An electromagnetic-radiation-reflecting structure that is attached at a location on a user's body. The electromagnetic-radiation-reflecting structure generating, as the user proceeds in usual fashion, a micro-Doppler effect as a result of its attachment at the location on the body so that a radar cross section of the user is increased, a material of the electromagnetic-radiation-reflecting structure having a conductivity greater than 100 S/m or a conductivity less than 100 S/m, a relative permeability between 100 and 10.sup.5, and a relative permittivity between 1 and 14; or has a conductivity less than 100 S/m, a relative permeability between 1 and 100, and a relative permittivity between 7 and 14; and a surface area of the electromagnetic-radiation-reflecting structure (120) is greater than 1000 mm.sup.2.

A resource determining method and apparatus, an electronic device, a storage medium, a program product, and a vehicle are provided, which are relate to interference listening and avoidance technologies of collaborative radars, and include: determining a first listening result of a first time-frequency resource set; when the first listening result meets a first congestion condition, reducing a time-frequency occupation ratio and/or transmit power of a first target detection signal to obtain a second target detection signal, wherein the first congestion condition includes: a congestion degree of any time-frequency resource in a second time-frequency resource set is greater than a first threshold, and the second time-frequency resource set is included in the first time-frequency resource set; and detecting a target based on the second target detection signal.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a sensing signal receiver may receive, from a sensing signal transmitter, sensing signals for passive object sensing in a plurality of beams; and transmit, to the sensing signal transmitter, feedback information that indicates an association of a set of beams, of the plurality of beams, for sensing signal transmission. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a sensing signal receiver may receive, from a sensing signal transmitter, sensing signals for passive object sensing in a plurality of beams; and transmit, to the sensing signal transmitter, feedback information that indicates an association of a set of beams, of the plurality of beams, for sensing signal transmission. Numerous other aspects are provided.

A close-range microwave imaging method includes: implementing Fourier transform in a pre-set rotation axis direction on an echo signal reflected from a target object and acquired by rotating an array antenna around the pre-set rotation axis to obtain a first echo signal, wherein the first echo signal is represented in polar coordinates; multiplying the first echo signal by a pre-set reference function to obtain a second echo signal; converting the second echo signal into rectangular coordinates by a pre-set algorithm to obtain a third echo signal; and implementing three-dimensional Fourier transform on the third echo signal to obtain three-dimensional image data of the target object. By means of the method, three-dimensional image data of a target object can be obtained fast, fast imaging of the target object can be realized, the data processing amount is small, the imaging precision is high and the method is easy to implement.

A close-range microwave imaging method includes: implementing Fourier transform in a pre-set rotation axis direction on an echo signal reflected from a target object and acquired by rotating an array antenna around the pre-set rotation axis to obtain a first echo signal, wherein the first echo signal is represented in polar coordinates; multiplying the first echo signal by a pre-set reference function to obtain a second echo signal; converting the second echo signal into rectangular coordinates by a pre-set algorithm to obtain a third echo signal; and implementing three-dimensional Fourier transform on the third echo signal to obtain three-dimensional image data of the target object. By means of the method, three-dimensional image data of a target object can be obtained fast, fast imaging of the target object can be realized, the data processing amount is small, the imaging precision is high and the method is easy to implement.

A. waking device is used for waking an electronic device. The waking device includes an infrared sensor and a radar sensor. The infrared sensor continuously measures an energy value in a detection area. When the infrared sensor detects an energy variation, the infrared sensor sends a trigger signal. The radar sensor is electrically connected to the infrared sensor and the electronic device. After the radar sensor receives the trigger signal, the radar sensor switches from a sleep mode to an operating mode. Furthermore, when the radar sensor determines that there is a moving object in the detection area, the radar sensor sends a wake-up signal to the electronic device.

A. waking device is used for waking an electronic device. The waking device includes an infrared sensor and a radar sensor. The infrared sensor continuously measures an energy value in a detection area. When the infrared sensor detects an energy variation, the infrared sensor sends a trigger signal. The radar sensor is electrically connected to the infrared sensor and the electronic device. After the radar sensor receives the trigger signal, the radar sensor switches from a sleep mode to an operating mode. Furthermore, when the radar sensor determines that there is a moving object in the detection area, the radar sensor sends a wake-up signal to the electronic device.

The disclosure relates to a method for processing information based on radar waves, applied to a first terminal. The method includes: a first radar signal sent by a second terminal is received during an event; and identification information of a user to which the second terminal belongs is acquired based on the first radar signal.

The disclosure relates to a method for processing information based on radar waves, applied to a first terminal. The method includes: a first radar signal sent by a second terminal is received during an event; and identification information of a user to which the second terminal belongs is acquired based on the first radar signal.