Spatial Correlation Models of Large-Scale Antenna Topologies Using Maximum Power of Offset Distribution and its Application
| Autor: | Kwadwo Ntiamoah-Sarpong, Yongjun Huang, Kwame Oteng Gyasi, Parfait I. Tebe, Affum Emmanuel Ampoma, Guangjun Wen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Spatial correlation
Offset (computer science) General Computer Science Maximum power principle Computer science Monte Carlo method MIMO 050801 communication & media studies 02 engineering and technology Data_CODINGANDINFORMATIONTHEORY Topology small cell network (SCN) maximum power of arrival (MPA) Base station 0508 media and communications spatial correlation (SC) Telecommunications link 0202 electrical engineering electronic engineering information engineering cluster model massive MIMO General Materials Science Antenna arrays Computer Science::Information Theory 05 social sciences General Engineering 020206 networking & telecommunications lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 Communication channel |
| Zdroj: | IEEE Access, Vol 6, Pp 36295-36304 (2018) |
| ISSN: | 2169-3536 |
| Popis: | In this paper, we present an approximate expression for spatial correlation of cylindrical and uniform rectangular arrays regarding the maximum power of offset distributions useful for evaluating geometry-based stochastic channel models. The underlying concept of the proposed spatial correlation expression is that the maximum power of arrival varies relative to the offset distribution in the azimuth and zenith domains. Verification is accomplished with the help of computer simulation, where perfect agreement between theoretical and Monte Carlo simulation results is found. Toward the implementation of large-scale MIMO transmitters in constrained physical spaces to accomplish the demands for the next generation of wireless systems, we examine the effect of the proposed spatial correlation model on the downlink (DL) performance of massive multi-input-multi-output (MIMO) system. Results illustrate that the DL capacity does not demonstrate any sensitivity to the effect of correlation by increasing the number of elements in a realistic massive MIMO channel. Surprisingly, while the spatial correlation restricts the DL capacity at a reduced number of transmit antennas, the restriction becomes insignificant as the number of transmit antennas increases. This supports existing developments that user channels decorrelate when the number of antennas at the base station increases. Finally, experimental results show that separation of more than half wavelength is inadequate to decorrelate the antenna elements. |
| Databáze: | OpenAIRE |
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