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Shifting the MIMO Paradigm

机译:转变MIMO范式

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摘要

Multi-user MIMO (MU-MIMO) networks reveal the unique opportunities arising from a joint optimization of antenna combining techniques with resource allocation protocols. Furthermore, it brings robustness with respect to multipath richness, allowing for compact antenna spacing at the BS and, crucially, yielding the diversity and multiplexing gains without the need for multiple antenna user terminals. To realize these gains, however, the BS should be informed with the user's channel coefficients, which may limit practical application to TDD or low-mobility settings. To circumvent this problem and reduce feedback load, combining MU-MIMO with opportunistic scheduling seems a promising direction. The success for this type of scheduler is strongly traffic and QoS-dependent, however.
机译:多用户MIMO(MU-MIMO)网络揭示了天线技术与资源分配协议的联合优化带来的独特机会。此外,它带来了关于多径丰富性的鲁棒性,从而允许在BS处实现紧凑的天线间隔,并且至关重要的是,无需多个天线用户终端即可产生分集和复用增益。然而,为了实现这些增益,应该向BS通知用户的信道系数,这可能将实际应用限制为TDD或低移动性设置。为了避免这个问题并减少反馈负载,将MU-MIMO与机会调度相结合似乎是一个有前途的方向。但是,这种类型的调度程序的成功很大程度上取决于流量和QoS。

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