599 results about "Directional antenna" patented technology

The invention discloses an intelligent traceable hazardous waste management system based on RFID, particularly relates to the technical field of hazardous waste intelligent supervision, and is used for solving the problems of unreliable data acquisition, misreading and misreading and state updating delay caused by signal interference of an existing RFID system in a high-density hazardous waste storage scene. The method comprises the following steps: dynamically dividing warehouse sub-regions, distributing a unique grouping identification code, and combining a directional antenna array partition scanning technology to avoid signal crosstalk; by analyzing the multi-path phase fluctuation rate and the polarization direction offset, a main interference frequency band is dynamically identified by using a covariance decomposition algorithm, and the communication frequency is switched, so that the tag identification rate in a complex electromagnetic environment is improved; scheduling a target sub-region scanning process based on a warehouse-in and warehouse-out instruction, synchronously verifying a label state and an actual position, generating an operation link space-time atlas, actively tracing cross-region time logic contradictions and triggering full-disk scanning; and full-process accurate tracing of the hazardous waste container and complete data management and control in a high-density scene are realized.

The method focuses on the technical field of communication, and the communication connection problem under the cooperative operation scene of the unmanned vehicle and the unmanned aerial vehicle is accurately positioned. In practical application, communication connection is troubled by a complex environment, signals are prone to strong interference, the transmission distance is obviously limited, and double requirements of real-time performance and accuracy are difficult to consider in the aspect of data transmission characteristics during cooperative operation of the two. According to the invention, ZigBee, 5G, satellite communication modules and multi-mode communication modules are integrated, an adaptive protocol is optimized, channels are sensed in real time, the channels are selected and switched through an intelligent algorithm, signals are enhanced through directional antennas and beam forming, interference resistance is realized through adaptive filtering and error correction coding, and stability is guaranteed by means of link monitoring and a self-healing mechanism. According to the method, reliable interaction of data between the unmanned vehicle and the unmanned aerial vehicle in a complex environment can be ensured, and real-time and accurate transmission of monitoring data can be ensured even in case of strong electromagnetic interference or severe weather.

Systems and methods relating to a millimeter wave radio-frequency (RF) sleep monitoring device are described. The device includes a surface transparent to RF signals through which a radar device enclosed in a housing transmits RF signals. An antenna array is enclosed within the housing and is oriented at a non-zero angle with respect to a vertical axis of the device. The antenna array receives the reflected RF signals through the surface. The reflected RF signals are used to generate sleep monitoring data such as a respiratory rate or motion data associated with a user.

Aspects presented herein may enable a user equipment (UE) to perform angle-of-arrival (AoA) determination using non-ideal and non-directional antennas. In one aspect, a UE obtains an indication of a phase difference of arrival (PDoA) function related to the first user equipment (UE). The UE obtains a set of PDoA measurements associated with a second UE when the first UE is associated with a plurality of orientations. The UE computes, based on the PDoA function, the set of PDoA measurements, and the plurality of orientations of the first UE, a general function that is associated with a probability in which the second UE is at a set of relative directions compared to the first UE. The UE estimates, based on the computed general function, a relative direction of the second UE compared to the first UE, where the relative direction is included in the set of relative directions.

The invention provides a lightning trajectory data fusion detection based single-tree accurate early warning system for lightning fire, and relates to the technical field of meteorological disaster monitoring and early warning and forest lightning fire prevention and control. The lightning trajectory data fusion detection based single-tree accurate early warning system comprises an electromagnetic radiation receiving module which adopts an antenna array composed of at least four directional antennas to receive electromagnetic radiation signals generated by lightning, the antenna array is connected with a signal conditioning circuit, and the signal conditioning circuit is connected with the electromagnetic radiation receiving module. The signal conditioning circuit amplifies the received weak electromagnetic signal by 100-1000 times, processes the weak electromagnetic signal with a filtering bandwidth of 10 kHz to 1 MHz, and transmits the weak electromagnetic signal to a data acquisition card with a sampling frequency of 5-20 MS / s and a sampling precision of 12-16 bits. By integrating lightning electromagnetic radiation continuous sampling, infrared, visible light and ultraviolet multispectral tracking shooting and atmospheric electric field early warning multi-modal data, a lightning track is accurately detected, and by combining forest environment information, accurate early warning of a single tree where a lightning fire may occur is achieved.

