34 results about "Meteor burst communications" patented technology

The invention discloses a construction method of a meteor trail communication channel module, mainly solving the problem of seamless compatibility between the traditional channel model with the simulation of the traditional communication transmission mechanism and a key technology. The construction method comprises the following steps of: firstly, dividing a meteor trail communication channel into a sparse underdense subchannel, an underdense multi-path subchannel, an underdense cluster subchannel, a meteor shower subchannel, an over-dense meteor subchannel without Rayleigh fading and an over-dense subchannel containing Rayleigh fading; respectively constructing channel models, wherein the high precision of each subchannel approaches to the physical characteristics of actual representative channel; then combining the six subchannels according to the actually measured statistical probability; and finally, acquiring a channel computer model capable of embodying various physical characteristics of a practical meteor trail channel. The invention has the advantages of simple calculation, easy expansion, easy modification and seamless compatibility link simulation and can improve the communication quality of the meteor trail.

The present invention discloses a multi-channel meteor trail channel simulator, and relates to the transmission environment simulation equipment of meteor trail burst communication channel in the field of communication. The channel simulator comprises a digital control attenuator, a power distribution / synthesis device, a channel simulation unit, a power supply and other components. When in use, the channel simulator is connected in the meteor trail communication channel in series, to simulate the characteristics of the actual meteor trail channel, which comprise the appearance of random burst and the signal intensity of exponential decay; and the channel simulator can be used for simulation testing of various technical indicators of the meteor trail communication channel. The channel simulator also has the advantages of high degree of integration, simple circuit, small size, convenient use, stable and reliable performance, and so on, and is in particular suitable for the meteor trail channel simulator on the occasions of the joint testing of the system, the transmission threshold testing of the equipment, the capacity testing of the network protocol, and so on in the meteor trail communication system network under the condition of the laboratory.

The invention discloses a novel multichannel meteoric trail channel simulator, which is a simulation device of a multichannel meteoric burst communication channel transmission environment in the field of communication. The novel multichannel meteoric trail channel simulator is composed of a multiplexer switch, a power distribution synthesis unit, a splitter and combiner unit, a numerical control attenuator, a control unit, a communication interface unit, a channel switching interface unit, a channel simulation processing unit, a storage unit, a power supply and other components, and is serially connected in devices of a meteoric trail communication system to simulate the influence of an actual meteoric trail channel on a signal, so as to test and check the performance indexes, link performance, networking functions and the like on newly researched meteoric trail communication devices in a laboratory environment. The novel multichannel meteoric trail channel simulator disclosed by the invention further has the advantages of high integration degree, small volume, convenient use, stable performance and the like.

The invention discloses a construction method of a meteor trail communication channel module, mainly solving the problem of seamless compatibility between the traditional channel model with the simulation of the traditional communication transmission mechanism and a key technology. The construction method comprises the following steps of: firstly, dividing a meteor trail communication channel into a sparse underdense subchannel, an underdense multi-path subchannel, an underdense cluster subchannel, a meteor shower subchannel, an over-dense meteor subchannel without Rayleigh fading and an over-dense subchannel containing Rayleigh fading; respectively constructing channel models, wherein the high precision of each subchannel approaches to the physical characteristics of actual representative channel; then combining the six subchannels according to the actually measured statistical probability; and finally, acquiring a channel computer model capable of embodying various physical characteristics of a practical meteor trail channel. The invention has the advantages of simple calculation, easy expansion, easy modification and seamless compatibility link simulation and can improve the communication quality of the meteor trail.

