In this paper, the problem of multi-user sub-carrier allocation by metric of channel gain in an
OFDMA system is formulated as an assignment problem in order to investigate an optimal …

A new sub-optimal subcarrier allocation algorithm named" ratio-based selection"(RBS) is
proposed. In multiuser OFDM system, almost all present sub-optimal allocation algorithms …

Subcarrier-and-bit allocation (SBA) has been exten-sively investigated in the literature to
improve spectral efficiency of multiuser OFDM systems. However, in previous studies, only …

In this paper, the rate adaptive optimization (RA) problem, which maximizes the sum of user
data rates subject to total power constraint and individual guaranteed rates, is considered …

In this paper we propose a novel dynamic subcarrier assignment algorithm for the downlink
of an OFDMA system. In conventional schemes, subcarriers are assigned to the active users …

In this paper we describe an adaptive method for maximizing the sum rate in the uplink of a
multi-user multi-carrier system. Based on the optimum power allocation, which is computed …

In this paper we propose a computationally efficient subcarrier allocation algorithm for a
multiuser OFDM system suited for downlink and uplink transmission. The algorithm …

This paper investigates the problem of dynamic multiuser subchannel allocation in the
downlink of OFDM systems. The assumptions are that the channel model is quasi-static and …

In this paper, we design and investigate two subcarrier-allocation algorithms for downlink
orthogonal frequency-division multiple-access (OFDMA) systems. One is designed to avoid …

A blockwise adaptive subcarrier allocation algorithm is presented in this paper which is for
the downlink of the multiuser OFDM system. Assuming perfect knowledge of the channel …