Mimo transceiver array for multi-band millimeter-wave 5g communication

A radio frequency (RF) frontend circuit comprising:

• a plurality of single-channel transceivers, each single-channel transceiver including a receive chain and a transmit chain, both the receive and transmit chains to receive a common local oscillator signal;
• a plurality of analog to digital converters (ADCs), wherein each of the plurality of ADCs is coupled to one of the plurality of single-channel transceivers;
• a plurality of digital to analog converters (DACs);
• wherein each of the plurality of DACs is coupled to one of the plurality of single-channel transceivers;
• and
• a digital signal processing (DSP) unit coupled to the ADCs and the DACs, wherein the DSP unit is configured to generate a first plurality of digital data streams simultaneously and each of the first plurality of digital data streams is converted by a respective one of the DACs into an analog data stream to be transmitted to a remote device by a respective one of the single-channel transceiver.