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Next, replace the formulas shown in Equations 3 to 5 with the previous formulas.
Equations 1 and 2 can then be rewritten as shown in Equations 6 and 7.
By transforming the expression in this way, you can display multiple access points as if they were one large access point.
In other words, you can replace cooperative MIMO with a regular MU-MIMO-like expression.
Therefore, the inter-user interference and self-interference present in Equations 6 and 7 can be eliminated by applying the usual MU-MIMO interference elimination methods such as block diagonalization.
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