Zero-forcing precoding: Difference between revisions

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==Mathematical description==
In a multiple antenna downlink system which comprises an <math>N_t</math> transmit antenna access point and <math>K</math> single receive antenna users, such that <math>K \leq N_t</math>, the received signal of user <math>k</math> is described as
 
:<math>y_k = \mathbf{h}_k^T \mathbf{x} + n_k, \quad k=1,2, \ldots, K</math>