Method and apparatus for low complexity design of distributed high-rank mimo transmission in mobile communications

A method, comprising:

• receiving, by a processor of an apparatus, CSI from a UE, wherein the CSI includes a first precoding information and a second precoding information;
• generating, by the processor, a first precoded data signal and a second precoded data signal according to the CSI;
• and
• transmitting, by the processor, the first precoded data signal and the second precoded data signal to the UE on the same time-frequency resources.

An apparatus, comprising:

• a transceiver which, during operation, wirelessly communicates with a network node;
• and
• a processor communicatively coupled to the transceiver such that, during operation, the processor performs operations comprising:
• generating first precoding information implying a first precoding matrix and second precoding information implying a second precoding matrix according to a first channel response between the network node and a first group of antennas of the apparatus, a second channel response between the network node and a second group of antennas of the apparatus, and an assumption that a first signal precoded by the first precoding matrix and a second signal precoded by the second precoding matrix are transmitted from the network node on the same time-frequency resources, wherein the first signal is decoded based on first RF signals received by the first group of antennas, and the second signal is decoded based on second RF signals received by the second group of antennas;
• generating CSI including the first precoding information and the second precoding information;
• and
• receiving, via the transceiver, the CSI to the network node.