文档介绍：A Low Complexity Algorithm for Proportional
Resource Allocation in OFDMA Systems
Ianonstraints.
root-finding method, the proposed method waives the restriction It was shown in [6] that in order to maximize the total capacity,
of high subchannel SNR, has significantly lower complexity, and each subcarrier should be allocated to the user with the best
in simulation, yields higher user data rates.
gain on it, and the power should be allocated using the water-
filling algorithm across the subcarriers. However, no fairness
I. INTRODUCTION
among the users was considered in [6]. This problem was
OFDMA, also referred to as Multiuser-OFDM [1], is being partially addressed in [7] by ensuring that each user would
considered as a modulation and multiple access method for 4th be able to transmit at a minimum rate, and also in [8] by
generation wireless networks [2]. OFDMA is an extension of incorporating a notion of fairness in the resource allocation
Orthogonal Frequency Division Multiplexing (OFDM), which through maximizing the minimum user’s data rate. In [9], the
is currently the modulation of choice for high speed data fairness was extended to incorporate varying