Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first user equipment (UE) includes transmitting, to a second UE, a first sidelink synchronization block (S-SSB) in a first subset of a bandwidth, wherein the first S-SSB comprises a first sequence shift and a first identifier associated with the first UE and transmitting, to the second UE, one or more additional S-SSBs in one or more additional subsets of the bandwidth, wherein the one or more additional S-SSBs comprises at least one of a second sequence shift different from the first sequence shift or a second identifier associated with the first UE different from the first identifier associated with the first UE.

Techniques, schemes and examples pertaining to sequence design for synchronization and device identification in mobile communication systems are described. A processor of an apparatus generates a set of root sequences and also generates a set of signature sequences from the set of root sequences. The processor then transmits a signal comprising one or more of the signature sequences to a receiving device via a wireless channel. Each signature sequence of the set of signature sequences identifies the apparatus.

The present application discloses a method in which a base station transmits a reference signal sequence in a wireless communication system. In detail, the method comprises the steps of: generating a pseudo-random sequence using a first m-sequence and a second m-sequence; generating the reference signal sequence using the pseudo-random sequence; and transmitting the reference signal to a mobile station via antenna ports different from one another. The second m-sequence has an initial value containing parameters for discriminating reference signal sequences among users.

The present invention relates to a controller, an access node, an aggregation node and methods thereof in a radio communication network. The controller comprises: a processor configured to select a plurality of spreading codes that are non-orthogonal or short orthogonal, and a transmitter coupled with the processor. The transmitter is configured to notify at least one of an access node or an aggregation node of the plurality of spreading codes.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

Various additional and alternative aspects are described herein. In some aspects, the present disclosure provides a method of communication by an apparatus. The method includes selecting one or more resources for transmitting data of a first data stream based on an acyclic graph. The selected resources conform to the acyclic graph comprising data streams at odd levels of the acyclic graph and resources at even levels of the acyclic graph. The acyclic graph includes edges between each level of the acyclic graph. The edges connect the resources allocated to each data stream. The method further includes transmitting the data of the first data stream on the selected one or more resources.

Methods and apparatus related to pulse shaped and overlapped reference signals are disclosed. Signaling that indicates information associated with a length of a base sequence and a length of a cyclic rotation is communicated between a first communication device and a second communication device in a wireless communication network. A DMRS is also communicated in the wireless communication network. The DMRS comprises a DMRS sequence of a target length, and the DMRS sequence comprises the base sequence cyclically rotated by the length of the cyclic rotation. Cyclic extension is also applied a base sequence in some embodiments.

The present specification provides a method for generating a low peak to average power ratio (PAPR) sequence in a wireless communication system. Specifically, the present specification relates to a method for generating a low PAPR sequence in a wireless communication system, the method comprising the steps of: generating a sequence of length-6 having a symbol as each element of the sequence; and generating the low PAPR sequence on the basis of the sequence of length-6.

Methods, systems, and devices are described for orthogonal modulation of signals using maximal length sequences and Hadamard transforms. Modulation symbols to be transmitted are arranged into sequences indexed from 1 to 2.sup.n1 for some integer n. A constant is added to the beginning of each sequence, which is then multiplied by a Hadamard matrix of size 2.sup.n2.sup.n. The resulting sequences will be orthogonal and will have a first value of zero. The first value is discarded, and the sequence are reordered and associated with m-sequences. The signal is then transmitted. A cyclic prefix may also be transmitted. Upon receiving the transmission, a receiver may discard the cyclic prefix or use it for channel equalization. The receiver may then reorder the received signal, insert a zero, apply the 2.sup.n2.sup.n Hadamard transform, discard the zero, and order the sequences again according to the index to retrieve the data.

An apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: generate (606) a synchronization signal for transmission over one or more symbols, wherein the number of symbols is dependent on a subcarrier spacing.