The invention discloses a meteoric trail communication modeling simulation system which relates to a meteoric trail burst communication system simulation apparatus in the field of communication. The meteoric trail communication modeling simulation system comprises parts: a channel simulator, a transmitter, a receiver, a data source generator, a counter and the like. The meteoric trail communication modeling simulation system has authenticity, can simulate year, month and day change laws of a meteoric trail, and can reflect a topological structure and an operation condition of an actual meteoric trail communication network; the meteoric trail communication modeling simulation system has expandability, and can simply and conveniently construct network forms with different scales and topological structures; and the meteoric trail communication modeling simulation system has maneuverability, is provided with an excellent human machine interface and is convenient to change simulation parameters and observe and display a result. According to the simulation system disclosed by the invention, by loading a link, an internetworking protocol and the like of the meteoric trail communication network, the entire communication process can be efficiently and rapidly simulated. The meteoric trail communication modeling simulation system is particularly suitable for evaluating performance of the meteoric trail communication link and network, a meteoric trail communication network protocol system is optimized, and basis is provided for building and use of the meteoric trail communication network.

A system and method for communications between a plurality of shipping containers and a central monitoring station using a meteor burst communication method is provided. The system may also be used as a redundancy scheme as a backup communications device for a primary satellite or cellular channel. The channel also uses an error protection protocol, and proposes a method to conserve battery power for the system.

The invention discloses a link recommendation method based on a meteor trail communication network, which belongs to the technical field of communication. The traditional communication link recommendation is based on the connectivity between two sites in the network topology, but when there are multiple reachable links between the start site and the end site, the connectivity alone cannot meet the requirements. On the basis of network construction and transmission calculation, the present invention refers to the network planning table, combines link transmission parameters, and comprehensively considers link connectivity and link transmission speed, and calculates the effective communication between two stations in the meteor trail communication network. It provides a reference for the screening of information sending routes in the meteor trail communication network.

The invention discloses an adaptive variable rate device for a burst asymmetric channel, which relates to a burst asymmetric communication system in the field of wireless communication, especially a meteor trail communication system, which can be completed in a short time according to channel fading Rate-adaptive information transmission. The device includes a demodulator, a modulator, a variable rate protocol control unit, a signal-to-noise ratio estimation unit and a power supply; the present invention mainly completes the signal-to-noise ratio estimation of the received signal and sends it to the opposite end through a channel, according to the signal-to-noise ratio of the opposite end and The transmission rate is controlled by channel fading characteristics. This device makes the entire communication rate adaptively match the channel condition, makes the communication rate close to the instantaneous channel capacity, thereby improving the information throughput of the wireless communication system; Signal level requirements, improve the utilization of small signals, greatly shorten the average waiting time of communication.

The invention discloses a meteor trail communication channel simulation method, system and device. The method includes: obtaining the duration of the meteor trail and the interval time of the meteor trail; The switch signal corresponding to the interval time of the meteor trail, wherein, the switch signal is an open signal in the time period corresponding to the duration of the meteor trail, and the time period corresponding to the interval time of the meteor trail is Turn off signal; send the switch signal to the radio frequency switch module, so that the radio frequency switch module controls the on-off of the duplex communication channel between the first station and the second station according to the switch signal. Implementing the method, system and device of the present invention, based on the duration of the meteor trail and the interval time of the meteor trail, the switch signal for controlling the duplex communication of the radio station is generated, which can simulate the characteristics of the variable parameter channel, and then provide for improving the performance test of the radio station. Assure.

The invention discloses a meteor burst communication protocol processor based on the estimation of signal-to-noise ratio, and relates to a meteor trail signal channel protocol processor with the strong anti-burstiness and the rapid fading resistance, and belongs to the communication field. The processor comprises a packetizer, an organization and sending device, an encoder, a sending selector, a signal channel detector, a rapid synchronizer, a decoder, a receiving and combination device, an unpacketizer, a receiving responder and a sending responder. The processor firstly estimates the signal-to-noise ratio before sending the data, and determines if the encoding and the punching is required; a receiving terminal adopts the technology of the data receiving and combination to carry out the self-decryption or the joint decryption on the received data and complete the processing of the meteor burst communication protocol. The invention also has the advantages of high integrated degree, simple circuit, small volume, convenient application and stable and reliable performance. The invention is especially suitable for the meteor trail signal channel protocol processor with the strong anti-burstiness, the rapid fading resistance and the short signal channel existence period.

