9 results about "Radiowave propagation" patented technology

[Problem] Provided is a measurement system for a radio wave propagation characteristic capable of achieving a measurement with higher accuracy by eliminating influences of a human and a wired cable in the measurement of the radio wave propagation characteristic in a space. [Solution] The measurement system for a radio wave propagation characteristic includes a base station 3 and a mobile terminal 20 wirelessly communicable with the base station 3. The base station 3 and the mobile terminal 20 are mutually synchronized in time, frequency, and phase. A propagation characteristic of a radio wave wirelessly communicated between the mobile terminal 20 moving in a measurement target space and the base station 3 is sequentially measured on a time-series basis in association with each piece of position information of the mobile terminal 20.

This design device comprises: an input unit that acquires area information and design constraint information; an analysis unit that generates a radio wave propagation analysis result on the basis of the area information and the design constraint information; and a design unit that determines a pattern of a reflection plate on the basis of the area information, the design constraint information, and the radio wave propagation analysis result.

This invention provides an information processing device and a model modification method that improve the accuracy and reliability of radio wave propagation models. [Solution] The method involves acquiring a radio wave propagation model having a radio wave propagation area in a virtual space and objects within the area having predetermined radio wave propagation characteristics, acquiring radio wave propagation path information and reception level information for each receiving point in the model based on the simulation results of radio wave propagation, acquiring radio wave direction of arrival information and reception level information for each actual measurement candidate position in real space corresponding to the receiving point, deriving the difference between the reception level at the first receiving point and the reception level at the corresponding first actual measurement candidate position, extracting the second receiving point with the largest difference among the first receiving points, deriving the first direction of arrival received at the second actual measurement candidate position with the maximum reception level based on the direction of arrival information at the corresponding second actual measurement candidate position, extracting the first path that has a direction close to the first direction of arrival among the paths passing through the second receiving point, and correcting the radio wave propagation characteristics of objects on the first path.

The present invention provides an information processing device that can efficiently determine candidate locations for radio wave propagation models that can be improved using measurement results, while reducing the number of candidate locations for actual measurement of radio waves in real space. [Solution] An information processing device equipped with a processor, the processor acquires a radio wave propagation model having a radio wave propagation area which is a virtual space in which radio waves propagate, and objects placed in the area having predetermined radio wave propagation characteristics, performs a simulation of radio wave propagation using the model, and determines candidate measurement locations in real space for acquiring measured values ​​to be used to modify the characteristics of the radio wave propagation model based on the simulation results.

To provide a versatile power transmission system and power transmission equipment. [Solution] The power transmission system 100 includes a power transmission unit 101 that transmits AC power of multiple frequencies to which a bias voltage is applied as power transmission radio waves; a power transmission side radio wave lens 1016 and a power receiving side radio wave lens 1021 formed of a conductive medium whose radio wave propagation speed is different from that of the atmosphere or outer space, and which output transmitted waves from the medium at a transmission angle different from the incident angle of the incident wave; and a power receiving unit 102 that receives power transmission radio waves transmitted through the power transmission side radio wave lens 1016 and focused by the power receiving side radio wave lens 1021.

A radio wave visualization system according to an embodiment includes: a model creation unit that creates a three-dimensional scale model of an environment including a terrain and a building of an area to be evaluated for a propagation characteristic of radio waves used for a wireless communication system in which a base station and a terminal station perform wireless communication via a RIS reflector; an evaluation condition creation unit that creates a plurality of evaluation conditions used for evaluating the propagation characteristic of radio waves for the target area on the basis of performance of the wireless communication system; and a RIS simulation unit that simulates and adds a reflection characteristic of the RIS reflector to the three-dimensional scale model created by the model creation unit on the basis of each of the plurality of evaluation conditions created by the evaluation condition creation unit.

A radio wave propagation simulation system is constituted with a computer including an arithmetic device that executes predetermined arithmetic processing and a storage device connected to the arithmetic device, and includes a model generation unit which generates a radio wave propagation model by the arithmetic processing of the arithmetic device, and the model generation unit generates a plurality of planes that simulate one surface of a structure, defines, as an attribute of each of the planes to be generated, a unit normal vector representing an orientation of each of the planes and generates a radio wave propagation model constituted with the generated planes.

The system allows for real-time monitoring of precipitation conditions in the propagation path between opposing radios while transmitting and receiving signals, enabling adjustment of the frequency bandwidth. [Solution] In a wireless communication system according to one embodiment of the present invention, the master station a stores a portion of the transmission signal to the slave station b as a known signal in memory 17a, the correlation calculation unit 19a performs a correlation calculation between the reflected signal reflected in the propagation path 30 between the transmission signal and the slave station b and the known signal in memory 17a, the precipitation estimation unit 20a estimates the precipitation conditions in the propagation path 30 based on the results of the correlation calculation, and the communication parameter control unit 21a changes the frequency bandwidth according to the estimated result of the precipitation conditions in the propagation path 30.