scholarly journals Implementation of Multiple-Input Multiple-Output Dynamic Matrix Control Algorithm for Fast Processes Using Field Programmable Gate Array

2018 ◽  
Vol 51 (6) ◽  
pp. 324-329 ◽  
Author(s):  
Andrzej Wojtulewicz ◽  
Maciej Ławryńczuk
Author(s):  
Konstanty Bialkowski ◽  
Adam Postula ◽  
Amin Abbosh ◽  
Marek Bialkowski

This chapter introduces the concept of Multiple Input Multiple Output (MIMO) wireless communication system and the necessity to use a testbed to evaluate its performance. A comprehensive review of different types of testbeds available in the literature is presented. Next, the design and development of a 2×2 MIMO testbed which uses in-house built antennas, commercially available RF chips for an RF front end and a Field Programmable Gate Array (FPGA) for based signal processing is described. The operation of the developed testbed is verified using a Channel Emulator. The testing is done for the case of a simple Alamouti QPSK based encoding and decoding scheme of baseband signals.


2020 ◽  
Author(s):  
Alisson M. F. Pereira ◽  
Wellington T. Martins ◽  
Vinícius S. Moreira ◽  
Márcio F. Braga ◽  
Thiago A. M. Euzébio

A iminente necessidade de aplicar técnicas de controle multivariável em processos de espessamento contínuo se dá devido ao fato de encontrar-se inúmeras situações indesejadas em plantas de tratamento de minério. No presente trabalho são apresentados os resultados de um Controle por Matriz Dinâmica (DMC, do inglês Dynamic Matrix Control) Múltiplas Entradas Múltiplas Saídas (MIMO, do inglês Multiple Input Multiple Output) em comparação com um controlador Proporcional-Integral (PI), em que as variáveis controladas são a densidade na descarga e a altura da interface, enquanto que as variáveis manipuladas são a vazão na descarga e a dosagem de floculante. O modelo não linear é validado com dados reais de um espessador de minério de ferro encontrado em uma usina de beneficiamentomineral da Vale S.A. Utiliza-se o índice da Integral do Erro Absoluto (IAE) para avaliar o desempenho dos controladores, sendo possível observar um melhor desempenho para o controlador DMC.


2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Yoshio Karasawa ◽  
Katsuhiro Nakada ◽  
Guijiang Sun ◽  
Rikako Kotani

We present four new developments for a multiple-input multiple-output (MIMO) over-the-air measurement system based on our previous studies. The first two developments relate to the channel model for multipath environment generation. One is a further simplification of the circuit configuration without performance degradation by reducing the number of delay generation units, which dominate the performance limit when implementing the circuit on a field-programmable gate array (FPGA). The other is to realize spatial correlation characteristics among the input ports on the transmission side, whereas the previously proposed channel model did not consider this correlation. The third development involves the details of implementing the MIMO fading emulator on an FPGA as a two-stage scheme. The fourth is the demonstration of application examples of the developed system.


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