Hybrid orthogonal/non-orthogonal multiple access for radio signal transmission and reception

摘要

Provided are a receiver, a transmitter and a radio communication method capable of using non-orthogonal multiple access while suppressing cost increase and processing delay. A mobile station 200A receives non-orthogonal signals, also receives a reference signal to be used for interference cancellation, and extracts the non-orthogonal signal addressed to the mobile station 200A from the received non-orthogonal signals by demodulating and cancelling the radio signal addressed to another mobile station. In addition, the mobile station 200A demodulates the extracted non-orthogonal signal addressed to the mobile station 200A on the basis of the reference signal. The reference signal is multiplexed in the same radio resource block as a resource block allocated to the non-orthogonal signals, and is multiplexed in the radio resource block only when at least one signal is scheduled in the radio resource block.

主权项

1. A receiver comprising:
radio signal reception circuitry configured to receive radio signals including a plurality of non-orthogonal signals which are not orthogonal to each other; interference cancelation circuitry configured to extract a non-orthogonal signal addressed to the receiver from the plurality of non-orthogonal signals received by a communication interface by demodulating and cancelling a radio signal addressed to another receiver; and reference signal reception circuitry configured to receive a reference signal to be used by the interference cancellation circuitry to demodulate and cancel the radio signal addressed to the another receiver; and demodulation circuitry configured to demodulate the non-orthogonal signal extracted by the interference cancellation circuitry and addressed to the receiver, on the basis of the reference signal, wherein the reference signal is multiplexed in a same radio resource block as a radio resource block allocated to the non-orthogonal signals, and the reference signal is multiplexed in the radio resource block in a case where at least one of the plurality of non-orthogonal signals is scheduled in the radio resource block.