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Massive MIMO Antenna Array Design for Fifth Generation Telecommunication Application with the Aim of Increasing Data Transmission Rate

Ezzati, Vahid | 2024

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 57714 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Farzaneh, Forouhar; Fakharzadeh, Mohammad
  7. Abstract:
  8. In this research, the goal is to design a massive MIMO antenna array in the fifth generation of cellular communication to reduce the price of hardware and energy consumption, and increase the spectral efficiency of the system. One of the most important achievements of massive MIMO is channel hardening, which makes the channel more stable and reduces the need for channel measurements. It also simplifies the estimation methods and computational complexity in hardware and software and ultimately leads to an increase in spectral efficiency. In this research, fifth generation cellular communication systems with massive MIMO base station are investigated in terms of channel, array geometry and antenna element. It has been shown that the design of coupling between antennas, based on channel specifications, can improve the data rate and link error rate between the base station and users in certain conditions. Ray tracing model and 3GPP stochastic model has been used for channel hardening simulation to determine the effects of array geometry on channel hardening. In order to verify, the measurement results have been used for characteristics of the channel. To improve the effect of channel hardening, different array geometries have been investigated in massive MIMO and it has been shown which types of geometries provide the greatest improvement in channel hardening. In order to compare array geometries more easily, an analytical formula has been extracted and with the help of it the array spread parameter has been proposed and calculated. Also, with the help of genetic algorithm, the dimensions of the array and the optimal number of antennas have been optimized to achieve a degree of channel hardening, and the channel hardening limit has been calculated for a certain area of the array. The channel hardening has been investigated for different physical antennas and it has been determined that the higher gain of the antennas leads to the reduction of the channel hardening
  9. Keywords:
  10. Massive Multiple-Input Multiple-Output Systems ; 5th Generation Cellular Network ; Array Geometry ; Array Spread ; Channel Hardening ; Array Layout ; Antenna Coupling ; Information Transfer

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