Disclosed is a method for transmitting a downlink pilot, which serves to solve the problem that the power of Orthogonal Frequency Division Multiplexing (OFDM) symbols is different due to Walsh codes. The method includes: transmitting a dedicated pilot in the Code Division Multiplexing (CDM) approach or in the combination approach of CDM and Frequency Division Multiplexing (FDM); further, in the resources for transmitting the dedicated pilot, configuring an orthogonal resources for the dedicated pilot according to a set mapping rule.

The present disclosure relates to an apparatus and method supportive of distributed turbo coding based on relay network utilizing a noisy network coding scheme. For this, included is a relay node operating as a component encoder to relay a signal from a source node to a next node in a distributed turbo coding scheme. The relay node quantizes the signal transmitted from the source node and then interleaves the quantized signal using a predetermined pattern to distinguish the signal transmitted from the source node from a signal to be output from an opposing node, so that the signal transmitted from the source node is relayed to the next node based on a noisy network coding scheme.

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for allowing for the coexistence of legacy and non-legacy PUCCH formats. An example method generally includes generating a first orthogonal sequence for a first payload for a physical uplink control channel (PUCCH) to be transmitted; generating a second orthogonal sequence for a second payload for the PUCCH to be transmitted; mapping the first orthogonal sequence to a first set of virtual resources and the second orthogonal sequence to a second set of virtual resources; mapping the first set of virtual resources to a first set of physical resources and the second set of virtual resources to a second set of physical resources; and transmitting the first and second payloads for the PUCCH on the first and second sets of physical resources.

A method and apparatus are provided for updating a sequence hopping (SH) pattern of an uplink channel during handover from a current cell having a current SH pattern. At least one downlink channel of each neighbor cell of the current cell is monitored. Information indicative of the monitored downlink channels of the neighbor cells is transmitted to the current cell. Prior to receiving a handover command from the current cell a target cell from among the neighbor cells is anticipated and a common downlink channel of the anticipated target cell is monitored to determine information representative of a target SH pattern of the target cell.

Provided are a method and device for determining a sequence group and a method and device for determining a cyclic shift. The method includes: determining a symbol index of a first specified orthogonal frequency division multiplexing (OFDM) symbol in a scheduling unit; and determining a sequence group or cyclic shift used by a channel or a signal according to the symbol index.

A system includes a first device to select and transmit a first code by a transmitter to a remote device; the remote device implements a sequence detector based on the first code; the transmitter in the first device generates a first sequence based on the first code; the sequence detector in the remote device detects the first sequence and activates the mechanism based on the detection; the first device may be a smartphone or a smart watch.

Provided is a method for transmitting, by a user equipment (UE), a demodulation reference signal (DMRS) for a physical uplink shared channel (PUSCH) in a wireless communication system. A terminal receives a cyclic shift field, which indicates a first value and a second value, through a physical downlink control channel (PDCCH) from a base station, generates a first DMRS sequence and a second DMRS sequence, which are associated with a first layer and a second layer respectively, by using a first cyclic shift and a second cyclic shift, respectively, which are determined based on the first value and the second value respectively, and transmits the first DMRS sequence and the second DMRS sequence to the base station. Furthermore, the first value and the second value are separated by a maximum value corresponding to a total number of possible cyclic shifts.

A method of configuring a positive acknowledgement (ACK) or negative acknowledgement (NACK) in a wireless communication system based on time division duplex (TDD) in which M, M=4, downlink subframes are associated with an uplink subframe. The method is performed by a user equipment receiving a physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH). The user equipment receives at least one downlink transport block in the M downlink subframes from a first serving cell. The user equipment determines ACK/NACK states {HARQ-ACK(1), HARQ-ACK(2), HARQ-ACK(3), HARQ-ACK(4)} for the first serving cell. The use equipment determines an ACK/NACK response based on the ACK/NACK states.

Provided is a radio communication device which can make Acknowledgement (ACK) reception quality and Negative Acknowledgement (NACK) reception quality to be equal to each other. The device includes: a scrambling unit (214) which multiplies a response signal after modulated, by a scrambling code “1” or “e.sup.−j(π/2)”, so as to rotate a constellation for each of response signals on a cyclic shift axis; a spread unit (215) which performs a primary spread of the response signal by using a Zero Auto Correlation (ZAC) sequence set by a control unit (209); and a spread unit (218) which performs a secondary spread of the response signal after subjected to the primary spread, by using a block-wise spread code sequence set by the control unit (209).

A terminal that communicates with a base station monitors a physical downlink control channel allocated in a physical downlink control channel region and an enhanced physical downlink control channel allocated in a physical downlink shared channel region different from the physical downlink control channel region. If the physical downlink control channel is detected, the terminal reports response information via a physical uplink control channel resource corresponding to the resource in which the physical downlink control channel was detected. If the enhanced physical downlink control channel is detected, the terminal reports via a prescribed physical uplink control channel resource.