Efficient user Scheduling under Low Rate Feedback for Correlated MIMO Broadcast Channels
Efficient user Scheduling under Low Rate Feedback for Correlated MIMO Broadcast Channels
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DOI：
10.1109/icc.2008.688
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发表时间：
2008-05
期刊：
影响因子：
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通讯作者：
Wei Xu;Chunming Zhao;Z. Ding
中科院分区：
文献类型：
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作者：
Wei Xu;Chunming Zhao;Z. Ding
研究了空间相关信道下MIMO系统中用户信号的调度问题。通过最大化的上限和容量，我们提出了一个调度方案，只需要一个单一的标量反馈，从每个接收用户。为了进一步减少对用户信息反馈的需要，更好地探索空间相关信息，还开发了更有效的调度方法。该方法只需要每个用户提供1比特的指示信息，并根据MIMO信道相关信息的缓慢变化来选择用户。数值结果验证了我们所提出的方案的有效性。
This paper investigates the scheduling of user signals in MIMO systems with spatially correlated channels. By maximizing an upper bound of the sum capacity, we propose a scheduling scheme which requires only a single scalar feedback from each receiving user. To further reduce the need for user information feedback and better explore the spatial correlation information, a more efficient scheduling method is also developed. This new approach only requires a 1-bit indicator from each user and selects users according to the slowly varying MIMO channel correlation information. Numerical results verify the effectiveness of our proposed schemes.