Transmission concept using multi-user superposition coding

A transmitter for transmitting a data signal with superposition with a further data signal of a further transmitter at a receiver seeking to receive at least the further data signal using multi-user superposition coding, the transmitter configured to

• send a phase shift estimation reference signal to the receiver;
• receive a phase shift compensation signal responsive to the phase shift estimation reference signal;
• and
• map data using a constellation in a manner phase shift compensated according to the phase shift compensation signal to acquire the data signal.

A receiver for receiving a wanted data signal from a served transmitter, the receiver configured to

• estimate a phase shift between channels via which the receiver receives the wanted data signal and a interfering data signal sent from a transmitter served by a further receiver in a manner superpositioned with the wanted data signal to acquire a phase shift information between the channels;
• send a phase shift compensation signal to the further base station so as to be forwarded to the further transmitter, the phase shift compensation signal depending on the phase shift information;
• and
• demap the wanted data signal by performing demapping on a superposition of the wanted and interfering data signals using multi-user superposition decoding to acquire an information data for the wanted data signal.

A method for receiving data signals from a plurality of transmitters using multi-user superposition coding, the method comprising

• estimate a phase shift between channels via which the receiver receives the data signals to acquire a phase shift information between the channels;
• send a phase shift compensation signal to at least one of the plurality of transmitters, the phase shift compensation signal depending on the phase shift information;
• and
• demap the data signals by performing demapping on a superposition of the data signals to acquire information data per data signal.

A method for transmitting a data signal with superposition with a further data signal of a further transmitter at a receiver seeking to receive at least the further data signal using multi-user superposition coding, the method comprising

• sending a phase shift estimation reference signal to the receiver;
• receiving a phase shift compensation signal responsive to the phase shift estimation reference signal;
• and
• mapping data using a constellation in a manner phase shift compensated according to the phase shift compensation signal to acquire the data signal.

A method for receiving a wanted data signal from a served transmitter, the method comprising

• estimate a phase shift between channels via which the receiver receives the wanted data signal and a interfering data signal sent from a transmitter served by a further receiver in a manner superpositioned with the wanted data signal to acquire a phase shift information between the channels;
• send a phase shift compensation signal to the further base station so as to be forwarded to the further transmitter, the phase shift compensation signal depending on the phase shift information;
• and
• demap the wanted data signal by performing demapping on a superposition of the wanted and interfering data signals using multi-user superposition decoding to acquire an information data for the wanted data signal.

A user entity for receiving a wanted data signal from a base station, the user entity configured to

• estimate a phase shift between channels via which the user entity receives the wanted data signal and an interfering data signal sent from a further user entity served by a further base station in a manner superpositioned with the wanted data signal to acquire a phase shift information between the channels;
• send a phase shift compensation signal to the base station so as to be forwarded to the further base station, the phase shift compensation signal depending on the phase shift information;
• and
• demap the wanted data signal by performing demapping on a superposition of the wanted and interfering data signals using multi-user superposition decoding to acquire an information data for the wanted data signal.

A method for receiving a wanted data signal from a base station, the method comprising

• estimating a phase shift between channels via which the user entity receives the wanted data signal and an interfering data signal sent from a further user entity served by a further base station in a manner superpositioned with the wanted data signal to acquire a phase shift information between the channels;
• sending a phase shift compensation signal to the base station so as to be forwarded to the further base station, the phase shift compensation signal depending on the phase shift information;
• and
• demapping the wanted data signal by performing demapping on a superposition of the wanted and interfering data signals using multi-user superposition decoding to acquire an information data for the wanted data signal.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for receiving data signals from a plurality of transmitters using multi-user superposition coding, the method comprising

• estimate a phase shift between channels via which the receiver receives the data signals to acquire a phase shift information between the channels;
• send a phase shift compensation signal to at least one of the plurality of transmitters, the phase shift compensation signal depending on the phase shift information;
• and
• demap the data signals by performing demapping on a superposition of the data signals to acquire information data per data signal,
• when said computer program is run by a computer.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for transmitting a data signal with superposition with a further data signal of a further transmitter at a receiver seeking to receive at least the further data signal using multi-user superposition coding, the method comprising

• sending a phase shift estimation reference signal to the receiver;
• receiving a phase shift compensation signal responsive to the phase shift estimation reference signal;
• and
• mapping data using a constellation in a manner phase shift compensated according to the phase shift compensation signal to acquire the data signal,
• when said computer program is run by a computer.