS receiver module; and the NAND gate is used for outputting corresponding second pulses to the TB time stamp recording device for recording according to the received pulse control signal. The application is used for solving the technical problem that the precision of the TB time stamp recording device cannot be verified, so as to achieve the purpose of ensuring the precision of the TB time stamp recording device.

A global positioning system (GPS) receiver may include an antenna configured to receive GPS signals from GPS satellites, a radio frequency (RF) front end configured to pre-process signals received by the antenna, a demodulator / converter configured to perform demodulation and analog-to-digital conversion of output signals received from the RF front end, a clock configured to provide a consistent clock signal, and a digital signal processor configured to receive the clock signal and make time and code measurements associated with determining a location of the GPS receiver based on the signals received by the antenna. The GPS receiver may be configured to eliminate reflected or indirect signals from the time and code measurements.

A navigation system and method of use utilizes waypoints to guide people around urban environments, detecting a presence of a cellular phone and guides / navigates the user to destinations. The process can be an add-on to the cellular phone. The process focuses on the task of detecting and navigating even in situations in which Global Positioning Systems (GPS) cannot provide this information, such as when the person is indoors or in crowded urban areas where line of site to the GPS satellites is impractical and / or unavailable.

An emergency response activation (ERA) system comprising a graphical user interface (GUI) located at a dashboard of a vehicle, four or more global positioning system (GPS) satellites, a driving center, a 5G-communication control tower, an emergency response center (ERC) system, and 5G-enabled unmanned semi-autonomous aerial vehicles (UAVs). The GUI comprises distinct emergency activation buttons (EABs), each associated with a specific emergency. The GPS satellites provide a precise location of the vehicle associated with the specific emergency. The driving center receives information of the specific emergency via the GPS satellites once the EAB is pressed by an occupant of the vehicle. The 5G-communication control tower transmits the information from the driving center to a specific emergency response center via the GPS satellites. The ERC system dispatches emergency response personnel from the specific emergency response center at the precise location of the vehicle.

The invention relates to an LEO-GNSS precise point positioning method based on system deviation independent estimation. The method comprises the following steps: acquiring satellite observation data and product data of global navigation satellite systems (GNSS) satellites and low earth orbit (LEO) satellites, wherein the GNSS satellites comprise GPS satellites and BDS satellites; based on the acquired satellite observation data and product data, estimating a general state parameter by utilizing pseudo-range single point positioning (SPP), the general state parameter including an inter-system deviation (ISB) parameter of the GNSS and each LEO satellite in the LEO satellites; constructing a PPP measurement model at least partially based on the general state parameters, including constructing measurement equations for GPS satellites, BDS satellites and LEO satellites respectively, and linearizing the simultaneous measurement equations to obtain an observation coefficient matrix expression; and estimating a floating point solution of the PPP metrology model to determine the location of the receiver. Therefore, abnormal positioning caused by processing delay difference of different LEO satellite signals is avoided, and LEO enhanced PPP convergence efficiency is improved.

We provide information that will help you improve your score. [Solution] The golf navigation device 20 is a portable golf watch or the like that uses radio waves from GPS satellites and comprises an acquisition unit 21, a storage unit 24, a calculation unit 23, and a display unit 25. The acquisition unit 21 acquires information indicating the speed of the greens on that day. The storage unit 24 stores reference data that shows the correspondence between the user's swing amplitude and the distance the ball will roll when hit with that swing amplitude, for each green speed. The calculation unit 23 calculates the swing amplitude that the user should use on the greens on that day, according to the distance to the pin, by referring to the storage unit 24 based on the information acquired by the acquisition unit 21. The display unit 25 displays the swing amplitude that the user should use on the greens on that day using a color gradient 25C, based on the result calculated by the calculation unit 23.

