Rate and power allocation for multiuser OFDM: An effective heuristic verified by branch-and-bound

被引：32

作者：

Feiten, Anke ^{[1
]}

Mathar, Rudolf ^{[1
]}

Reyer, Michael ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Informat Technol, D-52056 Aachen, Germany

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2008年 / 7卷 / 01期

关键词：

multiuser channels; generalized water-filling; directional derivatives;

D O I：

10.1109/TWC.2008.060559

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The present correspondence deals with the rate and power allocation problem in multiuser orthogonal frequency division multiple (OFDM) access systems. We first derive the solution of the single user OFDM power allocation problem explicitly for a class of general rate-power functions by means of directional derivatives. This solution is employed for both designing a new heuristic and obtaining bounds in a branch-and-bound algorithm for allocating power to subcarriers. The branch-and-bound algorithm is used for performance evaluation of our new and two known power allocation heuristics by computing the exact optimum, given the number of allocated subcarriers per user.

引用

页码：60 / 64

页数：5

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