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). A method for channel-related information feedback in a beamforming system, performed by a transmitter is provided. The method includes determining whether a receiver is to feed back gain information about an effective channel established between the transmitter and the receiver using channel-related information between the transmitter and the receiver, notifying the receiver of a feedback mode indicating whether the gain information is to be fed back, upon receipt of feedback information configured based on the feedback mode from the receiver, reconfiguring the effective channel based on the feedback information, and transmitting a signal on the reconfigured effective channel.

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). The method includes: receiving information on a battery threshold of a terminal from a base station; determining whether to use a reception beam width wider than a currently used reception beam width, by comparing a battery level of the terminal with the battery threshold; transmitting additional resource request information to the base station when it is determined that a wider reception beam width is used; and when an additional resource corresponding to the additional resource request information is allocated from the base station, blocking a power supply of at least one antenna reception circuit among multiple antenna reception circuits corresponding to multiple antenna elements in order to form at least one reception beam having the wide reception beam width.

Abstract: The present invention relates to a single frequency synthesizer based FDD transceiver. A single frequency synthesizer generates and provides a carrier frequency so that frequency up-conversion and frequency down-conversion can be performed at the time of transmission and reception. Accordingly, the area, power consumption, and design complexity of the entire system can be reduced, and the performance of the system can be improved.

Abstract: A signal reception apparatus in a communication system supporting a beam forming scheme is provided. The signal reception apparatus includes a Low Noise Amplifier (LNA) configured to generate a second signal by amplifying a first signal according to a first gain value, a Variable Gain Amplifier (VGA) configured to generate a third signal by amplifying the second signal according to a second gain value, and an Automatic Gain Controller (AGC) configured to control the first gain value and the second gain value by considering a plurality of beam types supported in a signal transmission apparatus.

Abstract: The present disclosure is related to a 5th generation (5G) or pre-5G communication system to provide higher data rates than a 4th generation (4G) communication system such as long term evolution (LTE). A method for adjusting a receive beam gain by a user equipment (UE) in a wireless communication system is provided. The method includes estimating a received signal quality value based on a reference signal received from a base station (BS), transmitting information about the estimated received signal quality value to the BS, comparing the received signal quality value with a minimum received signal quality value required for successful reception of data from the BS, and adjusting a receive beam gain to be used for data reception by turning on/off a radio frequency (RF) chain formed for each of antennas included in the UE based on a result of the comparison.

Abstract: A method and an apparatus for transmitting and receiving an uplink signal by a mobile terminal in a wireless communication system are provided. The first mobile terminal includes a receiver configured to receive, from a base station, a power control variable determined based on an interference value for a first receive beam used in order to receive an uplink signal of the first mobile terminal from among a plurality of receive beams of the base station, to receive, from the base station, neighboring receive beam allocation data indicating whether any of the receive beams in the plurality of receive beams, different from the first receive beam, is being used for uplink signal reception, to determine an uplink transmit power value based on the received power control variable and neighboring receive beam allocation data, and to transmit an uplink signal to the base station by using the determined uplink transmit power value.

Abstract: A Channel Quality Indicator (CQI) channel management in a broadband wireless communication system is provided. Operations of a base station include determining a CQI channel operation mode for a CQI channel of a terminal which enters a sleep mode; transmitting at least one message which instructs to enter the sleep mode and includes information indicating the CQI channel operation mode; and managing the CQI channel of the terminal according to the CQI channel operation mode while the terminal operates in the sleep mode.

Abstract: A method of supporting communication of a terminal in a first base station of a beamforming system is provided. The method includes determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell, and transmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations.

Abstract: Provided is a method for transmitting a transmission symbol in a transmitting device supporting a filter bank multi carrier (FBMC) scheme. The method includes generating a training symbol by including a training signal in at least one of an odd symbol and an even symbol constituting the training symbol; generating the transmission symbol by delay-overlapping the training symbol and at least one data symbol; and transmitting the transmission symbol.

Abstract: A method for operating a terminal in a wireless communication system is provided. The method includes determining a candidate group of serving distributed small base stations and determining feedback bits for maximizing an expected average rate when a service is provided from a distributed small base station that belongs to the candidate group of serving distributed small base stations.

Abstract: Disclosed is a method and device for transmitting and receiving a signal by using modulation techniques in a wireless communication system. The method according to the present invention includes: selecting one of QAM and improved QAM according to at least one predefined criterion; encoding information bits to be transmitted according to a first encoding scheme and mapping encoded information bits to QAM symbols when the QAM is selected; encoding information bits to be transmitted according to a second encoding scheme and mapping encoded information bits to improved QAM symbols when the improved QAM is selected; and transmitting the QAM symbols or the improved QAM symbols through a given resource region.

