Symbol replica precision is improved when symbol-level cancellation is performed in a receiver in downlink non-orthogonal access. Transmission is performed by multiplexing a transmission scheme by which excellent performance is obtained during demodulation and a transmission scheme by which excellent performance is obtained during decoding. Provided is a base station device including an addition unit that adds a number of signals the number exceeding a number of transmit antenna ports at the same time and the same frequency, and performing transmission from one or more transmit antenna ports. The addition unit adds signals generated by mutually different transmission schemes. Provided is a terminal device that receives a signal in which a number of signals generated by mutually different transmission schemes are added, the number exceeding a number of transmit antenna ports, at the same time and the same frequency. The terminal device includes a demodulation unit that performs demodulation processing for at least one of the mutually different transmission schemes, a replica generation unit that generates a symbol replica by using an output from the demodulation unit, and a cancellation unit that subtracts the symbol replica from the received signal.

Symbol replica precision is improved when symbol-level cancellation is performed in a receiver in downlink non-orthogonal access. Transmission is performed by multiplexing a transmission scheme by which excellent performance is obtained during demodulation and a transmission scheme by which excellent performance is obtained during decoding. Provided is a base station device including an addition unit that adds a number of signals the number exceeding a number of transmit antenna ports at the same time and the same frequency, and performing transmission from one or more transmit antenna ports. The addition unit adds signals generated by mutually different transmission schemes. Provided is a terminal device that receives a signal in which a number of signals generated by mutually different transmission schemes are added, the number exceeding a number of transmit antenna ports, at the same time and the same frequency. The terminal device includes a demodulation unit that performs demodulation processing for at least one of the mutually different transmission schemes, a replica generation unit that generates a symbol replica by using an output from the demodulation unit, and a cancellation unit that subtracts the symbol replica from the received signal.

A wireless communication apparatus reducing power consumption of a large circuit size switch unit, includes a demultiplexing unit that separates an input multiplexed signal into plural signals for each input port, a prestage rearrangement unit that rearranges the plural signals input from the demultiplexing unit and outputs plural prestage rearranged signals for each input port, a switch unit that inputs the plural prestage rearranged signals output from the prestage rearrangement unit provided for each input port as plural signals before switching and applies switching processes to the plural signals before the switching to be output as plural switched signals for each output port, a poststage rearrangement unit that inputs and rearranges the plural switched signals output from the switch unit for each output port and outputs plural poststage rearranged signals for each output port, and a multiplexing unit that multiplexes the plural poststage rearranged signals for each output port.

A wireless communication apparatus reducing power consumption of a large circuit size switch unit, includes a demultiplexing unit that separates an input multiplexed signal into plural signals for each input port, a prestage rearrangement unit that rearranges the plural signals input from the demultiplexing unit and outputs plural prestage rearranged signals for each input port, a switch unit that inputs the plural prestage rearranged signals output from the prestage rearrangement unit provided for each input port as plural signals before switching and applies switching processes to the plural signals before the switching to be output as plural switched signals for each output port, a poststage rearrangement unit that inputs and rearranges the plural switched signals output from the switch unit for each output port and outputs plural poststage rearranged signals for each output port, and a multiplexing unit that multiplexes the plural poststage rearranged signals for each output port.

A method for sending beacon signals is provided. The beacon signals are to be received by a slave device to discover the master device for Device to Device communication. The master device receives information from a network node. The information informs about a set of available peer discovery resources to be used in a peer discovery frame by the master device for sending beacon signals. The beacon signals are detected by the slave device. The master device obtains a beacon transmission probability. At each specific peer discovery frame, the master device determines according to the beacon transmission probability, whether or not a beacon signal shall be transmitted during that specific peer discovery frame. When determining to transmit a beacon signal during that specific peer discovery frame, master device sends the beacon signal by choosing one of the peer discovery resources out of the received set of available peer discovery resources.

Methods and apparatus for subframe configuration and generation in a multi-cell multi-carrier system. A frame for radio transmission in the system consists of multiple subframes, and each subframe consists of multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols. Training symbols, frequency-domain data scrambling, size of Fast-Fourier Transform (FFT), or length of cyclic prefix can be configured differently for each subframe to facilitate different applications, such as unicasting or broadcasting.

Systems and methods for same frequency/band repeaters for satellite and terrestrial links. One system includes a satellite antenna, a terrestrial antenna, a satellite transceiver coupled to the satellite antenna, a terrestrial transceiver coupled to the terrestrial antenna, and a controller communicatively coupled to transceivers. The controller is configured to receive a satellite downlink signal having a first frequency. The controller is configured to receive a plurality of terrestrial return link signals from a plurality of user terminals, the plurality of uplink signals having a second frequency. The controller is configured to generate a repeated, terrestrial downlink signal based on the satellite downlink signal. The controller is configured to generate a repeated satellite uplink signal that is a linearly amplified version of the combined terrestrial uplink signals. The controller is configured to transmit the repeated downlink signal at the first frequency. The controller is configured to transmit the combined uplink signal at the second frequency.

Systems and methods for same frequency/band repeaters for satellite and terrestrial links. One system includes a satellite antenna, a terrestrial antenna, a satellite transceiver coupled to the satellite antenna, a terrestrial transceiver coupled to the terrestrial antenna, and a controller communicatively coupled to transceivers. The controller is configured to receive a satellite downlink signal having a first frequency. The controller is configured to receive a plurality of terrestrial return link signals from a plurality of user terminals, the plurality of uplink signals having a second frequency. The controller is configured to generate a repeated, terrestrial downlink signal based on the satellite downlink signal. The controller is configured to generate a repeated satellite uplink signal that is a linearly amplified version of the combined terrestrial uplink signals. The controller is configured to transmit the repeated downlink signal at the first frequency. The controller is configured to transmit the combined uplink signal at the second frequency.

There is provided an apparatus, said apparatus comprising means for receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and using the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area.

There is provided an apparatus, said apparatus comprising means for receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and using the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area.