The invention discloses a method for realizing meteor trail communication network simulation based on a GIS (Geographic Information System) system, belonging to the technical field of communication. In the traditional meteor trail communication network simulation, the function is limited to predicting network connectivity. In order to further provide systematic decision support, this method is proposed. The method consists of three main modules: channel simulation, transmission parameter calculation, and decision analysis. On the basis of the planned meteor trail communication network in the GIS platform, the above three modules are run in sequence to output channel simulation data, transmission parameter data and Decision-making report, convenient operation and intuitive results. The invention realizes the software simulation of the meteor trail communication network, has a good man-machine interface, can efficiently and quickly simulate the information transmission in the whole network, and provides a basis for the construction and use of the meteor trail communication network.

The invention discloses a multi-rate modem device based on burst communication, which relates to a burst communication system in the field of meteor trail communication, and can complete timing synchronization of received signals in a short time. It includes a modulator, a demodulator and a power supply; the present invention mainly completes the codec, modulation and demodulation of transmission information. The present invention proposes two innovations: multi-rate parallel demodulation technology and fast timing synchronization technology. Through the analysis of the above-mentioned innovations, it is proved that the device can work reliably in the meteor trail burst communication system. Through practical application, it is proved that this device has good practical effect.

The invention discloses a full-duplex meteor trail communication device based on a single antenna, which relates to the field of meteor trail communication. The invention includes link controllers, modems, transceivers, power amplifiers and duplexers. The present invention adopts a duplexer with high power bearing, small incoming loss and high transceiver isolation, and combines the receiving channel and the transmitting channel into one full-duplex channel under the premise of ensuring the communication performance of the system. The full-duplex communication between different meteor trail communication devices can be completed, thereby reducing the number of antennas, reducing the requirements for the antenna erection site, and shortening the opening and erection time of meteor trail communication. The invention has the characteristics of high power bearing, high transceiver isolation, simple and convenient erection, high degree of integration, stable and reliable performance, etc., and is especially suitable for meteor trail communication occasions where the antenna erection site is limited or there is a time requirement for the erection.

The invention discloses an ultra-short wave multi-mode over-the-horizon modem, method and communication equipment, belonging to the technical field of communication. The modem of the present invention includes FPGA, and FPGA is used to realize link control module, modulator, pattern recognition module and demodulator. The invention can make full use of multiple channel resources, compensate for the short-distance communication weak area of ​​meteor trail communication, and can be applied to 0-2000km multi-mode self-adaptive wireless communication systems.

The invention discloses a meteor trail communication self-interference suppression device and method, belonging to the technical field of communication. The self-interference suppression device of the present invention includes a sending coupler, a variable attenuator, an intelligent interference reconstruction unit, a combiner and a receiving coupler. In order to improve the communication efficiency, the meteor trail communication system mostly adopts the method of frequency division duplexing. Since it works in the VHF frequency band, and the transmission power usually reaches the kilowatt level, in order to ensure the system performance, only a bulky bandpass filter can be used. Conducive to the mobility and cost of the system, the present invention can be directly applied to the meteor trail communication system, installed between the transceiver channel and the ring assembly, to suppress the self-interference signal, which can greatly reduce the self-interference signal in the receiving channel and reduce the receiving filter The indicator pressure of the device can solve the problem of system volume bottleneck.

The invention discloses a meteoric trail communication based motorized command system training support device. The meteoric trail communication based motorized command system training support device comprises a receiving unit, a link unit, a channel unit, a sending unit, a channel control unit and a networking control unit. The meteoric trail communication based motorized command system training support device can generate a meteoric trail channel with time delay and error code typical characteristics. The meteoric trail passing process is complex, the search difficulty of channel characteristics is relatively great, a meteoric trail channel with the typical characteristics is generated, and the pertinence to channel research is enhanced; the networking structure of the meteoric trail communication can be simulated in system level, so that the deficiency that the former simulation device not can be connected between a master station and a slave station is made up; the meteoric trail communication based motorized command system training support device can realize control the working mode of an external terminal and can realize control of a whole communication system, so that the deficiencies of single function and poor systematicness of the former simulation devices are made up.