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.

Provided are a base station apparatus, a terminal apparatus, and a communication method, in all of which interference is reduced to improve throughput and to increase more opportunity for communication by each terminal apparatus. A terminal apparatus according to the present invention is provided with a function of receiving information relating to a multiplexed state of and information relating to a retransmission state of a transmit signal that is transmitted to the terminal apparatus itself; a function of receiving a non-orthogonal multiplexing signal that results from a base station apparatus non-orthogonally multiplexing at least some of the transmit signal that is transmitted to the terminal apparatus itself and a transmit signal that is transmitted to another terminal apparatus, for transmission, using the same radio resource; and a function of performing demodulation processing based on the information relating to the multiplexed state of the transmit signal that is transmitted to the terminal apparatus itself, and the information relating to the retransmission state of the transmit signal that is transmitted to the terminal apparatus itself.

Provided is a wireless communication apparatus for a non-orthogonal multiple access communication system. The apparatus comprises: a power adjustment unit which is used, for at least some of user equipment included in the communication system, dynamically adjusting the sending power of each of the at least some of the user equipment for each sub-carrier according to channel state information about the communication system, in order that the at least some of the user equipment perform uplink data transmission on corresponding sub-carriers with the adjusted sending power. According to the disclosed apparatus, method and system, at least one of the following technical benefits could be obtained: increasing the channel capacity of the communication system; reducing the bit error rate during the communication; and reducing the interference between corresponding user equipment in the communication system.

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.