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Rate of Channel Hardening of Antenna Selection Diversity Schemes and Its Implication on Scheduling

机译:天线选择分集方案的信道硬化速率及其调度

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摘要

For a multiple-antenna system, we find a simple and accurate expression for the asymptotic distribution of the antenna selection gain when the transmitter selects the transmit antenna with the strongest channel. We use this to estimate the underlying channel capacity distributions and obtain the approximate ergodic capacity. This estimate is compared with upper and lower bounds. This analysis demonstrates that unlike multiple-input/multiple-output (MIMO) systems, the channel for antenna selection systems hardens at a slower rate, and thus a significant multiuser scheduling gain can exist-Theta (1/logm) for channel selection as opposed to Theta (1/radicm) for MIMO, where m is the number of transmit antennas.
机译:对于多天线系统,当发射器选择信道最强的发射天线时,我们找到了一个简单准确的表达式,用于表示天线选择增益的渐近分布。我们用它来估计潜在的信道容量分布并获得近似遍历容量。将该估计值与上下限进行比较。该分析表明,与多输入/多输出(MIMO)系统不同,天线选择系统的信道以较慢的速率硬化,因此可以存在显着的多用户调度增益-与信道选择相对的Theta(1 / logm)到MIMO的Theta(1 / radicm),其中m是发射天线的数量。

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