A method and system of communicating between a plurality of nodes are provided. The plurality of nodes are part of a cooperative broadcast multi-hop network that employs broadcast flood routing and multi-hop transmission using a direct-sequence spread-spectrum (DSSS) waveform.

A method includes receiving an input via a processor of the computing device. The input corresponds to data to be transmitted. The method further includes encoding the data to generate spreading codes corresponding at least in part to the data. The method further includes mapping the spreading codes to one or more frequency subcarriers of a plurality of frequency subcarriers, generating a transmit signal based at least in part on the one or more frequency subcarriers, and transmitting the transmit signal via an electrode capacitively coupled to a physical body. The transmit signal is transmitted from the electrode through the physical body.

A method for transmitting a broadcast signal includes encoding service data; encoding signaling data; building one or more signal frames including one or more data symbols carrying the encoded service data and one or more preamble symbols carrying the encoded signaling data; modulating the one or more preamble symbols and the one or more data symbols into one or more preamble Orthogonal Frequency Division Multiplex (OFDM) symbols and one or more data OFDM symbols by an OFDM scheme; normalizing average power of the one or more preamble OFDM symbols and the one or more data OFDM symbols in time domain using power normalization factors. Further, a power normalization factor for a preamble OFDM symbol is obtained using frequency domain total power of the preamble OFDM symbol in frequency domain, the frequency domain total power of the preamble OFDM symbol is 7737.10 when a Fast Fourier Transform (FFT) size is 8K, a guard interval length is 1024 samples, separation of scattered pilot bearing carriers is 3 carriers and carrier reduction (Cred) coefficient is 0 for the preamble OFDM symbol. The method also includes transmitting the broadcast signal having OFDM symbols including the one or more preamble OFDM symbols and the one or more data OFDM symbols.

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

There is disclosed a method of operating a radio node in a wireless communication network, the method including communicating based on a signaling structure, the signaling structure including a number R of long symbols and/or a number Nsym of regular symbols, wherein R and/or Nsym is based on the subcarrier spacing associated to the signaling structure and/or a cyclic prefix length of a long symbol and/or a cyclic prefix length of a regular symbol. The disclosure also pertains to related devices and methods.

Methods, systems, and devices for wireless communications are described for indication of one or more symbol structures for one or multiple subsets of a set of symbols. The one or more symbol structures may include one or more guard interval (GI)-based symbol formats that are to be applied to one or more of the subsets of symbols. Different symbol formats may be indicated for different subsets of symbols, and a first subset of symbols may use a GI-based symbol format and a second subset of symbols may use a CP-based or GI-based symbol format. A base station may transmit control signaling to a user equipment to indicate one or more symbol structures for the one or more subsets of symbols, and the UE and the base station may communicate data in one or more slots in accordance with the indicated symbol structures based on the control signaling.

A wideband chaotic waveform that is rateless in that it may be modulated at virtually any rate and has a minimum of features introduced into the waveform. Further, the waveform provided may be operated below a signal to noise ratio wall to further enhance the LPD and LPE aspects, thereof. Additionally, the present disclosure may provide a mix of coherent and non-coherent processing techniques applied to signal samples to efficiently achieve coarse synchronization with a waveform that is faster, more efficient and more accurate than using time domain signal correlators alone.

There is disclosed a method of operating a radio node in a wireless communication network, the method including communicating based on a signaling structure, the signaling structure including a number R of long symbols and/or a number Nsym of regular symbols, wherein R and/or Nsym is based on the subcarrier spacing associated to the signaling structure and/or a cyclic prefix length of a long symbol and/or a cyclic prefix length of a regular symbol. The disclosure also pertains to related devices and methods.

A terminal capable of reducing the resource regions in an uplink component band without increasing signaling even if a plurality of acknowledgment signals to downlink data transmitted respectively in a plurality of downlink component bands are transmitted from one uplink component band. A terminal (200) for making communication using the plurality of downlink component bands, wherein a PCFICH reception section (208) obtains CFI information indicating the number of symbols used for a control channel to which resource allocation information relating to downlink data addressed to a device is allocated for each of the downlink component bands, a mapping section (214); sets a resource region to which an acknowledgment signal to the downlink data is allocated for each of the plurality of downlink component bands according to the CFI information of each of the downlink component bands in an uplink component band set to the device, and maps the acknowledgment signals into the resource regions corresponding to the downlink component bands used for the allocation of the downlink data.

A method is provided for use in a cooperative broadcast multi-hop network that employs broadcast flood routing and multi-hop transmission using a direct-sequence spread-spectrum (DSSS) waveform. DSSS signals are received from other nodes on different channels. ASSW is performed to detect and remove interference signals received on the different channels. MDFT analysis banks each receive a beam in the spectral domain that can be channelized to generate a channelized beam that comprises multiple spectral channels. An adaptive interference mitigation space-frequency whitener module can then be applied to remove interference and generate interference-mitigated spatial-spectral domain channels. MDFT synthesis banks can each perform a MDFT synthesis operation on one of the spatial-spectral domain channels. A multi-user RAKE receiver can then combine the interference mitigated time-domain channelized signals to generate a subset (1 . . . F) of fingers that combine components of transmissions directly received from the other nodes and multipath components of those transmissions.