A Novel Design of Hybrid Precoder in Multicell, Multiuser Heterogeneous Network

In this paper, the precoders capable of maximizing the weighted sum rate (WSR) for multicell scenarios under power budget constraint conditions per cell were considered based on the MIMO system performance. This rate is strongly affected by intracellular interference, so we recommend using coordinat...

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Bibliographic Details
Published inInternational journal of antennas and propagation Vol. 2022; pp. 1 - 9
Main Authors Pouryeganeh, Mohammad Reza, Fard, Azim, Tavakoli, Mohammad Bagher
Format Journal Article
LanguageEnglish
Published New York Hindawi 18.08.2022
Hindawi Limited
Subjects
Algorithms
Antennas
Beamforming
Design
Matched filters
Mathematical analysis
Maximization
Optimization
Optimization techniques
Random variables
Receivers & amplifiers
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Summary:In this paper, the precoders capable of maximizing the weighted sum rate (WSR) for multicell scenarios under power budget constraint conditions per cell were considered based on the MIMO system performance. This rate is strongly affected by intracellular interference, so we recommend using coordinated beam forming (CBF). If the number of user equipment provided per cell is small enough to the number of transmit antennas, simple linear beamformers, such as matched filter (MF), achieve higher performance rates. In general cases, two algorithms meet the best performance in terms of the total achievable rate; these are KG (Kim Giannakis) and WSMSE (Weighted Sum Minimum Squared Error) algorithms. In the KG method, the objective function of the sum rate is suggested to be divided into two functions, one function for the desired user rate and the other for the sum rate of the remaining users. In the WSMSE algorithm, maximizing the sum rate is solved by redefining it as the problem of minimizing the MSE (Mean Square Error) function. These functions are convex and nonconvex functions, respectively. In the proposed method, the WSMSEs were modified to reduce the complexity and calculations to provide optimal performance in beamforming.
ISSN:1687-5869
1687-5877
DOI:10.1155/2022/8378526