45 results about "Radio fix" patented technology

The invention provides a method and device for positioning a near-field interference source of a high-frequency radio fixed direction finding station. The method comprises the steps of determining a distance range of near-field interference sources which the direction finding station can position according to the radius of a circular antenna array of the direction finding station and a maximum allowable phase error of the direction finding station; performing virtualization on the circular antenna array according to the point number of a MUSIC spectrum to acquire a virtual circular antenna array; transforming a feature vector of a noise subspace of the MUSIC spectrum according to the virtual circular antenna array to acquire a transformed feature vector; and calculating the MUSIC spectrum by using a near-field direction vector of the virtual circular antenna array and the transformed feature vector, and determining the location of the near-field interference source in the distance range according to the calculated MUSIC spectrum. The method provided by the invention can perform positioning on the near-field interference source of the direction finding station, and relieves a problem that accurate positioning cannot be performed on the near-field interference source of the direction finding station in the prior art.

The invention discloses a respond wireless interference signal generator and a method thereof. According to the device, a PDA (personal digital assistant) connected with a DSP (digital signal processing) controller is connected with a programmable pulse time delay circuit, a frequency synthesizer and a DDS (direct digital synthesizer) respectively; the frequency synthesizer outputs a local oscillator signal to the DDS and a signal receiving circuit; a time delay circuit is connected with the control end of a DFRM (digital radio frequency memory) of which the input end is connected with a receiving circuit and an antenna; the output end of the DFRM is connected with an IF (intermediate frequency) mixer connected with a clutter generator by a numerical control attenuator; the output end of the IF mixer is connected with a plurality of signal output circuits by a power distributor; and each signal output circuit is also connected with the DDS, and the tail end of each path of output circuit outputs a modulated simulation target signal through the antenna. The respond wireless interference signal generator and the method thereof can perform programming process according to an aerial target motion rule, performs deception or checking on radio positioning equipment by the directed radiation of received same frequency and signal modes, and are suitable for various kinds of radio positioning equipment.

The invention discloses an unmanned aerial vehicle follow-up carrier landing method and system. According to the invention, the unmanned aerial vehicle is controlled to return according to the GPS positioning information, and when the unmanned aerial vehicle returns to a proper range, the orientation and height of the unmanned aerial vehicle are accurately measured through the local area radio positioning base station arranged at the edge of the landing buffer device; and the unmanned aerial vehicle is accurately controlled to tend to be static relative to the ship deck according to the position and the height, so that accurate landing can be realized. The ship-borne vertical take-off and landing fixed-wing unmanned aerial vehicle can land along with the moving ship, the landing buffer device is used for integrating the local area radio positioning technology, the positioning precision of landing is improved, and the anti-interference capacity of the system is improved. Meanwhile, the problem of damage caused by hard collision between the unmanned aerial vehicle and the ship body during landing can be effectively solved.

Described is an apparatus for calibrating a position finding device, having a comparer for comparing a received radio signal pattern to a multitude of reference radio signal patterns, a determiner for determining a signal strength difference, and a determiner for determining a calibration value. The comparer for comparing is configured to select a selection subset from the multitude of reference radio signal patterns by means of a measure of matching between the received radio signal pattern and one reference radio signal pattern, respectively. Determination of the calibration value is based on the signal strength difference, and the determiner for determining the calibration value is further configured to provide the calibration value to the position finding device. Also described are a position finding device for radio-based localization, having such an apparatus for calibrating, a method of calibrating a position finding device based on radio-based localization, and a computer program for performing the method are described.

The invention relates to a non-cooperative inference method of Ad Hoc network physical topology, belonging to the technical field of wireless networks. The method includes the following steps: S1: using radio positioning to distinguish and locate nodes in the Ad Hoc network; S2: obtaining the size of the network deployment area according to the node differentiation and positioning information; S3: according to the size of the network deployment area and the nodes Calculate the important communication distance of the node by distinguishing the positioning information; S4: Infer the network physical topology according to the distinguishing positioning information of the node and the important communication distance of the node. The invention realizes the automatic inference of the network physical topology under the condition of unknown node communication power and other related parameters, and compared with the existing method, the structural effectiveness of the network physical topology is improved and the calculation complexity of the realization process is reduced.

