A terminal is disclosed including a transmitter that transmits a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK) on an uplink control channel; and a processor that determines a cyclic shift used in transmission of the HARQ-ACK, wherein: if the HARQ-ACK is a 1-bit NACK, the cyclic shift is calculated based on an index and if the HARQ-ACK is a 1-bit ACK, the cyclic shift is calculated based on a sum of the index and a number value, the number value being equal to 6. In other aspects, a radio communication method and a base station are also disclosed.

A method of wireless communication at a transmitting device includes adding parity check bits to a set of information bits. The method also includes generating a non-coherent transmission signal by mapping the parity check bits and the set of information bits into a sequence of complex symbols. Further, the method may include transmitting the non-coherent transmission signal to a receiving device. A method of wireless communication at a receiving device includes receiving, from a transmitting device, a non-coherent signal having at least one segment. Each segment comprises a sequence of complex symbols corresponding to information bits and parity check bits. The method also includes jointly detecting the sequences from each segment of the received non-coherent signal by using the parity check bits.

Methods, systems, and devices for wireless communications are described. A network may generate a pool of distinct base sequences for use with uplink messages from a user equipment (UE) to a base station, where each base sequence in the pool of distinct base sequences may have a peak to average power ratio below a threshold. A base station may assign the pool of distinct base sequences into groups of base sequences based on a group size and a hopping pattern reuse factor. The base station may assign the groups of base sequences to cells and signal the group size and a hopping pattern index to UEs in the cells. A UE in a cell may identify the group of base sequences assigned to the cell based on the signaled parameters and select a base sequence for use in transmitting an uplink message to the base station.

The present invention provides a transmission device, a reception device, a transmission method, and a reception method that implement an appropriate random access procedure in accordance with a propagation delay between a terminal and a base station. A terminal (100) is provided with a wireless transmission unit (103) which transmits a random access channel signal, and a control unit (107) which sets, from among a plurality of preamble sequence candidates, a preamble sequence for use in the random access channel signal. At least one of the plurality of preamble sequence candidates is composed of two or more mutually different code sequences.

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).

Wireless communications systems and methods related user multiplexing with discrete Fourier transform (DFT) precoded frequency interlaces are provided. A first wireless communication device identifies a first block-spreading code from a set of block-spreading codes associated with user multiplexing. The first wireless communication device communicates, with a second wireless communication device using a frequency interlace in a frequency spectrum, a first communication signal including a first block of information symbols spread across a set of resource blocks (RBs) within the frequency interlace based on the first block-spreading code. The first communication signal is generated by block-spreading the first block of information symbols based on the first block-spreading code to produce a first block of spread information symbols, performing a DFT on the first block of spread information symbols, and mapping the first block of spread information symbols to the set of RBs.

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.

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. A method may include receiving, from a base station associated with current cell, a transmission including information indicating a handover command that instructs the WTRU to handover to a target cell. The handover command may include information indicating a SH enablement indication and a SH parameter. The SH enablement indication may indicate that SH is enabled for a physical uplink control channel (PUCCH) transmission. A PUCCH transmission may be sent to a base station associated with the target cell, and the PUCCH transmission may include symbols derived from a sequence that is based on the SH parameter.

A method includes mapping, based on a first group-hopping associated with a first time resource, a first demodulation-reference signal (DM-RS) in a first symbol in the first time resource; mapping, based on a second group-hopping associated with the first time resource and with an offset, a second DM-RS in a second symbol in the first time resource; mapping, based on a third group-hopping associated with a second time resource, a third DM-RS in a third symbol in the second time resource; mapping, based on a fourth group-hopping associated with the second time resource and with an offset, a fourth DM-RS in a fourth symbol in the second time resource; and transmitting, to a second wireless user device, the first DM-RS, the second DM-RS, the third DM-RS, and the fourth DM-RS.

A UE in a wireless communication system is disclosed. The UE includes a communication module and a processor for controlling the communication module. The processor determines a first cyclic shift (CS) value based on hybrid automatic repeat request acknowledgment (HARQ-ACK) information representing a response to a downlink channel having been received from a base station, determines a CS offset based on request information representing a request to be transmitted from the UE to the base station, determines a second CS value representing a degree of cyclic-shifting a base sequence to be used in a physical uplink control channel (PUCCH) based on the first CS value and the CS offset, and transmits the PUCCH for simultaneous transmission of the request information and the HARQ-ACK information using a sequence generated by cyclic-shifting the base sequence based on the second CS value.