Massive MIMO Extensions to the COST 2100 Channel Model: Modeling and Validation

Research output: Contribution to journalArticle

Abstract

To enable realistic studies of massive multiple-input multiple-output systems, the COST 2100 channel model is extended based on measurements. First, the concept of a base station-side visibility region (BS-VR) is proposed to model the appearance and disappearance of clusters when using a physically-large array. We find that BS-VR lifetimes are exponentially distributed, and that the number of BS-VRs is Poisson distributed with mean proportional to the sum of the array length and the mean lifetime. Simulations suggest that under certain conditions longer lifetimes can help decorrelating closely-located users. Second, the concept of a multipath component visibility region (MPC-VR) is proposed to model birth-death processes of individual MPCs at the mobile station side. We find that both MPC lifetimes and MPC-VR radii are lognormally distributed. Simulations suggest that unless MPC-VRs are applied the channel condition number is overestimated. Key statistical properties of the proposed extensions, e.g., autocorrelation functions, maximum likelihood estimators, and Cramer-Rao bounds, are derived and analyzed.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Communication Systems

Keywords

  • birth-death process, channel measurements, channel model, closely-located users, large arrays, Massive MIMO, non-stationarity
Original languageEnglish
Article number8866736
Pages (from-to)380-394
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume19
Issue number1
Publication statusPublished - 2020
Publication categoryResearch
Peer-reviewedYes