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Statistical Analysis of Downlink Zero-Forcing Beamforming

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Document pages: 5 pages

Abstract: We analyze the mean and the variance of the useful signal and interferencepowers in a multi-cell network using zero-forcing beamforming (ZF-BF) with twobeamformer normalization approaches. While the mean has been the main focus inearlier studies on ZF-BF, analysis of the variance has not been tackled. Ouranalysis provides a complete statistical study, sheds light on the importanceof the variance by deriving closed-form expressions for the signals twomoments, and provides a practical use for these expressions; we use the gammaor lognormal distribution for the interference power to analytically calculatethe outage.

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