Receiver, transmitter and radio communication method

A receiver comprising:

• a radio signal reception unit configured to receive radio signals including a plurality of non-orthogonal signals which are not orthogonal to each other and are transmitted by using part or all of orthogonal resources being a plurality of radio resources orthogonal to each other;
• an interference cancelation unit configured to extract the orthogonal resource including the non-orthogonal signal addressed to the receiver from the radio signals received by the radio signal reception unit, and extract the non-orthogonal signal addressed to the receiver from a plurality of non-orthogonal signals included in the extracted orthogonal resource, by demodulating and canceling the radio signal addressed to another receiver;
• and
• a demodulation unit configured to demodulate the non-orthogonal signal extracted by the interference cancelation unit and addressed to the receiver.

A radio communication method comprising the steps of:

• receiving radio signals by a communication device, the radio signals including a plurality of orthogonal signals which are orthogonal to each other, and a plurality of non-orthogonal signals which are not orthogonal to each other;
• extracting, by the communication device, the non-orthogonal signal addressed to the communication device from the plurality of non-orthogonal signals by demodulating and cancelling the radio signal addressed to another receiver by use of the orthogonal signals included in the received radio signals;
• and
• demodulating, by the communication device, the signal included in the orthogonal signals and addressed to the communication device and the non-orthogonal signal extracted in the extracting step and addressed to the communication device.

A radio communication method comprising the steps of:

• receiving radio signals by a communication device, the radio signals including a plurality of non-orthogonal signals which are not orthogonal to each other and are transmitted by using part or all of orthogonal resources being a plurality of radio resources orthogonal to each other;
• extracting, by the communication device, the orthogonal resource including the non-orthogonal signal addressed to the communication device from the received radio signals, and extracting, by the communication device, the non-orthogonal signal addressed to the communication device from a plurality of non-orthogonal signals included in the extracted orthogonal resource, by demodulating and canceling the radio signal addressed to another receiver;
• and
• demodulating the extracted non-orthogonal signal addressed to the communication device by the communication device.