Technique for coherent data communication

A method, for a data receiver, of receiving data that can be represented by a modulation symbol comprising in-phase and quadrature components, wherein the method comprises:

• transmitting, to a data transmitter, a report that indicates a channel quality associated with a physical channel between the data transmitter and the data receiver;
• and
• selectively performing the following operations based on the indicated channel quality:
• receiving, from the data transmitter on a transmission frequency, at least two signals on respective at least two physical channels, wherein the at least two signals are jointly representative of the modulation symbol;
• down-converting the at least two signals from the transmission frequency to respective at least two baseband signals at a baseband frequency, wherein the at least two baseband signals are in phase with each other and are jointly representative of the modulation symbol;
• and
• combining the at least two baseband signals into the modulation symbol.

A data transmitter device arranged for transmitting data that can be represented by a modulation symbol comprising in-phase and quadrature components, wherein the data transmitter device comprises:

• at least one processor;
• and
• a memory storing instructions executable by the at least one processor, whereby the data transmitter device is operative to:
• receive, from the data receiver, a report that indicates a channel quality associated with a physical channel between the data transmitter device and the data receiver;
• selectively perform the following operations based on the indicated channel quality:
• split the modulation symbol into at least two baseband signals that are in phase with each other and that are jointly representative of the modulation symbol,
• up-convert the at least two baseband signals from a baseband frequency to a transmission frequency, and
• transmit the at least two up-converted signals on respective at least two physical channels.

A data receiver device arranged for receiving data that can be represented by a modulation symbol comprising in-phase and quadrature components, wherein the data receiver device comprises:

• at least one processor;
• and
• a memory storing instructions executable by the at least one processor, whereby the data receiver device is operative to:
• transmit, to the data transmitter, a report that indicates a channel quality associated with a physical channel between the data transmitter and the data receiver device;
• and
• selectively perform the following operations based on the indicated channel quality:
• receive, from the data transmitter on a transmission frequency, at least two signals on respective at least two physical channels, wherein the at least two signals are jointly representative of the modulation symbol;
• down-convert the at least two signals from the transmission frequency to respective at least two baseband signals at a baseband frequency, wherein the at least two baseband signals are in phase with each other and are jointly representative of the modulation symbol;
• and
• combine the at least two baseband signals into the modulation symbol.