MIMO 2x2 versus 4x4

Hello dear Experts,

When changing MIMO, from using MIMO 2x2 to MIMO 4x4, what are the advantages and disvantages in the network?

Thanks for any comment in advance.

You can get the advantages of the larger coverage and higher throughput, at the cost of higher complexity and power consumption.

Please @Wendy, can you give more details about coverage différence?

In the same channel condition and maintaining the same date rage, the maximum coverage advantage can be double (2x cover distance) or more if take into account all potential diversity gain in PHY layer.

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Thanks you