45 results about "Radio fix" patented technology

A cellphone indoor positioning method on the basis of various sensors mainly solves the problem that an existing cellphone indoor positioning technology can be only based on wireless electric positioning and is greatly limited in positioning. The steps for realizing the method includes utilizing a microphone, a camera and Wi-Fi (wireless fidelity) to collector background noise, light, color and Wi-Fi signal information of a prediction site; storing the collected information and performing feature extraction to obtain feature vectors, and forming a training sample set; training a comprehensive weak classifier set H according to the training sample set; collecting background noise, light, color and Wi-Fi signal information of the current site, and storing and performing feature extraction; and outputting identifying results of the current site by means of feature vectors of the current site according to the comprehensive weak classifier set H. The cellphone indoor positioning method has the advantages of high accuracy and universality and low energy consumption and can be used for realizing positioning of cellphone indoor site types.

The present invention relates to a flexible location area management scheme and arrangement for the reducing of signaling in a cordless communications network, which network comprises central control fixed parts (CCFP), each interconnected to radio fixed parts (RFP), particularly in a DECT based PSTN / CTM network. The invention comprises the steps of associating each of the radio fixed parts (RFP) with a radio fixed part identity (RFPI) in such a way that at least to a certain degree neighboring radio fixed parts (RFP) will have radio fixed part identities (RFPI) with consecutive numbers (x . . . x00, x . . . x01, x . . . x10, x . . . x11), defining the location area configuration of the cordless communications network by assigning a location area level (LAL) to each radio fixed part (RFP), and redefining the location area configuration of the cordless communications network by changing the location area level (LAL) to a different level in at least two radio fixed parts (RFP).

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 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 communication method and device, terminal equipment and a storage medium. The method comprises the steps: obtaining monitoring data collected by a power distribution networkautomatic feeder terminal FTU; monitoring the signal intensity of a communication link communicating with a power distribution network master station, wherein the communication link at least comprisesa Beidou satellite radio positioning system RDSS link and a mobile communication link; determining a target communication link according to the signal intensity of the RDSS link and the signal intensity of the mobile communication link; and transmitting the monitoring data to the power distribution network master station through the target communication link. The communication signal is receivedby setting two communication links, the target communication link is determined according to the signal intensity corresponding to the communication signal, and the monitoring data is transmitted to the power distribution network main station, so that when one communication link is abnormal or the signal intensity of the communication link is poor, the other communication link can be used for datatransmission, and normal communication between the FTU terminal and the power distribution network main station is ensured.

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.

The invention provides a power amplifier individual identification method. Different fingerprint features are extracted by utilizing difference of extracted features of an EfficentNets series heterogeneous convolutional neural network under a low signal-to-noise ratio condition, and the fingerprint feature extraction capability is improved by integrating prediction results of a plurality of networks by using a stacking method. The invention further provides a power amplifier individual identification device which comprises a signal receiving module, a digitization module, a data processing module and a power supply and is simple and practical in structure. According to the method, the parameter amount and the floating point calculation amount are small, and the method is suitable for beingtransplanted to embedded hardware equipment such as an FPGA for use; according to the method, the power amplifier of a certain specific radiation source can be accurately identified by receiving thesteady-state signals of the same batch of radiation sources of a non-cooperative party, so that the specific orientation of the specific radiation source is determined through methods such as radio positioning and the like, and the motion trail of the specific radiation source is tracked.

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 for the physical topology of an Ad Hoc network, and belongs to the technical field of wireless networks. The method comprises the steps of S1, differentiating and positioning nodes in the Ad Hoc network by adopting radio positioning; S2, obtaining the size of a network deployment area according to the node differentiating and positioninginformation; S3, calculating the important communication distance of the nodes according to the size of the network deployment area and the node differentiating and positioning information; and S4, inferring the physical topology of the network according to the node differentiating and positioning information and the important communication distance of the nodes. The method realizes automatic inference of the network physical topology without knowing the relevant parameters such as the node communication power. Compared with the existing methods, the method improves the structural validity ofthe network physical topology and reduces the calculation complexity of the implementation process.

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 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 controllable network / card-lock implementing method based on wireless hand-free telephone, comprising the steps of: 1. adding network / card lock with a functional label indicating whether to open the network / card lock function; 2. when the network / card lock is downloaded to the hand-free telephone, defaulting the network / card lock function as close; and 3. after test and production verification in the existing network, modifying the functional label and inquiring to determine the current state, where the functional label is a variant in a nonvolatile memory and includes network lock label and card lock label and can be a network / card lock label. And the invention can simply implement compatibility between the actually used FWP version and the version of test and production verification.

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.

The invention relates to the field of emergency lifesaving equipment, in particular to a search and rescue guider and a help calling method thereof. The search and rescue guiding device comprises a housing, a Beidou antenna is arranged at the upper end of the front surface of the housing, and a protective cover is arranged on the Beidou antenna; a flash position indicating lamp is arranged on the front surface of the housing; the system further comprises an ultra-short wave antenna. An on-off key and a debugging interface are arranged on the side surface of one side of the housing; an opening is formed in the rear surface of the housing, a battery bin is arranged in the opening, a battery is arranged in the battery bin, and a battery cover is arranged on the opening; and a radio positioning module, a Beidou positioning module and a power supply module are arranged in the housing. The device is simple in structure, easy to carry and good in natural environment adaptability; one-key operation is adopted, so that the use is convenient; the system can be compatible with an active radio positioning system and is reliable in function.

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 invention discloses a built-in antenna comprising: a printed circuit board for receiving and transmitting signals; and a RF cable for connecting the printed circuit board to a device which is to be built-in. With the invention, an effect of using double-frequency can be realized.

The invention relates to the technical field of vehicles, in particular to a vehicle searching device for a vehicle, and the device comprises a positioning unit which is configured to determine a first position where the vehicle searching device is located and a second position where the vehicle belongs by means of a radio positioning technology; the processing unit is configured to plan a vehicle searching route from the first position to the second position according to the first position and the second position determined by the positioning unit; the light emitting unit is configured to emit a guiding light beam according to the vehicle searching route planned by the processing unit; and the voice unit is configured to output voice prompt information according to the vehicle searching route planned by the processing unit in cooperation with the guiding light beams emitted by the light emitting unit. The invention also relates to a corresponding vehicle searching method, a computer program product and a vehicle. According to the invention, the position of the vehicle can be visually indicated by means of the visual light beam in an indoor parking lot with dark light, and the voice prompt information is output in cooperation with the visual light beam to assist a vehicle owner to quickly and effectively find the vehicle to which the vehicle owner belongs.

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.

A radio fixed wideband access system of independently active type comprises terminal transceiving device, user antenna and base station antenna. It is featured as electric-connecting bound type of base station to base station antenna and forming bound type of base station by three sets of centimeter band radio transceiving devices as each said device being used to carry out data-exchange between one set of terminal trasnceiving device and base station.

The invention discloses a tunnel robot personnel following method and system, and belongs to the field of tunnel robots. The system comprises a tunnel robot arranged in a tunnel, a plurality of radio positioning base stations mounted at all positions of the tunnel and a mobile terminal moving along with workers. Each radio positioning base station comprises an information import module, a start-stop control module, a storage module, a coordinate graph generation module, a position detection module and a mobile control module. The tunnel robot personnel following method and system have the effect that the tunnel robot automatically follows a worker to move in a tunnel, and illumination is provided for the worker.

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.