An electronic device includes a housing, a first antenna included in a first region of the housing, a second antenna included in a second region of the housing, an antenna structure that is disposed within the housing, a coupler that obtains an impedance of each of the antennas and the antenna structure, a memory that stores a table in which the impedances of each of the antennas and the antenna structure are matched to a location or a contact of an external object, and a processor, and the processor obtains the impedances of each of the antennas and the antenna structure from the coupler when the external object approaches the electronic device, obtains the location or the contact of the external object based on the obtained impedances and the table, and transceives a signal through the antenna structure in a direction where the external object is absent.

A data sending method includes: performing, by a first node, rate matching to determine a first bit sequence; determining, by the first node, a first symbol sequence based on the first bit sequence, and determining some to-be-mapped symbols in the first symbol sequence; and mapping, by the first node, the symbols to a first resource, and sending the symbols.

A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit primarily spreads a response signal by use of a ZAC sequence established by a control unit. A spreading unit secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit. The control unit controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit and the block-wise spread code sequence to be used for the secondary spread in the spreading unit. The hopping pattern established in the control unit is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.

Wireless devices may receive channel state information (CSI) measurement resources for a plurality of cells, including cells of a first transmission point and cells of a second transmission point. The wireless device may measure CSI for each cell, and may quantize the measured CSI jointly across the cells. The wireless device may send the jointly quantized CSI to a base station, and the jointly quantized CSI may be used in communications via the first transmission point and the second transmission point.

A method for a terminal mitigating interference in a wireless communication system according to an embodiment of the present invention comprises the steps of: receiving a first message having a previously configured pattern from a serving base station communicating cooperatively to control interference with at least one adjacent base station; triggering a common reference signal (CRS) interference mitigation function of the terminal in response to the first message in order to mitigate interference due to a CRS transmitted from the at least one adjacent base station; and cancelling interference due to the CRS on the basis of the CRS interference mitigation function, and receiving data.

A wireless communication system includes a first transmitter and a second transmitter. For a transmission or reception of data of a first user equipment and data of a second user equipment on resources shared by the first user equipment and the second user equipment, the first transmitter is configured for a superimposed non-orthogonal multiple access, NOMA, transmission or reception of a first data signal of the first user equipment and a second data signal of the second user equipment, and the second transmitter is configured for a superimposed non-orthogonal multiple access, NOMA, transmission or reception of a third data signal of the first user equipment and a fourth data signal of the second user equipment.

A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

Provided are a wireless communication apparatus and a reference signal generating method, wherein inter-cell interference is reduced inside and outside a CoMP set. A CoMP mode setting unit (101) sets whether the terminal (100) thereof is a CoMP terminal or a Non-CoMP terminal. When the terminal (100) is set as a Non-CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, from among all the ZC sequence numbers that can be used within the system. When the terminal (100) is set as a CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, by hopping the ZC sequence numbers to be used within the CoMP set. A ZC sequence generating unit (105) generates a ZC sequence to be used as an SRS, using the calculated ZC sequence number.

Various aspects of the disclosure relate to distributed multiple-input multiple-output (MIMO) communication such as coordinated beamforming or Joint MIMO. In some aspects, distributed MIMO is used to support communication in a cluster of wireless nodes (e.g., access points). A distributed MIMO scheduling scheme as taught herein is used to determine each wireless node (e.g., station) in the cluster that needs to be nulled by another wireless node (e.g., an access point). For example, one of the wireless nodes may obtain signal measurement information from the other wireless nodes and thereby generate a list of wireless nodes (e.g., access points) that need to null one or more wireless nodes (e.g., stations).

The method for inter-cell interference coordination of user equipment in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving service type information from a first evolved-NodeB (eNB); and relaying the service type information to a second eNB neighboring the first eNB, wherein the service type information comprises information about a service type to be provided by the first eNB, and may be information requesting protection of a specific resource region allocated for the service type.