112 results about "Ground segment" patented technology

A semiconductor package includes a substrate, a semiconductor die, a package body, an electromagnetic interference shield, a dielectric structure and an antenna element. The substrate comprises a grounding segment and a feeding point. The semiconductor die is disposed on the substrate. The package body encapsulates the semiconductor die. The electromagnetic interference shield is formed on the package body. The dielectric structure encapsulates the electromagnetic interference shield. The antenna element is formed on the dielectric structure and electrically connecting the grounding segment of the substrate and the feeding point.

The invention discloses an air-ground integrated network architecture based on a software defined network and network function virtualization. According to the system architecture, the entire network consists of a ground network part and a space network part, and is divided in a unified manner into a management layer, a control layer and a forwarding layer. The management layer is responsible for registering and querying the network status and network service functions of the ground part and the space part in the air-ground integrated network and making routing, security, billing, service call and resource management strategies. The control layer consists of a ground part and a space part, and is responsible for controlling data forwarding according to the strategies of the management layer and collecting the information of network links and network service functions. The forwarding layer consists of a ground part and a space part, and is responsible for forwarding data and providing network service functions. The architecture uses a software defined network and an idea of network function virtualization, and efficient information transmission control and on-demand satellite service providing are realized in an air-ground integrated network.

The invention discloses a relay transmitting system used for an unmanned helicopter, which rises the height of the unmanned helicopter to promote the transmission quality of signals in a spatial channel, and can transmit the relay with a weak signal even in the distance, thus increasing the communication distance; the invention is characterized by high sensitivity, wide dynamic range, broad transmitting band and good anti-interference performance. The invention comprises two main parts of an airborne part and a ground part, wherein, the airborne part is carried with a relay transmitting subsystem and consists of four modules of an airborne receiving antenna, an airborne relay transmitting module, a broad band filter and an airborne transmitting antenna; and the ground part comprises a ground receiving subsystem including three modules of a ground receiving antenna, a vehicle low noise amplifier and a ground receiving module. The system of the invention is simple, high-efficient and reliable and has low cost. By combining with the flexibility and mobility of the unmanned helicopter, the system of the invention can be applied in the fields of television and broadcasting, etc.

The invention provides a global real-time Internet of things (IOT) constellation system. The system includes a space segment including a plurality of low-orbit satellites that are interconnected through inter-satellite links, a ground segment which is used for completing an operation control function and a data distribution and recovery processing function. The ground segment includes a pluralityof constellation gateway stations. The system also comprises a user segment which is used for collecting sensing data and comprises a plurality of user terminals. The constellation gateway stations ofthe ground segment and the user terminals of the user segment communicate with the low-orbit satellites of the space segment through respective links. The system has the advantages that the system isfor the cloud, network and end system level designs of global wide-area space-based IOT applications, and the IOT new connection and management capabilities of multiple industrial mass applications are achieved.

A space segmentation method for 3D point clouds is disclosed. A space segmentation method for 3D point clouds includes equally segmenting a space of the 3D point clouds into a plurality of grid cells; establishing a base plane corresponding to a ground part of the space of the 3D point clouds; accumulating points of all grid cells located perpendicular to the base plane in a grid cell of the base plane; and segmenting the grid cell in which the points are accumulated into an object part and a ground part according to the number of accumulated points.

The present invention provides a heterogeneous spacecraft network including a network management architecture to facilitate communication between a plurality of operations centers and a plurality of data user communities. The network management architecture includes a plurality of network nodes in communication with the plurality of operations centers. The present invention also provides a method of communication for a heterogeneous spacecraft network. The method includes: transmitting data from a first space segment to a first ground segment; transmitting the data from the first ground segment to a network management architecture; transmitting data from a second space segment to a second ground segment, the second space and ground segments having incompatible communication systems with the first space and ground segments; transmitting the data from the second ground station to the network management architecture; and, transmitting data from the network management architecture to a plurality of data user communities.

A method for autonomous controlling of a remote controlled aerial vehicle, wherein a flight operator commands the aerial vehicle, comprising the steps of: initializing a data link between the aerial vehicle and a ground segment; determining an operation condition of the data link during use of the data link; and issuing at least one autonomous controlling command, if, as a result of the determining, a loss of the data link is determined.

A method is provided for detecting road lane markers using a light-based sensing device. Reflectivity data is captured using the light-based sensing device. A light intensity signal is generated based on the captured reflectivity data. The light intensity signal is convolved with a differential filter for generating a filter response that identifies a candidate lane marker region and ground segment regions juxtaposed on each side of the candidate lane marker region. A weighted standard deviation of the data points within the identified candidate lane marker region and weighted standard deviation of the data points within the ground segment regions are calculated. An objective value is determined as a function of the respective weighted standard deviations. The objective value is compared to a respective threshold for determining whether the identified candidate lane marker region is a lane marker.

