volume | PIER Journals

2016-01-27

Design and Analysis of Compact 108 Element Multimode Antenna Array for Massive MIMO Base Station

Akshay Jain,

Mr. Akshay Jain

DEAL DRDO

India

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Sandeep Kumar Yadav

Dr. Sandeep Kumar Yadav

CoE in ICT

IIT Jodhpur

India

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Progress In Electromagnetics Research C, Vol. 61, 179-184, 2016

doi:10.2528/PIERC15110502 | Google Scholar

Abstract

In this paper, we report the design and evaluation of a compact 108-element base station antenna array for massive multi-input multi-output (MIMO) system using a 3-port multimode antenna as a unit element. Of these three ports, port 1 and port 2 have orthogonally polarized broadside radiation pattern with measured peak gain of 6.5 dBi and impedance bandwidth of 254 MHz (2.268 GHz-2.522 GHz) and 238 MHz (2.248 GHz-2.486 GHz), respectively, while port 3 has monopole-like radiation pattern having measured peak gain of 1.21 dBi and impedance bandwidth of 102 MHz (2.376 GHz-2.478 GHz). Mutual coupling among all the ports is kept as less than -14 dB. Design of 108 elements massive MIMO antenna array is evaluated as a base station antenna for multiuser urban street grid scenario in MIMO-OFDM downlink system, which is further modeled using Wireless World Initiative New Radio II (WINNER II) Channel models in MATLAB. Parameters like Singular value spread and Dirty Paper Coding (DPC) sum capacity was calculated and compared with i.i.d channel model. For 4 users case using same frequency and time resource, singular value spread and DPC sum capacity for presented antenna array converges to 7 dB and 11.6 bps/Hz at 10 dB SNR, respectively.

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Akshay Jain, and Sandeep Kumar Yadav, "Design and Analysis of Compact 108 Element Multimode Antenna Array for Massive MIMO Base Station," Progress In Electromagnetics Research C, Vol. 61, 179-184, 2016.
doi:10.2528/PIERC15110502

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