Abstract
A novel cross-layer call admission control policy is proposed for a general CDMA beamforming system. In contrast to previously proposed call admission control (CAC) policies which focus on large systems and specific receiver structures, in this paper we aim to design an optimal CAC policy in a more general CDMA beamforming system. The effects due to mutual coupling and multi-path scattering are also taken into account. Based on this more realistic signal propagation model, an optimal semi-Markov decision process (SMDP)-based CAC policy is proposed, which is then evaluated and compared with single antenna systems. Numerical examples demonstrate that compared with the case in single antenna systems, our proposed CAC policy for beamforming systems is capable of achieving a significant performance gain, while simultaneously guaranteeing quality-of-service (QoS) requirements.
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