Explaining MIMO, Number of layers and Transmission Modes

Hello All.

Does someone have a good material explaining MIMO, Number of layers and Transmission Modes, specially TM3 and TM4?

Admin note: this post was updated with image below.

Explaining MIMO, Number of layers and Transmission Modes

Here is a good one @rafavcc:

Multiple input multiple output (MIMO)
technology is an integral part of 3GPP E-UTRA long term evolution (LTE). As part of MIMO, beamforming is also used in LTE.
This white paper discusses the basics of beamforming and explains the ten downlink and two uplink MIMO transmission modes in LTE Release 12.

LTE Transmission Modes and Beamforming - White Paper

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Amazing. Thank you so much!