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Performance Analysis of Optimum Zero-Forcing Beamforming with Greedy User Selection

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2 Author(s)
Ozyurt, S. ; Electr. Eng. Dept., Univ. of Texas at Dallas, Richardson, TX, USA ; Torlak, M.

In this letter, an exact performance analysis is presented on the sum rate of zero-forcing beamforming with a greedy user selection algorithm in a downlink system. Adopting water-filling power allocation, we derive a compact form for the joint probability density function of the scheduled users' squared subchannel gains when a transmitter with multiple antennas sends information to at most two scheduled users with each having a single antenna. The analysis is verified by numerical results.

Published in:

Communications Letters, IEEE  (Volume:16 ,  Issue: 4 )

Date of Publication:

April 2012

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