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Exact post-scheduling SINR analysis for orthogonal random beamforming systems

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2 Author(s)
Chanhong Kim ; School of Electrical Engineering, Seoul National University, 599 Kwanak-Ro, Kwanak-Gu, Seoul 151-744, Korea ; Jungwoo Lee

Derived are the exact cumulative distribution functions (CDFs) of each user's feedback signal-to-interference-plus-noise ratio (SINR), and the post-scheduling SINR in orthogonal random beamforming systems with M transmit antennas and K single-antenna users considering both user feedback and scheduling. A key contribution is to derive the exact CDF of the post-scheduling SINR by direct integration, and it is verified by Monte-Carlo simulations. It is also shown that the existing approximate CDF is different from the exact distribution for SINR smaller than 0 dB.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 5 )