The invention provides a communication resource scheduling method and system for a low-orbit satellite, and the method comprises the steps: transmitting a spot beam to a target region by the low-orbit satellite through a directional antenna, and starting to provide communication services for all target terminals in the coverage range of the spot beam; when the preset switching period is ended, the satellite resource control center determines a new low earth orbit satellite taking over the target area according to the real-time motion information of the low earth orbit satellite; controlling the new low-orbit satellite to adjust the pointing angle of the directional antenna so as to enable the spot beam emitted by the new low-orbit satellite to cover the target area; meanwhile, beam switching instructions are generated and sent to all target terminals in batches; and all the target terminals execute a beam switching action so as to continuously provide communication services for all the target terminals through the spot beams emitted by the new low-orbit satellites. According to the invention, unified beam switching of all user terminals in the target area is realized, the situation of high concurrency of switching instructions of a satellite resource control center when the number of users is large is avoided, and the communication response speed of the users is improved.

The invention provides a communication device, a communication method, a communication system, electronic equipment and a storage medium, which are applied to the technical field of communication and are used for solving the problem that the coverage range and the antenna gain of an existing intelligent antenna cannot meet the use requirements of different use environments. The communication device comprises a multiplexer and a plurality of antenna structures. The multiplexer comprises a common end and a plurality of selection ends. The common end of the multiplexer is coupled with one radio frequency channel, and the common end is used for being switched and conducted with different selection ends in the plurality of selection ends to form a plurality of paths. The multiple antenna structures comprise phased-array antennas, the multiple selection ends comprise first selection ends, and the phased-array antennas are coupled with the first selection ends. The plurality of antenna structures further comprise an omnidirectional antenna, the plurality of selection ends further comprise a second selection end, the omnidirectional antenna is coupled with the second selection end, and / or the plurality of antenna structures further comprise a directional antenna, the plurality of selection ends further comprise a third selection end, and the directional antenna is coupled with the third selection end.

The invention provides a satellite search method and device, electronic equipment, a storage medium and a program product, and relates to the technical field of communication. According to the method, under the condition that the terminal has no satellite ephemeris information or the ephemeris fails, the target search airspace of the satellite is accurately determined by acquiring the terminal position information and the satellite constellation configuration information, and efficient search is performed in the airspace by using the directional antenna, so that the satellite search time and computing resource consumption are remarkably reduced.

The invention provides a wide-range unmanned aerial vehicle sensing system and method based on a wireless relay technology, and relates to the technical field of unmanned aerial vehicle sensing. The system comprises a radio detection device and a wireless relay device deployed on the periphery of the radio detection device, the wireless relay device comprises a receiving antenna, a signal optimization unit and a broadband directional antenna, the receiving antenna is used for capturing radio signals transmitted by the unmanned aerial vehicle, the signal optimization unit is used for amplifying and processing the received signals, and the broadband directional antenna is used for receiving the radio signals transmitted by the unmanned aerial vehicle. The broadband directional antenna is used for re-transmitting a signal to the direction where the radio detection equipment is located; the radio detection device is used for passively receiving and decoding radio signals and capturing information of the unmanned aerial vehicle in real time, and the method comprises the steps of signal receiving and optimizing, signal redirection and transmission, signal decoding and analysis, information feedback and processing and the like. According to the invention, the unmanned aerial vehicle detection requirements of flakey areas such as airports with larger protection requirement ranges can be met, and low cost, low power consumption and high efficiency are ensured.

Omni-directional, horizontally polarized antennas are provided. According to one aspect, an omni-directional, horizontally polarized antenna includes a first reflector and a second reflector separated from the first reflector. Disposed between the first and second reflectors are a planar array of radially directed horizontally polarized antenna elements and a planar feed network configured to feed the antenna elements of the planar array. A coaxial feed structure configured to communicate electrical signals to or from the feed network is provided.

The invention discloses a terahertz-based full-spectrum sensing integrated system and method, and relates to the field of intelligent regulation and control, and the method comprises the steps: initializing a multi-spectrum terahertz source array, configuring a plurality of sensors to collect environment data, loading the environment data into an environment adaptation algorithm library, generating an optimization scheme, and adjusting the parameters of a multi-spectrum terahertz source; performing full-space scanning through a multi-directional antenna array, scanning and monitoring a target motion state in real time, and switching a tracking mode after the target motion state is stable to obtain a target position and a target trajectory; a terahertz source emission target is determined, multi-spectrum terahertz wave parameters are adjusted, a target area is focused, and echo signals are obtained; and extracting a plurality of pieces of feature information of the target, accurately positioning the target, and integrating the plurality of pieces of feature information to lock the target. According to the invention, through the introduction of the environment adaptation algorithm library, the intelligent adjustment of the multi-spectrum terahertz source parameters is realized, and the environment adaptation and the target detection, identification and tracking capabilities are improved.

