Abstract: An electronic device includes processing circuitry configured to calculate an intra metric based on cross correlation of first reference signal symbols (RSs) included in a first precoding resource block group (PRG) to which a target resource element (RE) belongs, calculate an inter metric based on cross correlation of one or more second RSs and one or more among the first RSs, the one or more second RSs being included in a second PRG adjacent to the first PRG along a frequency axis of a physical channel, the one or more second RSs being in proximity to the target RE, and the physical channel being received from a base station, compare a first ratio between the intra metric and the inter metric with a threshold ratio to obtain a comparison result, and determine a channel estimation mode with respect to the target RE based on the comparison result.

Abstract: A method by which a terminal reports hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) feedback in a wireless communication system, according to one embodiment of the present disclosure, comprises the steps of: detecting downlink data; and transmitting HARQ ACK/NACK information for the downlink data, wherein the HARQ ACK/NACK information can include a bit selected from a HARQ ACK/NACK bit information group in which the number of states of a bit indicating ACK and the number of states of a bit indicating NACK are different.

Abstract: A method for reporting a channel state in a wireless communication system according to an embodiment of the present disclosure, the method being performed by a terminal, and comprising the steps of: the terminal receiving a channel state reporting-related configuration with respect to a plurality of bandwidth parts (BWPs) that are performing BWP adaptation or switching; and reporting channel state information with respect to the plurality of BWPs according to the received configuration, wherein the channel state information with respect to the plurality of BWPs includes channel state information with respect to BWPs that are not activated, the plurality of BWPs include a first BWP and a second BWP of which at least a part is overlapped with the first BWP and which has a smaller size than the first BWP, the size of a sub-band of the first BWP corresponds to a multiple of the size of a sub-band of the second BWP, and the sub-band of the first BWP can completely include the sub-band of the second BWP.

Abstract: A wireless communication device and a channel estimating method thereof are provided. A wireless communication device includes an interlayer interference detector configured to receive a reference signal including a plurality of layers transmitted through a plurality of ports respectively connected to a plurality of antennas and to determine whether interlayer interference occurs based on the reference signal; and a channel estimator configured to estimate a channel matrix by executing an algorithm that is based on whether the interlayer interference occurs. The wireless communication device may decode a receive signal based on the estimated channel matrix.

Abstract: In a method for supporting a short transmission time interval (sTTI) in a wireless communication system according to one embodiment of the present invention, the method is performed by a terminal, and comprises the steps of: receiving a reference signal for decoding a downlink channel; and decoding the downlink channel by using the reference signal for decoding the downlink channel, wherein the reference signal for decoding the downlink channel may be transmitted by using a pattern to which a frequency separation is applied, in the case of collision with a cell-specific reference signal.

Abstract: A wireless communication device and a channel estimating method thereof are provided. A wireless communication device includes an interlayer interference detector configured to receive a reference signal including a plurality of layers transmitted through a plurality of ports respectively connected to a plurality of antennas and to determine whether interlayer interference occurs based on the reference signal; and a channel estimator configured to estimate a channel matrix by executing an algorithm that is based on whether the interlayer interference occurs. The wireless communication device may decode a receive signal based on the estimated channel matrix.

Abstract: A method by which a terminal reports hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) feedback in a wireless communication system, according to one embodiment of the present disclosure, comprises the steps of: detecting downlink data; and transmitting HARQ ACK/NACK information for the downlink data, wherein the HARQ ACK/NACK information can include a bit selected from a HARQ ACK/NACK bit information group in which the number of states of a bit indicating ACK and the number of states of a bit indicating NACK are different.

Abstract: A method for reporting a channel state in a wireless communication system according to an embodiment of the present disclosure, the method being performed by a terminal, and comprising the steps of: the terminal receiving a channel state reporting-related configuration with respect to a plurality of bandwidth parts (BWPs) that are performing BWP adaptation or switching; and reporting channel state information with respect to the plurality of BWPs according to the received configuration, wherein the channel state information with respect to the plurality of BWPs includes channel state information with respect to BWPs that are not activated, the plurality of BWPs include a first BWP and a second BWP of which at least a part is overlapped with the first BWP and which has a smaller size than the first BWP, the size of a sub-band of the first BWP corresponds to a multiple of the size of a sub-band of the second BWP, and the sub-band of the first BWP can completely include the sub-band of the second BWP.

Abstract: In a method for supporting a short transmission time interval (sTTI) in a wireless communication system according to one embodiment of the present invention, the method is performed by a terminal, and comprises the steps of: receiving a reference signal for decoding a downlink channel; and decoding the downlink channel by using the reference signal for decoding the downlink channel, wherein the reference signal for decoding the downlink channel may be transmitted by using a pattern to which a frequency separation is applied, in the case of collision with a cell-specific reference signal.