Abstract: The inventive concept relates to a wireless communication receiver. The wireless communication receiver includes a second off-chip RF filter, an RF-to-digital converter and a digital pre-processor processing a signal converted into a digital. The RF-to-digital converter converts an RF signal being received into a digital signal of DC frequency band or intermediate frequency band and has a dynamic range that can process a wanted RF band signal and unwanted signals near to the wanted RF band signal. The digital pre-processor digitally controls a signal gain to transmit it to a modulator/demodulator.

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). A base station and method thereof are provided for hybrid automatic retransmit request (HARQ) feedback in a wireless communication system. A method includes generating transmission beam information for transmitting hybrid automatic retransmit request (HARQ) feedback information for an uplink data packet received from a terminal; scheduling a HARQ feedback channel in a downlink subframe, based on the transmission beam information; and transmitting the HARQ feedback information, based on the HARQ feedback channel.

Abstract: An apparatus and method for selecting the best beam in a wireless communication system are provided. An operation of a Base Station (BS) includes repeatedly transmitting reference signals beamformed with a first width, receiving a feedback signal indicating at least one preferred-beam having the first width from at least one terminal, determining a direction range within which reference signals beamformed with a second width are to be transmitted and a transmission pattern, based on the at least one preferred-beam having the first width, repeatedly transmitting the reference signals beamformed with the second width within the determined direction range according to the transmission pattern, and receiving a feedback signal indicating at least one preferred-beam having the second width from the at least one terminal.

Abstract: A method for performing synchronization by a device in a device to device (D2D) communication system is provided. The method includes transmitting a first synchronization signal, and transmitting offset information indicating a time difference between a synchronization reference time of the first synchronization signal and a transmission time of the first synchronization signal.

Abstract: Provided is a distributed scheduling method and apparatus for resource allocation for Device-to-Device (D2D) communication. The method includes sending, by a Mobile Station (MS) including data to transmit, a first resource reservation message through at least one first slot among a plurality of slots constituting a resource reservation unit in a resource reservation channel; and when a second resource reservation message sent by another MS is not sensed in a slot with a higher priority than the first slot in the resource reservation unit, transmitting the data through a transmission resource unit corresponding to the resource reservation unit in a data transmission channel. The resource reservation channel corresponds to the transmission resource unit, and the plurality of slots has mutually cyclic priorities.

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). A method for performing device-to-device (D2D) communication by an in-coverage user equipment (UE) in a cellular communication system is provided. The method includes receiving a scheduling grant through a downlink control channel from a base station (evolved Node B (eNB)) and transmitting a scheduling assignment (SA) message in an SA region of a D2D communication frame and data in a data region of the D2D communication frame, based on the scheduling grant, wherein the scheduling grant indicates a resource pattern for transmission (RPT) corresponding to a set of resource units or a subset of a resource unit in a time domain and a frequency domain that is used for transmission of the data.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system rt to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and method for acquiring synchronization information through the transmission and reception of signals between devices for device to device (D2D) communication is provided. A method for a user equipment (UE) in a wireless communication system includes detecting a synchronization signal of another UE in a predetermined measurement gap. The method also includes transmitting a detected result of the synchronization signal to an evolved Node B (eNB). A start time point of the measurement gap in a first measurement gap period and a star(time point of the measurement gap in a second measurement gap period are different from each other.

Abstract: A synchronization method and an apparatus for Device-to-Device (D2D) communication in a User Equipment (UE) are provided. The method includes comparing a reception power of a signal received from an evolved Node B (eNB) with a first reference power, if the reception power is less than the first reference power, generating and transmitting a synchronization signal for D2D communication by operating as a synchronization reference UE, comparing the reception power of a signal received from the eNB with a second reference power, and if the reception power is greater than or equal to the first reference power and less than the second reference power, relaying a synchronization signal received from the eNB by operating as a synchronization relaying UE.

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). An apparatus and a method for searching neighboring cells in a wireless communication system are provided. The method includes receiving, from adjacent base stations, a part of a first set of reference signals that are beamformed using different transmission beams arranged in a first order, the part of the first set of the reference signals being received during a first measurement interval in a first time interval, and receiving, from the adjacent base stations, a part of a second set of the reference signals that are beamformed using different transmission beams arranged in a second order, which is different from the first order, the part of the second set of the reference signals being received during a second measurement interval in a second time interval.