A direct broadcasting satellite (DBS) system features a capability of coherently combining amplified signals powers from various broadcasting transponders without modifying the satellite segment. Organized DBS transponders would function as an equivalent DBS transponder with a higher EIRP. Power allocations are via a mechanism in an uplink transmitter in a ground segment and power combining mechanisms are in user receivers in a user segment. Specifically, the transmitter generates mixtures of input signals by using Wavefront-Multiplexing and transmits wavefront-multiplexed (WFM) signals which are sent concurrently through multiple parallel channels of transponders in the satellite segment. A receiver in the user segment separates the mixtures of received amplified WFM signals and coherently combines amplified components by various transponders by adaptive equalizing and Wavefront De-Multiplexing processors. The WFM signal mixtures allow an operator, or automated system, at the transmitter to dynamically allocate the equivalent transponder powers according to continuously changing demands.

The invention relates to grounding vibration experimental method and system of a steel catenary riser. The grounding vibration experimental method of the steel catenary riser comprises the following steps of, firstly, arranging a flume, paving clay which has close physical property and mechanical property with prototype seabed soil at the bottom of the flume, arranging a wave absorbing region at the end of the flume, arranging a water outlet on the flume above the wave absorbing region, and simulating an ocean current in a riser grounding region in a mode of circulating refluxing of effluent, wherein the water level in the flume is higher than the upper surface of the clay; secondly, with the application of a method of truncation simulation, arranging a riser grounding segment model in the limited flume, applying the vertical load and the horizontal lateral load at one end of the riser grounding segment model, and simulating grounding vibration of the steel catenary riser caused by motion of a floating body and a seabed groove formed with pipe-soil interaction; and thirdly, through an acceleration sensor and a strain gauge which are arranged on the riser grounding segment model at intervals, collecting a response signal of grounding vibration of the model, thereby influences on grounding vibration of the steel catenary riser of the seabed surface soil body property and different flow rate damping conditions are acquired.

The invention relates to a power mooring observation platform system, which consists of a ground part, an aerial platform part and interconnected mooring cables, wherein the ground part comprises a power supply system, a ground control system and an image receiving and processing system; the ground control system is connected with the mooring cables and wirelessly communicates with the aerial platform part; the image receiving and processing system wirelessly communicates with the aerial platform part and is used for receiving and processing image information; the aerial platform part comprises an aerial power supply system, an aerial control system, a power system, a monitoring system and a fixed connector; the aerial power supply system is connected with the mooring cables and connected with the power system, the aerial control system and the monitoring system; the aerial control system wirelessly communicates with the ground control system and is connected with the power system; and the monitoring system is used for acquiring the image information and wirelessly communicates with the image receiving and processing system of the ground part. Control and power are provided for an aerial platform by adopting the mooring cables, so the system is strong in flexibility and strong in maneuverability, and does not require landing supply.

The invention discloses an urban GNSS navigation quality evaluation and predication method and system. The method comprises the following steps: obtaining position of a satellite at each moment through ephemeris; selecting a road network simulation point to carry out static analysis, and determining satellite signal shield situations on the road network simulation point; selecting a road network path for dynamic analysis, and determining satellite signal shield situations on the road network path; selecting a corresponding precision evaluation model and a corresponding precision factor; under the condition of a multi-mode navigation satellite positioning satellite source, through the precision evaluation model on the path, optimizing selection of satellites; with user positioning accuracy requirements and multipath effect being combined, determining navigation positioning quality comprehensive evaluation factors; and carrying out dynamic path planning on the path trajectory. According to the urban GNSS navigation quality evaluation and predication method and system, through high-precision basic 3D model simulation, a high-precision space satellite orbit, a ground segment multi-path effect model, a navigation positioning quality evaluation model and a sequence quality prediction mechanism are established.

A fault management system is directed to the access network part of a communications network where terminating lines in the form of pairs of copper wires extend from a local switch through a series of nodes to terminal equipment provided for user of the network. Each night, a test head performs a series of tests on each of the terminating lines. The results of the tests are transmitted to an access network management system where they are analyzed with respect to a set of parameters to identify characteristics that would indicate that a fault is likely to occur on the associated circuit within a predetermined period e.g. 1 year. Further analysis can then be carried out to establish the probability of the fault actually occurring and/or whether the potential fault analyzed is going to occur in either the underground or the over-ground part of the network. Further analysis determines relative costs of repair for circuits or network elements in which faults or potential faults have been identified.

The invention discloses an unmanned aerial vehicle anti-collision system and an anti-collision method thereof and relates to the technical field of unmanned aerial vehicles. The unmanned aerial vehicle anti-collision system comprises an unmanned aerial vehicle, a central processing unit, a ground control unit, a distance measuring sensor, an inertial sensor and a wireless communication module. The wireless communication module comprises a vehicle-mounted part and a ground part. The central processing unit, the distance measuring sensor, the inertial sensor and the vehicle-mounted part of the wireless communication module are all installed on the unmanned aerial vehicle. The ground part of the wireless communication module is installed on the ground control unit. The ground control unit is connected with the unmanned aerial vehicle through the wireless communication module and controls the unmanned aerial vehicle to fly. The anti-collision unmanned aerial vehicle system aims at solving the problems that an unmanned aerial vehicle anti-collision system in the prior art is complex in structure, high in manufacturing cost and low in safety performance, and is low in manufacturing cost, simple in structure and high in safety performance.