The present application relates to a LEO-GNSS precise point positioning method based on system bias independent estimation. The method can include: obtaining satellite observation data and product data of global navigation satellite system (GNSS) satellites and low earth orbit (LEO) satellites, the GNSS satellites including GPS satellites and BDS satellites; estimating rough state parameters based on the obtained satellite observation data and product data using pseudorange point positioning (SPP), the rough state parameters including inter-system bias (ISB) parameters of each of the LEO satellites and the GNSS satellites; constructing a PPP measurement model based at least in part on the rough state parameters, including constructing measurement equations for the GPS satellites, the BDS satellites and the LEO satellites respectively, and linearizing the measurement equations to obtain an observation coefficient matrix expression; and estimating a float solution of the PPP measurement model to determine the positioning of the receiver. In this regard, the positioning abnormality caused by the difference in signal processing delay of different LEO satellites is avoided, and the convergence efficiency of LEO enhanced PPP is improved.

To provide a navigation system that can receive signals from Japanese GPS satellites without requiring any special equipment, ensuring high accuracy, safety, and reliability. [Solution] The system is characterized by comprising: a receiving function unit 320 that receives signal information transmitted from Japanese GPS satellites 200; a map information storage function unit 330 that stores map information provided by the Geospatial Information Authority of Japan; a location information generation function unit 340 that generates predetermined location information by referring to the map information provided by the Geospatial Information Authority of Japan stored in the map information storage function unit 330 and the signal information received by the receiving function unit 320; a reflection function unit 350 that reflects the predetermined location information generated by the location information generation function unit 340 onto arbitrary map information; and an output function unit 360 that displays or outputs the map information onto which the location information has been reflected by the reflection function unit 350.

The present invention provides a tunnel positioning device based on the global satellite positioning and navigation system, characterized in that: it includes a GNSS receiver connected to GNSS satellites, the GNSS receiver is connected to a GNSS forwarding controller through a GNSS simulator, and the GNSS forwarding controller is connected in series with a number of GNSS repeaters in the tunnel through optical fibers. The GNSS receiver receives satellite signals, the GNSS simulator simulates and generates satellite positioning data of the positions of each GNSS repeater, and sends it to each GNSS repeater through the GNSS controller. The GNSS repeaters in the tunnel convert it into standard GNSS satellite signals, and the trains and the GNSS receivers of the positioning terminals receive the simulated satellite signals to achieve the positioning of trains and personnel in the tunnel. The present invention realizes the positioning of trains and handheld terminals in the tunnel relying on Beidou and GPS satellites by simulating satellite positioning signals, without the need to modify the existing satellite positioning terminals of vehicles and personnel, providing an effective means for the full coverage positioning of the railway GNSS satellite positioning system.

The present disclosure relates to an occupancy sensor system for a vehicle. The system includes a central processing unit (CPU) electrically connected to a power source of the vehicle, one or more sensors for inputting raw data into the CPU, an electronic device with a user interface, and a wireless communications bus connected to the CPU. The CPU compares the raw data received from the sensors with a predetermined safety threshold and transmits an alert to the electronic device via the wireless communications bus if the raw data is not within the safety threshold. The system further includes a global positioning system (GPS) transceiver coupled to the vehicle for receiving radio transmissions from GPS satellites, and a radio-frequency identification (RFID) reader chip.

A global positioning system (GPS) receiver may include an antenna configured to receive GPS signals from GPS satellites, a radio frequency (RF) front end configured to pre-process signals received by the antenna, a demodulator / converter configured to perform demodulation and analog-to-digital conversion of output signals received from the RF front end, a clock configured to provide a consistent clock signal, and a digital signal processor configured to receive the clock signal and make time and code measurements associated with determining a location of the GPS receiver based on the signals received by the antenna. The GPS receiver may be configured to eliminate reflected or indirect signals from the time and code measurements.

The present disclosure relates to an occupancy sensor system for a vehicle. The system includes a central processing unit (CPU) electrically connected to a power source of the vehicle, one or more sensors for inputting raw data into the CPU, an electronic device with a user interface, and a wireless communications bus connected to the CPU. The CPU compares the raw data received from the sensors with a predetermined safety threshold and transmits an alert to the electronic device via the wireless communications bus if the raw data is not within the safety threshold. The system further includes a global positioning system (GPS) transceiver coupled to the vehicle for receiving radio transmissions from GPS satellites, and a radio-frequency identification (RFID) reader chip.