The invention discloses a wellhead water content measuring method based on a double-frequency microwave directional antenna sensor, and the double-frequency microwave directional antenna sensor comprises two first microwave directional antennas, two second microwave directional antennas, an annular disc and a pipe body, the annular disc is annular, the annular disc is sleeved outside the pipe body and is fixedly installed with the pipe body, and the pipe body is fixedly installed on the annular disc. The two first microwave directional antennas are located above the annular disc, and the two second microwave directional antennas are located below the annular disc; the two sides of the pipe body in the radial direction are each provided with one first microwave directional antenna, and the two sides of the pipe body in the radial direction are each provided with one second microwave directional antenna. Dielectric constants and dielectric losses of oil and water are remarkably different, so that phase deviation occurs when a high-frequency microwave signal is propagated in an oil-water mixed medium, and the water content in oil-water two-phase flow is obtained by analyzing phase voltage signals with different frequencies through a double-frequency microwave directional antenna sensor.

An object is to provide a small directional antenna. A radio wave deflection element is formed as a plate-like member including a plurality of stacked dielectric layers, having a principal surface perpendicular to a first direction, and having a longitudinal direction in a second direction perpendicular to the first direction; and a radio wave source is disposed so as to be separated from the radio wave deflection element in the first direction and offset from a center of the radio wave deflection element by a predetermined distance in the first direction, and configured to emit a radio wave to the radio wave deflection element. Dielectric constants of the plurality of dielectric layers decrease in a stepwise manner as a distance from the center of the radio wave deflection element increases in the first direction.

The invention relates to the technical field of satellite navigation and wireless communication, and discloses an indoor positioning method and system based on feeder multiplexing Beidou double-frequency, and the method comprises the steps: receiving outdoor B1I and B2a signals through a high-gain Beidou double-frequency receiving antenna, carrying out the frequency separation and signal conditioning through a double-frequency separation filter, and carrying out the positioning of the B1I and B2a signals; and transmitting the B1I signal to an indoor distributed antenna for broadcasting through the existing communication feeder network, and transmitting the B2a signal to a central directional antenna to establish a time synchronization reference. A mobile terminal receives a dual-frequency signal, capturing and tracking are carried out through digital signal processing, and pseudo-range and carrier phase observation values are extracted. And performing pairing processing on observation data of the same antenna, calculating a dual-frequency pseudo-range difference value, eliminating system errors, and performing position calculation by adopting a weighted least square method and Kalman filtering. The method solves the problem that the traditional GPS signal cannot cover the indoor environment, and has a good application prospect in the scenes of underground commercial complexes, tunnels, parking lots and the like.

The invention relates to the field of high-speed rail communication equipment, in particular to an adjustable antenna support for high-speed rail construction of a communication base station iron tower, and the adjustable antenna support comprises a cylindrical tower which is arranged on one side of a rail, and the distance between the bottom end of the cylindrical tower and the rail is larger than the height of the cylindrical tower; the circumferential outer wall of the cylindrical tower is sleeved with a mounting pipe, and the mounting pipe slides along the outer wall of the cylindrical tower; a hoisting assembly is arranged at the top end of the cylindrical tower and connected with the top end of the mounting pipe; directional antennas are mounted on the circumferential outer wall of the mounting pipe; a rotation driving assembly is arranged between the installation pipe and the directional antenna, the installation end of the rotation driving assembly is arranged on the circumferential outer wall of the installation pipe, and the directional antenna is installed at the swing end of the rotation driving assembly. The directional antenna always faces the high-speed rail when the high-speed rail passes through the directional antenna, and the signal propagation quality of the high-speed rail communication base station is

