Optimal power allocation of a sensor node under different rate constraints
Type
Conference PaperKAUST Department
Applied Mathematics and Computational Science ProgramCommunication Theory Lab
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2012-06Permanent link to this record
http://hdl.handle.net/10754/564571
Metadata
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The optimal transmit power of a sensor node while satisfying different rate constraints is derived. First, an optimization problem with an instantaneous transmission rate constraint is addressed. Next, the optimal power is analyzed, but now with an average transmission rate constraint. The optimal solution for a class of fading channels, in terms of system parameters, is presented and a suboptimal solution is also proposed for an easier, yet efficient, implementation. Insightful asymptotical analysis for both schemes, considering a Rayleigh fading channel, are shown. Finally, the optimal power allocation for a sensor node in a cognitive radio environment is analyzed where an optimum solution for a class of fading channels is again derived. In all cases, numerical results are provided for either Rayleigh or Nakagami-m fading channels. © 2012 IEEE.Conference/Event name
2012 IEEE International Conference on Communications, ICC 2012ISBN
9781457720529ae974a485f413a2113503eed53cd6c53
10.1109/ICC.2012.6363758