Title :
Optimal Resource Allocation for Parallel Gaussian Broadcast Channels: Minimum Rate Constraints and Sum Power Minimization
Author :
Wunder, Gerhard ; Michel, Thomas
Author_Institution :
German-Sino Mobile Commun. Lab., Fraunhofer Inst. for Telecommun., Berlin
Abstract :
A system consisting of K parallel Gaussian broadcast channels over which a transmitter communicates with M receivers is considered. Assuming perfect channel state information, we study the problem of maximizing a weighted sum of rates under a sum power constraint with additional receiver-specific rate constraints. This problem formulation occurs frequently, e.g., in the context of scheduling for cellular downlink systems. Two algorithms are proposed which of one is based on a modified water-filling procedure. This algorithm is also suited to solve the minimum sum power problem.
Keywords :
Gaussian channels; broadcast channels; minimisation; resource allocation; wireless channels; channel state information; minimum rate constraints; optimal resource allocation; parallel Gaussian broadcast channels; receiver-specific rate constraints; sum power minimization; water-filling procedure; Broadcasting; Capacity planning; Channel state information; Context; Fading; Mobile communication; OFDM; Resource management; Signal processing algorithms; Transmitters; Broadcast channel; minimum rates; orthogonal frequency division multiplexing (OFDM); power control; superposition coding; water-filling;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2007.909137