The invention discloses an integrated sensing and communication system design method and system based on a flexible antenna array, and relates to the technical field of communication. According to the method, an ISAC system comprising a flexible antenna array FAA base station, a single-antenna user and a sensing target is constructed, and the FAA can adaptively adjust the shape in the horizontal direction. The base station can communicate with the User and perceive a target at the same time, and jointly communicate and perceive signals to obtain a channel vector and a target echo signal. The characteristics of the antenna are determined through omnidirectional and directional antenna modes, and the sensing performance is measured by using a sensing channel and a Cramer-Rao bound CRB (Cramer-Rao Boundary). An optimization problem is constructed with the goal of minimizing CRB and ensuring the minimum communication rate of a user, and an S lemma and a semi-definite relaxation SDR are used to convert a related design problem into a convex subproblem for solving, so that communication and perception collaborative optimization is realized. Through the flexible antenna array, the sensing and communication performance of the system is remarkably improved, and the resource utilization rate is improved.

The invention discloses a step frequency continuous wave ground penetrating radar imaging device and a rapid imaging method, and belongs to the technical field of microwave ground penetrating imaging. The vector network analyzer is adopted, the radio frequency power amplifier is carried, the ultra-wideband directional antenna is combined, signals of a step frequency continuous wave system are adopted, the frequency range is 700 MHz to 3 GHz, the bandwidth is large, meanwhile, the large transmitting power can be achieved, and meanwhile the requirements for the detection depth and the detection resolution are met; according to the method, direct wave interference is eliminated by adopting a singular value decomposition algorithm, then the effective signal strength is improved based on an automatic gain algorithm, and finally clutter interference is eliminated by adopting a block matching algorithm, so that the signal-to-noise ratio is improved; according to the method, an F-K migration imaging algorithm is developed, processed data are converted to a frequency wavenumber domain through Fourier transform, wavenumber domain data are filled before fast inverse Fourier transform, and the transverse space sampling rate and the imaging speed are increased.

The invention relates to an industrial wireless communication system and method. The system comprises terminal equipment used for executing specific operation or data acquisition in an industrial environment; the directional antenna wireless router serves as a data transmission relay in a network, is provided with a directional antenna and is used for covering and connecting the terminal equipment in a directional mode through wireless signals so as to achieve wireless transmission of data, and rapid deployment and flexible adjustment of the router are achieved by introducing the unmanned aerial vehicle technology and the scheme. The unmanned aerial vehicle can quickly fly to the target position, and the flight height and the antenna angle are adjusted according to actual requirements, so that the timeliness and the accuracy of network coverage are ensured. The flexibility is crucial to frequent changes of the positions and the number of the terminal devices in the industrial environment, and the adaptability and the stability of the network are improved.

The invention belongs to the technical field of wireless communication, and particularly discloses an interphone channel allocation optimization method and system based on signal intensity, and the method comprises the steps: collecting an actual interference signal of an engineering site, achieving the efficient recognition of a novel interference mode, and remarkably improving the communication reliability in a complex environment; the method comprises the following steps: respectively executing a first channel allocation strategy and a second channel allocation strategy by determining an interference source type of an application engineering site to realize accurate allocation of channel resources in different interference scenes; a first channel allocation strategy including full-band channel switching and directional antenna beam adjustment is adopted, so that the communication continuity and reliability in a complex interference environment are effectively improved; the active channel switching mechanism is triggered by calculating the path signal consumption factor in combination with the signal shielding body information, and then the second channel allocation strategy is realized according to the service type, so that the communication quality and efficiency in a dynamic environment can be improved.

A satellite communication method, including searching, by a terminal device, for at least one first satellite in a first range by using a first antenna, where the terminal device includes a first directional antenna and a second directional antenna, and the first directional antenna corresponds to first coverage, and the second directional antenna corresponds to second coverage. The first antenna is the first directional antenna and the first range is the first coverage, or the first antenna is the second directional antenna and the first range is the second coverage, or the first antenna is the first directional antenna and the second directional antenna and the first range is the first coverage and the second coverage.

The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array, and belongs to the field of unmanned aerial vehicle countering. The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array. The method comprises the following steps: detecting and tracking a multi-sensor fused target; generating a multi-band interference signal; multi-band signal interference based on a directional antenna array; the system comprises a detection and tracking module, a signal generation and processing module, a directional interference array module, a main control and interaction module and an integrated platform and support module. The problems that in the prior art, a high-speed maneuvering unmanned aerial vehicle is difficult to track, and a modern unmanned aerial vehicle using multiple communication frequency bands at the same time cannot be effectively handled are solved. The method is high in interference efficiency and long in acting distance, wide effectiveness of unmanned aerial vehicles of different models and different communication configurations is guaranteed, multi-band coverage is achieved, the beam switching speed reaches the millisecond level through electronic beam forming, and the capacity of coping with complex targets is high.

