How to calculate "CRS spectral power density " of a 40W LTE Cell?

4G LTE
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Hello Experts.

Someone know how to calculate "CRS spectral power density " of a 40W LTE Cell?

And if there is diference in “spectral power density (W/Hz)” in SIMO and MIMO 2X2 cell with the same power?

BW 10 MHz, 40W both cells.