Analysis of a MIMO OFDMA Heterogeneous Feedback System Employing Joint Scheduling and Spatial Diversity in Nakagami Fading Channels
The authors present a unified analytical framework to jointly examine spatial, spectral, and multiuser diversity in a general multiuser MIMO OFDMA system. Spectral diversity originates from frequency domain opportunistic scheduling enabled by the OFDMA technique, and is influenced by partial feedback design. They propose a heterogeneous partial feedback design method which adapts users' feedback resources to their frequency domain channel statistics. They investigate this adaptive feedback design by employing the best-M partial feedback strategy, and derive closed form expressions for the average spectral efficiency and bit error rate with different spatial diversity schemes under the generalized Nakagami-m fading channels.