The utility model provides an anti-unmanned aerial vehicle antenna structure, which comprises an antenna housing, a reflecting plate, a plurality of radio frequency cable joints arranged in the antenna housing, a feed network, an antenna half-wave oscillator, a power divider, a coupler, a directional coupler, a directional antenna system, a control system and a power supply unit, wherein a plurality of radio frequency cable probes are connected with the antenna half-wave oscillator; comprising a 868MHz / 915MHz radio frequency cable joint, a 1.5 GHz radio frequency cable joint, a + 2.4 GHz radio frequency cable joint, a-2.4 Ghz radio frequency cable joint, a 5.8 GHz radio frequency cable joint and a 533MHz-6000 MHz radio frequency cable joint. The antenna half-wave oscillator comprises a T-shaped antenna, a symmetrical antenna, a ceramic antenna and an aluminum plate antenna; the power divider is connected with the symmetrical antenna; the coupler is connected with the T-shaped antenna; the directional coupler is connected with the ceramic antenna; the directional antenna system is connected with the control system. The antenna provided by the utility model is smaller in structure, improves the interference precision, reduces the energy consumption, enhances the anti-interference capability, and is higher in antenna gain.

Disclosed is a technology for operating an unmanned aerial vehicle support network. In an embodiment, a method, performed by an electronic device, for determining a flight path, a beam parameter, and resource allocation of an aerial base station in a system comprising a ground base station, the aerial base station, and a plurality of user devices that receive data from the ground base station via a relay of the aerial base station may comprise the steps of: setting requirements including a minimum required data transfer rate condition for each user device; and determining a flight path, a beam parameter, and resource allocation of the aerial base station for maximizing the sum of reception data transfer rates of the plurality of user devices while satisfying the set requirements.

The invention provides terminal equipment and a communication control method, and the method comprises the steps: controlling an antenna operation mode of the terminal equipment to be switched from an omnidirectional antenna mode to a directional antenna mode when a signal quality parameter is monitored to be smaller than a first threshold value and the terminal equipment is performing data transmission, the ability of the directional antenna mode to receive and transmit signals in a specific direction is superior to that of the omnidirectional antenna mode. And then displaying the first pose prompt information and the second pose prompt information through a display screen to prompt a user to adjust the spatial pose of the terminal equipment to a target pose. When the terminal equipment is in the target attitude, the main beam of the directional antenna of the terminal equipment is opposite and parallel to the main beam of the antenna of the service base station, the loss of a space link between the terminal equipment and the service base station is minimum, and even if the terminal equipment is in a weak signal area, additional devices are not needed. And the uplink transmitting power and the downlink receiving capability of the terminal equipment are enhanced, so that the user call and the networking application are smoother.

The embodiment of the invention provides a communication method, terminal equipment and an antenna assembly. The communication method is used for communication between first equipment and second equipment. The communication method comprises the following steps: acquiring first communication quality, wherein the first communication quality is determined according to signal quality when a first device communicates with a second device through an omnidirectional antenna; acquiring second communication quality, wherein the second communication quality is determined according to signal quality when the first device communicates with the second device through the directional antenna; determining a target antenna in the omnidirectional antenna and the directional antenna according to the first communication quality and the second communication quality, wherein the target antenna comprises at least one of the omnidirectional antenna and the directional antenna; and establishing communication between the first device and the second device through the target antenna. The communication quality between devices can be improved or the cost of the devices can be reduced.

The invention relates to the field of wireless communication, in particular to aerospace vehicle wireless communication, and discloses a dual-frequency dual-high measurement and control tracking system and method based on trajectory prediction and constellation mapping. The system comprises an L omnidirectional antenna, a C directional antenna, a dual-frequency information extraction and fitting module, a track constellation mapping and module, an antenna parameter dynamic adjustment module and an antenna tracking performance monitoring module. The dual-frequency information extraction and fitting module receives data of the two antennas, extracts flight information of a fitted aircraft and outputs coordinate conversion parameters; the trajectory constellation mapping and module predicts a short-term flight trajectory of the aircraft according to the coordinate conversion parameters and outputs flight trajectory constellation coordinate range information; the antenna parameter dynamic adjustment module sets a tracking interval according to flight path constellation coordinate range information, and outputs high-precision antenna pointing information to control a C directional antenna in combination with directional antenna parameters; the antenna tracking performance monitoring module is used for evaluating the directional performance of the C directional antenna.

