Abstract: A processor-implemented method of performing an operation using a complex-valued attention network includes: extracting a complex-valued attention weight from complex-valued input data; and determining complex-valued attention data by applying the extracted complex-valued attention weight to the complex-valued input data.

Abstract: A distance measuring method and apparatus are provided. The distance measuring apparatus emits a transmission signal while changing a frequency over time, receives a reception signal from an object in response to the transmission signal being reflected from the object, samples a beat frequency indicating a difference between a frequency of the transmission signal and a frequency of the reception signal in a sampling range that changes based on the beat frequency, and determines a distance to the object based on the sampling.

Abstract: Disclosed is a liveness test method and liveness test apparatus. The liveness test method includes determining a presence of a subject using a radar sensor, performing a first liveness test on the subject based on radar data obtained by the radar sensor, in response to the subject being present, acquiring image data of the subject using an image sensor, in response to a result of the first liveness test satisfying a first condition, and performing a second liveness test on the subject based on the image data.

Abstract: A method with radio detection and ranging (radar) data processing may include: obtaining, by a radar sensor, input radar data; and generating, using a resolution increase model, output radar data from the input radar data and reference data, wherein the output radar data has a resolution greater than a resolution of the input radar data.

Abstract: Disclosed are obstacle detecting methods and apparatuses, the method of detecting an obstacle near a device includes, determining whether to detect an obstacle, detecting the obstacle using communication modules, in response to determining to detect the obstacle, determining whether a result of detecting the obstacle meets a threshold, detecting the obstacle using antennas of a communication module corresponding to a direction of the obstacle from among the communication modules, in response to the result of determining the obstacle meeting the threshold, and outputting a warning signal based on the result of detecting the obstacle using the communication modules or a result of detecting the obstacle using the antennas.

Abstract: A communication device includes an input port, a first output port, a second output port, a first output arm including one end connected to the first output port and another end connected to a branch point and including a first switching element configured to be shorted in a second mode, a second output arm including one end connected to the second output port and another end connected to the branch point and including a second switching element configured to be shorted in a first mode, and an input arm including one end connected to the input port and another end connected to the branch point and including a third switching element configured to introduce a discontinuity into a transmission line in the form of a matching element configured to change an impedance of the input arm in a divider mode.

Abstract: A control apparatus includes a Wi-Fi communication module, a processor, a controller that controls a component of a vehicle, and a memory, wherein the memory stores at least one piece of position information corresponding to a position in the vehicle, and at least one registered pattern of a gesture, face, or shape, the Wi-Fi communication module transmits a transmission signal to the position corresponding to the at least one piece of position information by a Wi-Fi communication method at a preset frequency and receives a reflection signal reflected from an object in response to the transmission signal, the processor acquires an input pattern of a gesture, face, or shape of the object by analyzing the reflection signal, and retrieves a registered pattern matching the input pattern from the at least one registered pattern, and the controller controls the component according to an instruction corresponding to the retrieved registered pattern.

Abstract: A method of increasing a resolution of radar data is provided. The method of training a radar resolution increase model comprises generating a high-resolution training ground truth and a low-resolution training input from original raw radar data based on information corresponding to at least one of dimensions defining the original raw radar data, and training the resolution increase model based on the high-resolution training ground truth and the low-resolution training input. A radar data processing device generates high-resolution output data from low-resolution input data based on a trained resolution increase model.

Abstract: An antenna system includes a first antenna including first radiating components and first planar re-radiating components, a second antenna including second radiating components and second planar re-radiating components, and reflective components positioned between the first planar re-radiating components and the second planar re-radiating components.

Abstract: An antenna array apparatus includes: first antenna elements arranged to form a first radiation pattern with a recessed portion at the center of the first radiation pattern; and second antenna elements arranged to form a second radiation pattern with a convex portion at the center of the second radiation pattern.

Abstract: A distance measuring method and apparatus are provided. The distance measuring apparatus emits a transmission signal while changing a frequency over time, receives a reception signal from an object in response to the transmission signal being reflected from the object, samples a beat frequency indicating a difference between a frequency of the transmission signal and a frequency of the reception signal in a sampling range that changes based on the beat frequency, and determines a distance to the object based on the sampling.