Fundamentals of wireless communication
Fundamentals of wireless communication
Adaptive radio resource allocation in OFDMA systems: a survey of the state-of-the-art approaches
Wireless Communications & Mobile Computing - Next Generation Wireless Communications and Mobile Computing-Networking Technologies
Queueing analysis for the OFDMA downlink: throughput regions, delay and exponential backlog bounds
IEEE Transactions on Wireless Communications
Effective capacity of superposition coding based mobile multicast in wireless networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Computationally efficient bandwidth allocation and power control for OFDMA
IEEE Transactions on Wireless Communications
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
Queue-balancing resource allocation for rate-stable OFDMA systems
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
Cross-Layer Design Using Superposition Coding Scheme for Multiuser OFDM Systems
Wireless Personal Communications: An International Journal
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In this paper, we propose to apply a simple superposition coding strategy for downlink of OFDMA systems. The novelty of this paper consists on allowing at most two users to share the same subchannel. The main idea is to consider the subchannels allocated to the users with the weakest link, and allow these subchannels to be shared by some potential users who can transmit some number of bits with only a small amount of power. To decrease the overhead of the proposed OFDMA system, we restrict to use a predetermined superposition encoding|decoding scheme. We address the problem of resource allocation, which consists on finding the optimal subchannel assignment in the OFDMA system. A low complexity algorithm, denoted Share Specific Subcarrier Allocation (SSSA) is then proposed. It offers a fairness allocation among users. This can be done by taking into account all user's buffer states information. Simulation results confirm that the proposed technique outperforms the classical algorithms in terms of total throughput and dropping probability.