In this paper we study the downlink spectral efficiency of a wireless network using orthogonal frequency division multiple access (OFDMA), multiple input multiple output (MIMO) antenna systems and opportunistic scheduling (OS) techniques. The main purpose of the study is to understand how these techniques interact and influence the spectral efficiency of the network for different antenna configurations and scheduling policies given the coherence bandwidth of the channel and mobile speed. We will use the point-to-point link Shannon outage capacity as the underlying metric for evaluating the overall throughput of the network. The results illustrate the relationships between the different techniques.
['Oghenekome Oteri', 'Nicolae Chiurtu', 'Frederick K. H. Lee', 'Mohamad Charafeddine', 'Arogyaswami Paulraj']
NETp1-13: Studies in Downlink Spectral Efficiency of OFDMA Networks with MIMO and Opportunistic Scheduling