Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term Evolution (LTE). Disclosed is a method of defining a resource block or resource element offset for mapping PTRS to a symbol, wherein the offset is determined based on an identifier of a particular user equipment, UE.

Abstract: The present invention relates to a non-rotating direct current electric generator capable of generating a direct current with high efficiency without rotating a field magnet or an armature. The non-rotating direct current electric generator according to the present invention is a direct current electric generator generating a direct current. and is characterized by comprising a drive unit and a generator unit. wherein the generator unit comprises: a rod-shaped core member: a field magnet having a first hollow part in the center part along with the winding of an electric line. and disposed on the outside of the core member through the first hollow part: and an armature having a second hollow part in the center part along with the winding of an electric line. and disposed on the outside of the core member through the first hollow part.

Abstract: A method for calculating an altitude of a target through an apparatus for calculating an altitude of the target, which comprises a plurality of MIMO radar virtual antennas, may comprise: receiving electromagnetic waves reflected from the target through a pair of virtual antennas classified into an upper antenna and a lower antenna and alternately arranged in two columns linearly; obtaining range information and phase information of the target from the pair of virtual antennas by analyzing the electromagnetic waves; and calculating altitude information of the target from position information of the pair of virtual antennas, and the range information and the phase information.

Abstract: A non-rotating alternating current (AC) generating device for generating an AC current, includes: two or more generator units which are placed next to each other, wherein the generator unit includes a round bar-shaped core member, a field magnet in which an electric line is wound and a first hollow portion is formed in the central portion, the field magnet disposed on the outside of the core member through the first hollow, an armature in which an electric line is wound and a second hollow portion is formed in the central portion, the armature disposed on the outside of the core member through the second hollow portion, a pole piece which is provided between the field magnet and the armature, and insulating plates which are disposed between the field magnet and the pole piece and between the armature and the pole piece.

Abstract: Provided is a turbo air compressor system which is mounted to a rotor or a blade housing of a wind power system to change a path of an air inflow, compress the flowing air, and increase the rotation speed and the rotating force of a rotating member such as a turbine or a blade. When the turbo air compressor system is mounted to the wind power system having a cylinder-shaped rotor, various applications in which a size of the main body and the multistage structure can be changed according to an external environment can be provided in consideration of a size of the rotor and changes in the wind direction and the wind speed. In addition, the cylinder-shaped rotor additionally including a direct ion change device includes rear surface inclined portions, so that air resistances that occur at the wings of the blade or the rotor or drag against the rotation direction can be minimized.