The invention discloses a method for calculating the requirement of signal capture among lunar orbit formation satellites on satellite orbit measurement accuracy, and belongs to the technical field of deep space exploration. The method comprises the following steps: under a ground test condition, measuring an antenna pattern, transmitting signal power and receiving sensitivity of a master satellite, measuring an antenna pattern, receiving sensitivity and a transmitting EIRP value of a slave satellite, measuring an installation error and an antenna mechanism deformation error of a high-gain directional antenna of the master satellite, and measuring attitude control precision of the master satellite. According to the main satellite antenna pointing total error requirement, the antenna installation error, the antenna mechanism deformation error and the beam pointing error caused by the attitude control precision of the main satellite, the position error requirement of the slave satellite relative to the main satellite is calculated; and determining orbit measurement precision requirements of the master satellite and the slave satellite based on the position error. According to the method, the orbit measurement requirement can be put forward to a ground measurement and control system in advance, or the proper inter-satellite distance can be selected according to the orbit measurement precision provided by the ground, and the success probability of establishing the inter-satellite link is improved.

The invention relates to a wireless network coverage method. The technologies of AP fixed point directional coverage, a dual-polarization intelligent antenna, MESH networking and the like are creatively fused. The method comprises the following steps: 1) deploying a plurality of fixed AP sites in a mining area, and configuring a directional antenna to cover the whole operation area; 2) installing a dual-polarization intelligent antenna system on a mobile device, transmitting and receiving data through dual polarization, and obtaining the position and orientation of the device by using a GPS and an attitude sensor; (3) the controller operates an algorithm, adjusts the antenna beam direction in real time, and keeps an optimal signal with the nearest AP site; 4) adopting WLAN MESH networking, selecting a nearest node with the strongest signal as a father node by a mobile node to establish a link, and realizing wireless full coverage through multi-hop forwarding; and 5) the AP station evaluates the service quality of the mobile node, optimizes the MESH link, and ensures the network reliability and time delay. According to the method, global dynamic coverage of the mining area is realized on the basis of limited fixed stations, and the high-standard requirement of key services of the mining area on a network is met.

The invention relates to a system for the teleoperated control of a ground-based passenger vehicle (1) comprising the ground-based passenger vehicle (1) and a control unit (2) arranged spatially separate from the passenger vehicle (1), wherein the passenger vehicle (1) can be controlled by an operator by means of control signals generated by the operator and transmitted from the control unit (2) to the passenger vehicle (1), wherein the passenger vehicle (1) has at least one camera (3), wherein the control unit (2) has a display device (4), wherein image data acquired by means of the camera (3) can be transmitted to the control unit (2) and displayed by means of the display device (4) for the operator to control the passenger vehicle (1), wherein the control signals and the image data can be wirelessly transmitted between a vehicle antenna system (AFS) of the passenger vehicle (1) and a transmission antenna system (AUS),wherein the control signals and the image data can be transmitted wirelessly and / or by wire between the transmission antenna system (AUS) and the control unit (2). The invention also relates to a method for the remote control of a ground-based passenger vehicle (1). An uninterrupted and interference-free transmission of control signals and image data between the passenger vehicle (1) and the control unit (2) is ensured, inter alia, by the vehicle antenna system (AFS) having a directional antenna (AF) with an adjustable viewing direction.

The invention discloses a Beidou pseudo satellite fusion positioning method and system in a tunnel. The method comprises the steps that a tunnel is divided into multiple sections of visible sub-areas, a relative coordinate system is established, Beidou signals are introduced into the tunnel through Beidou pseudo satellites, a common commercial receiver can still have the Beidou signal positioning capacity in the tunnel, meanwhile, according to the environment in the tunnel, a directional antenna is adopted, the multipath effect is reduced, and the positioning accuracy of the Beidou signals is improved. An infrared distance measuring device is arranged in a specific area, the vehicle driving direction and Doppler errors are judged, single pseudo satellite positioning is achieved through Doppler, and final coordinate output is achieved through the relation between relative coordinates and map coordinates.