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arXiv 1908.02982eess.SP
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关于天线阵的带外辐射

On Antenna Array Out-of-Band Emissions

Lauri Anttila, Alberto Brihuega, Mikko Valkama

摘要:

我们证实和扩展最近的研究在天线阵列发射机的带外发射的行为。具体而言,与多用户预编码,我们表明,发射总是波束成形的方向上的预期接收器,相反,在最近的文献中的一些索赔。此外,虽然也存在其他虚假的方向,我们表明,在预期的接收器的方向上的发射总是最强的。我们还表明,具有相互不同的非线性相位特性的功率放大器将降低不需要的发射的波束形成增益,随着相位偏差的增加,增益接近非相干组合极限。

英文摘要:

We substantiate and extend recent research on the behavior of the out-of-band emissions in antenna array transmitters. Specifically, with multi-user precoding, we show that the emissions are always beamformed in the directions of the intended receivers, contrary to some claims in the recent literature. Moreover, while also other spurious directions exist, we show that the emissions are always strongest in the directions of the intended receivers. We also show that power amplifiers with mutually different nonlinear phase characteristics will reduce the beamforming gain of the unwanted emissions, with the gain approaching the noncoherent combining limit as the phase deviations are increased.

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