Rate and Power Allocation for Multiuser OFDM: An Effective Heuristic Verified by Branch-and-Bound


A. Feiten, R. Mathar, M. Reyer,


        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.

BibTEX Reference Entry 

	author = {Anke Feiten and Rudolf Mathar and Michael Reyer},
	title = "Rate and Power Allocation for Multiuser {OFDM}: An Effective Heuristic Verified by Branch-and-Bound",
	pages = "60-64 ",
	journal = "{IEEE} Transactions on Wireless Communications",
	volume = "7",
	number = "1",
	year = 2008,
	hsb = RWTH-CONV-223181,


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