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This paper presents a novel fair scheme for resource sharing between nodes in OFDMA mesh networks. The problem is to maximize the overall system rate, under each user's maximal power and minimum rate constraints. To solve the underlying problem, we propose an approach that combines the merits of the well known Lagrange dual framework and the Lambert-W function. By using the Lambert-W function, resource...
Adaptive resource allocation has been shown to provide performance gain for OFDMA wireless mesh networks (WMNs) with full channel state information (CSI) at mesh router (MR) and mesh clients (MCs). However, full CSI at MR is rarely possible due to limited feedback resource and feedback delay. In this paper, we present more practical resource allocation strategies for OFDMA WMNs where the MR has only...
In some fading environments, there may not be a feedback link sufficiently fast to convey the full channel state information (CSI) to the transmitter. This paper considers resource allocation strategies for downlink multiuser mobile WiMAX systems, where the base station knows only the channel distribution information (CDI), but has no knowledge of the instantaneous channel realization. The base station...
Adaptive resource allocation algorithms based on perfect channel state information at the transmitter (CSIT) improve the performance of OFDMA systems. However, perfect CSIT is rarely possible due to channel estimation errors and channel feedback delay. In this paper, we consider practical subchannel assignment and power allocation strategies for downlink multiuser OFDMA systems, where the base station...
Adaptive resource allocation has been shown to provide substantial performance gain in OFDMA based wireless systems when perfect channel state information (CSI) is available at the transmitter. However, perfect CSI at the transmitter (CSIT) is rarely possible due to channel estimation errors and channel feedback delay. In this paper, we consider practical resource allocation strategies for downlink...
Orthogonal frequency division multiplexing with code division multiplexing (OFDM-CDM) is one of the combined schemes of OFDM and CDMA techniques. The CDM component enables additional diversity in frequency selective fading channels. This paper proposes an optimal power allocation via proposal-fair strategy for the OFDM-CDM-based systems. A zero-forcing beamformer is used at the mobile unit and the...
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