The invention relates to the technical field of radio fix, in particular to a millimetre wave time-division random code phase modulation multi-passage automobile anti-collision radar. The radar of the invention is provided with a time-division and time-sequence asynchronous control to receive / emit signal, and a receive / emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing, the vehicle speed sensing and satellite positioning GPS data MCU control time-division n-passage random code millimetre wave phase modulation; emission is carried out sequentially by upper frequency conversion, R / T3, frequency doubling and power amplification, R / T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R / T1, low noise high amplifier, subharmonic mixing, middle amplifier and extracts the multi-passage signal DSP which is processed and controlled by MCU; the driving of multi-automobile of adjacent lanes is not disturbed by each other and can be completed simultaneously; the high-performance environment electromagnetic compatible EMC is provided; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional panoramic images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognized; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data.

The invention discloses a power data transmission method and device, terminal equipment and a storage medium applied to the terminal equipment. The method comprises the steps of acquiring channel information of a plurality of configured logic channels, wherein the logic channels are Beidou satellite radio positioning system RDSS logic channels, and configuring any RDSS logic channel with a corresponding data processing process; determining a target logic channel from a plurality of RDSS logic channels according to the channel information; receiving to-be-transmitted target power data collectedby the power distribution network automatic feeder terminal; and calling a target data processing process in the target logic channel to process the target power data, and transmitting the processedtarget power data to a power distribution network automation master station. Data transmission can be carried out based on the RDSS transmission link, and the effectiveness of data transmission between the FTU equipment and the power distribution network automation master station is ensured.

A system and method for determining the relative position of stations through radio location is proposed. In one aspect, a station is configured as an apparatus having at least one antenna. At least one first station has at least one first antenna, and at least one second station has at least two base-modulated antennas. The first station sends at least one locating signal via the first antenna. The second station reflects the locating signal as a first modulated reflected locating signal via a first base-modulated antenna and as a second modulated reflected locating signal via a second base-modulated antenna. The first station receives the modulated reflected locating signals via the antenna. The phase relationships of the received modulated reflected locating signals are used to ascertain at least one position angle for the relative position between the first station and the second station.

Methods and systems are disclosed for radio positioning of a vehicle using a virtual positioning reference established by logging a known position of the vehicle together with a local time that a first instance of a predictably repeated code word is received from an opportunistic terrestrial radio transmitter. During movement of the vehicle to a second, unknown position, a local clock is used to determine the time difference between when the virtual positioning reference is predicted to receive a second instance of the code word and when the vehicle actually receives the second instance of the code word, thereby providing positioning information when traditional navigation signals such as GPS are not available. The radio positioning information is then used to initiate an action such as recording the location information for future retrieval by a user, and / or controlling the movements of an autonomous vehicle.

The present invention relates to the field of aircraft return verification, specifically a method for automatic return and landing function verification. The specific steps are as follows: ① initial setting; ② initial position; ③ movement; ④ setting return height; ⑤ positioning; ⑥ setting Parameter; 7. setting; 8. correction; 9. sailing; adopt the present invention to carry out experimental verification, have utilized the characteristic that the radio navigation positioning accuracy of integrated navigation system is high and can correct the position of inertial navigation, by setting radio positioning position and inertial navigation The position difference method, the radio position corrects the position of the inertial navigation, omits the flight simulation software, and reduces the cost; the test is carried out by simulating the air flight process through the position correction, which simplifies the test and facilitates the ground operation.

