Asynchronous bidirectional communications in cell free networks

A transceiver device for minimizing a total transmit power in a bidirectional asynchronous cell free network where at least two transceivers, TRs, exchange their information using a number of amplify and forward, AF, based access points, APs, the total transmit power subject to quality of service, QoS constraints on data-rates of the TRs, the transceiver device comprising processing circuitry and memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the transceiver device to perform operations comprising:

• estimate channels between the at least two TRs and the AF-based APs;
• calculating a total power consumption for each channel tap;
• determine a single non-zero channel tap which results in a lowest total power consumption;
• based on the single non-zero channel tap determined:
• calculate beamforming matrices for the APs;
• calculate a total power transmission of each transceiver of the at least two transceivers;
• calculate precoding matrices at each transceiver of the at least two transceivers;
• and
• calculate post-channel equalizers at the at least two transceivers.