The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.

Embodiments are directed to systems and methods for communicating between nodes in a mobile ad hoc network. In one scenario, a node in a mobile ad hoc network communicates with another node in the network using both code division multiple access (CDMA) and frequency division duplexing. The communication is coded prior to transmission to the other node, and includes applying direct sequence spread spectrum (DSSS) modulation to a transmission signal at a specified bit rate over a specified spectrum. The DSSS coding is applied in accordance with a processing gain which spreads the spectrum relative to the bit rate of the transmission. The coded communication is then transmitted over a specified frequency band allocated to the node over which the node transmits data and over which the other node receives the data.

A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.

The present disclosure provides various modifications to existing techniques for transmitting ACK and/or NACK in an narrow band communications system. For example, in a first aspect, an apparatus receives a downlink transmission and transmits a single tone ACK on an ACK channel using time-spreading. In another aspect, an apparatus determines whether an ACK has been received from a UE within a threshold amount of time, and when an ACK has not been received from the UE for at least the threshold amount of time, transmitting an indication to the UE to transmit regarding the ACK.

Aspects herein describe determining a channel format for transmitting uplink communications in a slot, wherein the channel format is selected from multiple channel formats based at least in part on a payload size of the uplink communications, determining a starting symbol and an ending symbol of an uplink channel duration of the slot for transmitting the uplink communications, determining, based at least in part on the starting symbol and the ending symbol, a portion of the channel format to utilize in transmitting the uplink communications in the slot, and transmitting the uplink communications in the slot, wherein transmitting the uplink communications is based on the portion of the channel format.

Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.

The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.

A method and system for data transmission are disclosed, the method comprising: the network side transmits pre-scheduling authorization information and conflict resolution information to user equipment; and the network side receives data transmitted by the user equipment on the resource indicated by the pre-scheduling authorization information on the basis of the codebook configuration information carried in the conflict resolution information.

To enable a base station to select a more preferable codebook. A device includes: a communication unit configured to perform radio communication; and a control unit configured to perform control such that information regarding a codebook for multi-dimensionally modulating input data into a code or is transmitted from the communication unit to a base station.

To enable low latency uplink to be used in a more preferable mode can be provided. A device includes: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information is transmitted from the communication unit to a terminal, the control information indicating that a communication scheme in which data non-orthogonally multiplexed for a plurality of layers is demodulated through cancellation of interference between the layers and in which the data is transmitted from the terminal to a base station through a predetermined uplink resource, is available.