Abstract
This work proposes a suboptimal multi-user scheduling scheme for Gaussian broadcast channels which improves upon the classical single user selection, while considerably reducing complexity as compared to the optimal superposition coding with successful interference cancellation. The proposed scheme combines the two users with the maximum weighted instantaneous rate using superposition coding. The instantaneous rate and power allocation are derived in closed-form, while the long term rate of each user is derived in integral form for all channel distributions. Numerical results are then provided to characterize the prospected gains of the proposed scheme.
Original language | English |
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Article number | 6880786 |
Pages (from-to) | 136-140 |
Number of pages | 5 |
Journal | IEEE Signal Processing Letters |
Volume | 22 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2015 |
Externally published | Yes |
Keywords
- Block-fading
- broadcast channels
- multi-user diversity
- resource allocation
- superposition coding