Delay-limited capacity of fading multiple access and broadcast channels in the low power regime
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/621311
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AbstractWe study delay-limited (also called zero-outage) capacity region of the fading multi-access channel (MAC) with Gaussian noise and perfect channel state information (CSI) at the receiver and at the transmitters (CSI-TR), in the low-power regime. We show that for fading channels where the MAC capacity region is strictly positive, it has a multidimensional rectangle structure and thus is simply characterized by single user capacity points. More specifically, we show that at low power, the boundary surface of the capacity region shrinks to a single point corresponding to the sum-rate maximizer and that the coordinates of this point coincide with single user capacity bounds. Using the duality of the Gaussian MAC and broadcast channels (BC), we show that time-sharing (or time division multiple access (TDMA)) is asymptotically optimal. © 2015 IEEE.
CitationRezki Z, Alouini M-S (2015) Delay-limited capacity of fading multiple access and broadcast channels in the low power regime. 2015 IEEE International Conference on Communications (ICC). Available: http://dx.doi.org/10.1109/ICC.2015.7248953.
Conference/Event nameIEEE International Conference on Communications, ICC 2015