This invention relates to a real time playing method for the navigation locating information strengthened internet based on the P2P technology including the following steps: networking the reference stations and the central station in the ground part to transmit various kinds of difference correction data, setting up P2P network among the navigation locating devices and taking them as the ordinary nodes and setting up node lists among them, the central station is connected with the P2P server by the P2P network after using the fire wall, said ordinary nodes and the reference stations get the navigation information from the locating system, the reference stations compute various kinds of difference correction data based on their own positions and satellite locating data to be sent to the central station, which forms navigation location strengthened information and plays it in the P2P network by the P2P server and the locating device receives it and regulates its own navigation locating information.

Methods and systems enhance the accuracy of the global positioning system (GPS) using a low earth orbiting (LEO) satellite constellation. According to embodiments described herein, GPS data is received from GPS satellites at a GPS control segment and is used to create GPS correction data to be utilized by user equipment to correct errors within the GPS data. The GPS correction data is transmitted from the GPS control segment to a LEO ground segment, where it is uplinked to the LEO satellite constellation. To account for bandwidth constraints and minimize any performance degradation of the LEO satellites, the GPS correction data is broadcast to earth on a subset of the total number of available spot beams. The subset of spot beams is selected in part according to satellite angular velocity, bandwidth constraints, and message latency estimates.

The invention discloses a navigation information flow system simulating the operation of a satellite navigation system. The navigation information flow system comprises a spatial segment i satellite models, a ground segment k monitoring station models, a master station model, j injection station models, a satellite orbit simulation module and a scheduling planning service module, wherein the satellite models receive the ground navigation data, processes and sends navigation data to the monitoring station models when the related equipment is available, the satellite orbit simulation module calculates the visual satellite models of the monitoring station models and collects the observation data, receives the observational information of the visible satellite models when monitoring equipment is available and sends the observation information to a master control station when a communication network is available, the master station model receives the observation information and processes and generates navigation data information when the related equipment is available to dispatch to related injection station models, and the injection station models receive the navigation data information and sends the navigation data information to target satellite models when both the business-related equipment and the communication network are available.

The invention relates to a dual-frequency antenna, which comprises a grounding segment, a low-frequency radiation part and a high-frequency radiation part. The grounding segment comprises a connecting end and a grounding end opposite to the connecting end. The low-frequency radiation part is connected with the connecting end of the grounding segment so as to work at the low-frequency band (2400 MHz to 2500 MHz), and comprises a signal feed end. The high-frequency radiation part works at the high-frequency band (4900MHz to 5900MHz), extends outwards from the signal feed end of the low-frequency radiation part, and defines a slot opening together with the low-frequency radiation part. The slot opening is coupled with the low-frequency radiation part and the high-frequency radiation part, thereby increasing the working bandwidth of the antenna at the high-frequency band.

One aspect provides an antenna. The antenna, in this aspect, includes a grounded segment extending from a metal chassis of an electronic device, and a feed portion coplanar with the grounded segment, the grounded segment and feed portion jointly tuned to cause the antenna to communicate in selected bands of frequencies.

The invention discloses an automatic train driving system based on UWB communication and distance measurement. The automatic train driving system comprises a vehicle-mounted part and a ground part, wherein the vehicle-mounted part is arranged on a train system and a track system thereof and is used for acquiring train sensing information at least comprising train location, speed and train serial numbers, the train sensing information is transmitted by virtue of a UWB communication way, the ground part is used for assisting the train to acquire the communication train information, for performing the supervision and control and assisting the dispatching personnel to manage the train; the automatic train driving system also comprises a UWB distance measurement module which is used for measuring a distance between two trains and between the train and a station; the driving system comprises a judging module and a control module. When an automatic driving train has failure, the train can runto a close station to be repaired at a relatively low speed, so that the failure train is prevented from influencing the trains running normally on the whole line, and convenience is provided for themaintenance work of the maintenance personnel at the station.

The invention discloses a guidance system for vessel harboring, which comprises a space segment, a ground segment and an application segment, wherein the space segment comprises a navigation and location satellite, a mobile communication satellite and a telemetering remote sensing satellite in the stratosphere; the ground segment comprises a ground gateway station and a command center system; theapplication segment is a vessel terminal system; and location information, speed information and front channel information of the vessel obtained by three kinds of satellites during navigation are sent to the command center system through the ground gateway station, and navigation conditions, berth information and available berth information of the vessel are obtained through analysis. When the vessel sends a request of harboring to the command center system, the command center system sends guiding orders to the harboring vessel through the mobile communication satellite immediately, the harboring vessel is guided to berth, and the computer graphics (CG) technology is supplemented to master harbor berthing conditions, monitor anchoring and line mooring conditions of the vessel after berthing, and send safety warning information.