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Electronics 2018, 7(8), 144; https://doi.org/10.3390/electronics7080144

A Novel Multi-User Codebook Design for 5G in 3D-MIMO Heterogeneous Networks

1
Department of Industrial Engineering, University of Engineering & Technology, Peshawar 814 KPK, Pakistan
2
Department of Electrical Engineering, University of Engineering & Technology, Peshawar 814 KPK, Pakistan
3
Integrated Management Coastal Research and Telecommunications and Multimedia Applications (iTEAM) Institutes, Universitat Politècnica de València, 46022 Camino de Vera, Spain
*
Author to whom correspondence should be addressed.
Received: 7 July 2018 / Revised: 30 July 2018 / Accepted: 7 August 2018 / Published: 10 August 2018
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Abstract

The 2D precoding technology can only adjust the beam in a horizontal direction through data processing, which will cause serious problems for multiuser systems, especially at the edge of the base station it will cause serious inter-cell interference. To solve this problem, in the frequency-division duplex (FDD) 3D-MIMO Heterogeneous network system, the influence of feedback overhead on system performance under limited feedback mechanism is studied using random geometry. Based on the deployment of a uniform planar array (UPA) at the base station, a 3D-MIMO multiuser codebook design scheme based on horizontal transmission angle and the vertical down-tilt angle is proposed, and the codebook design scheme is simulated and analyzed. The results show that the feedback overhead and the micro base station density affect the system throughput and even affect the bit error rate (BER) of the 3D precoding scheme. Compared with the precoding scheme based on 2D and 3D discrete Fourier transform (DFT) codebooks, this scheme greatly reduces the system’s BER, improves the system’s throughput, and optimizes system performance. View Full-Text
Keywords: 5G; MMSE channel estimation; pilot; precoding; Rayleigh entropy 5G; MMSE channel estimation; pilot; precoding; Rayleigh entropy
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Arshad, M.; Khan, I.; Lloret, J.; Bosch, I. A Novel Multi-User Codebook Design for 5G in 3D-MIMO Heterogeneous Networks. Electronics 2018, 7, 144.

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