Communication device and method used for multi-user spatial modulation

A communication device, comprising:

• a processing circuit, configured to:
• perform successive interference cancellation on a received transmission signal, detect signals for other communication devices and cancel the detected signals as interference, until a modulation symbol for the communication device per se is detected and a sequence number of a first channel that has transmitted the received transmission signal is detected;
• and
• map the sequence number of the first channel to a first portion of information bits for the communication device per se based on a predetermined mapping rule, and determine a second portion of information bits for the communication device per se based on the modulation symbol for the communication device per se.

A method performed by a communication device, comprising:

• mapping a first portion of information bits for a first receiving end communication device to a first channel and mapping a first portion of information bits for a second receiving end communication device to a second channel based on a predetermined mapping rule, in order to perform spatial modulation for the first portions of information bits for the first receiving end communication device and the second receiving end communication device;
• allocating a first transmission power to the first receiving end communication device and a second transmission power to the second receiving end communication device;
• and
• controlling to transmit a second portion of information bits for the first receiving end communication device at the first transmission power over the first channel, and control to transmit a second portion of information bits for the second receiving end communication device at the second transmission power over the second channel,
• wherein the first channel and the second channel are a same channel in the case where the first portion of information bits for the first receiving end communication device and the first portion of information bits for the second receiving end communication device are the same.