The invention discloses a multi-angle shooting connection bracket for photography, comprising a base, a universal wheel, a main lifting frame, an inclined bracket, a ball shaft, a camera fixing sleeve, a radio fixing sleeve, a driving motor and a controller, wherein a universal wheel with a footbrake is arranged at the bottom of the base, and a main lifting frame is fixed on the base. And pluralities of inclined brackets are arranged on the top of the main lifting frame, and main lifting frame is connected with multi inclined brackets. The driving motor is arranged on the inclined bracket, and the end of the inclined bracket is provided with a ball shaft, wherein a camera fixing sleeve and a radio fixing sleeve is arranged in a ball shaft. The driving motor is connected with the controller, and the controller is arranged on the main frame of the lift. The multi-angle shooting connection bracket for photography has the advantage simple structure, remote control function and keeping the radio all the time is out of date, and a driving motor is connected with the controller that is arranged on the main lifting frame. The multi-angle shooting connection bracket for photography has simple design and remote control function, and the design operation is reasonable, convenient, reliable and practical.

The invention discloses a radio positioning system and a positioning method thereof. The positioning system comprises at least three master devices and a plurality of slave devices. Each master deviceis in communication connection with each slave device through a wireless link, and one master device in all the master devices serves as a master controller of a radio positioning system; each masterdevice comprises a baseband signal generation circuit, a signal sending circuit, a phase detection circuit, a first main control and communication circuit and a signal receiving circuit; each slave device comprises a second main control and communication circuit, a receiving front-end circuit, a frequency mixing filter circuit and a sending front-end circuit. According to the invention, by changing the signal receiving circuit, the phase delay of the system is reduced, and the complexity of the system is further reduced; the reliability of the system during ranging is improved by an improvedsystem ranging algorithm and adding matched circuits such as a baseband signal generation circuit; the positioning system provided by the invention is low in complexity, small in influence of the environment on distance measurement, low in system power consumption and low in bandwidth occupation.

The invention discloses an indoor UAV fire inspection system based on radio positioning, which includes two parts, namely, the UAV circuit system installed on the indoor fire inspection UAV, and the charging take-off and landing system installed at a predetermined position on the ground. The console, the structure of the UAV circuit system is to include the main control module of the UAV, the main control module of the UAV is connected to the signal processing module and the encoder respectively, and the main control module of the UAV is also connected to the smoke detector respectively. The detection module, the infrared thermal imager connection, and the radio frequency module A signal connection; the signal processing module is connected to the millimeter-wave radar chip through the MIMO array antenna; the encoder is respectively connected to the accelerometer, magnetic sensor and gyroscope module signal. The invention also discloses an indoor UAV fire inspection method based on radio positioning. The system and method of the present invention realize intelligent inspection of indoor safety and have extremely high obstacle avoidance and navigation capabilities.

The invention belongs to the technical field of flagpoles, in particular to an intelligent induction flag-raising positioning device. The intelligent induction flag raising and positioning device includes: a base, an installation box, a hollow flagpole, a radio positioning mechanism, a disassembly mechanism and a cleaning and maintenance mechanism, the installation box is fixedly installed on the top of the base, and the hollow flagpole is fixedly installed on the top of the installation box , the radio positioning mechanism is arranged on the installation box and the hollow flagpole, and the disassembly mechanism and the cleaning and maintenance mechanism are both arranged on the radio positioning mechanism. The intelligent induction flag-raising positioning device provided by the present invention has the advantages of being capable of wireless intelligent positioning, improving the accuracy of flag-raising, facilitating the installation of flags, and convenient maintenance of flagpoles.

The invention relates to an Ad Hoc network physical topology non-cooperative inference system, and belongs to the technical field of the wireless network. The system comprises a radio positioning unitfor differentiating and positioning nodes in an Ad Hoc network and acquiring a network deployment region size according to the node differentiating and positioning information; an important communication distance computation unit for computing the important communication distance of the nodes according to the network deployment region size and the node differentiating and positioning information;a network physical topology inference unit for inferring network physical topology according to the node differentiating and positioning information and the important communication distance of the node. The automatic inference of the network physical topology is realized under the condition of unknowing node communication power and like related parameters; compared with the existing method, the structure effectiveness of the network physical topology is improved, and the computation complexity of the realization process is reduced.