Estimação de Canal em Sistemas Sem Células Sujeitos ao Descasamento RF

In recent years, performance studies have been carried out and solutions have been proposed for typical specificities of cell-free communications systems, where there are no radio base stations responsible for a region, but all access points serve all users who they can communicate. In this work, we intend to present the performance analysis of this type of system in the uplink and downlink, considering the effect of pilot interference. The analyzes are based on the average transmission rates. Finally, the mean squared error based channel estimation equation, estimated channel variance and estimation error variance in the presence of radiofrequency mismatch were obtained for a cellfree system.