A communication circuit supports a first communication protocol and a second communication protocol that is different from the first communication protocol. A number of signals include first signals conveying first information messages and second signals conveying second information messages. The first information messages include a repetitive message having fixed repeated content and the second information messages include a non-repetitive message having variable content. The first signals and the second signals are transmitted via the communication circuit using the first communication protocol for the first signals and the second communication protocol for the second signals.

The present disclosure relates to the mobile communications field, and in particular, to a synchronization signal sending method. A network device obtains a first signal after performing discrete Fourier transform (DFT) and orthogonal frequency division multiplexing (OFDM) modulation, or OFDM modulation on a Zadoff-Chu (ZC) sequence whose root index is 1. The network device obtains a second signal after performing DFT and OFDM modulation, or OFDM modulation on a conjugate sequence of the ZC sequence whose root index is 1. The network device generates a synchronization signal, where the synchronization signal includes the first signal and the second signal. The network device sends the synchronization signal to a terminal device.

The present disclosure relates generally to wireless communication systems, and more particularly, to a design for generating and utilizing orthogonal cover code (OCC) sequences for physical uplink control channel (PUCCH) transmissions. An exemplary method includes a user equipment (UE) selecting an orthogonal cover code (OCC) sequence for an uplink transmission, wherein the OCC sequence is selected from a first set of OCC sequences designed to achieve target peak to average power ratios (PAPRs) for a plurality of different modulation schemes; and transmitting the uplink transmission, via a wireless medium, with one of the modulation schemes using the selected OCC sequence.

Disclosed is a synchronization signal receiving method comprising a step of respectively receiving, from a plurality of base stations, a plurality of synchronization signals generated by using a predetermined repetition frequency, sequence, and phase pattern vector, measuring a start timing of a frame, a sequence index, and an index of the phase pattern vector by using the plurality of synchronization signals with respect to each of the plurality of base stations, selecting the base station having the highest correlation value calculated as a result of the measurement among the plurality of base stations, and establishing a connection with the selected base station, wherein the phase pattern vector repeatedly changes the phase of the sequence at the repetition frequency.

Various communication systems may benefit from improved uplink data transmission. A method may include determining an assignment, at a user equipment, of a first set of physical resource blocks in an unlicensed spectrum to a physical random access channel. The physical random access channel occupies at least one of the physical resource blocks, and wherein the at least one of the physical resource blocks occupied by the physical random channel are distributed into clusters in a frequency domain. The method may also include determining an assignment, when the user equipment transmits data, of a second set of at least one remaining physical resource block of the physical resource blocks to at least one uplink channel. In addition, the method can include transmitting random access preambles through the physical radio access channel or data through of the at least one the uplink channel from the user equipment to a network entity.

Methods and systems for obtaining improved joint channel estimates for a multi-user, frequency-multiplexed data transmission such as SC-FDMA or OFDM begins by estimating separate contributions of users (and/or other signal sources) to the received signal based on joint frequency domain channel estimates. A reduced data set is obtained by subtracting contributions of one or more users from the received data, leaving only the estimated contributions of the remaining users, with noise and residual estimation error signal. Time domain joint channel estimation is then performed on the reduced data set, which is feasible because the number of users has been reduced. In exemplary embodiments, the reduced data set includes only one estimated user contribution. This process is repeated to obtain channel estimates for all of the users. The method can be repeated by using the channel estimates to re-estimate the user contributions and calculate revised channel estimates.

An apparatus for use in an eNB, the apparatus includes circuitry to generate an assignment of one or more interlaces to a UE within a cell managed by the eNB, where the one or more interlaces are selected from a total number of interlaces, and an interlace of the total number of interlaces may include multiple resource blocks spanning within a system bandwidth. The circuitry included in the apparatus is further to encode the assignment by a bit string including one or more bits, which may be a bitmap or an encoding bit string. The circuitry included in the apparatus is further to transmit the bit string to the UE. Other embodiments may also be described and claimed.

A base station transmits, during a first period, a first plurality of voice packets of a first talking period on a first plurality of subcarriers of a first carrier. The base station transmits, during a second period, a second plurality of voice packets of a second talking period on a second plurality of subcarriers of a second carrier. The base station transmits, in the first period and the second period, data traffic packets on a third plurality of subcarriers. There is at least one guard band between at least two subcarriers in the third plurality of subcarriers.

For example, a first wireless station may be configured to perform hybrid beamforming training including simultaneously communicating a first plurality of spatially multiplexed Synchronization Signals (SS) beamformed in a plurality of wide beam directions; and simultaneously communicating a second plurality of spatially multiplexed SS beamformed in a plurality of narrow beam directions, which correspond to one or more reported wide beam directions.

A method for mapping, by a base station, a channel state information (CSI)-reference signal (RS) in a wireless communication system, includes mapping the CSI-RS, for at least one antenna port, to at least one pair of resource elements (REs) per physical resource block (PRB) pair in consecutive orthogonal frequency division multiplexing (OFDM) symbols in a subframe, wherein the subframe includes two slots, and each slot includes six OFDM symbols based on an extended cyclic prefix (CP), and transmitting the CSI-RS to a user equipment (UE) via the at least one antenna port in the subframe.