Design And Implementation Of The Transmitter For Uplink Massive Mimo Systems

The MIMO technology,which consist in multiple antennas at both the transmitter and multiple antennas at the receiver,are currently being the way most efficient to improve the spectral efficiency and increase the bi nary rateas well,MIMO are included in the latest mobile communications standards.However,MIMO also presents some difficulties,such as the complexity in the hard ware,the calculation of precedes or the estimation of a channel in the receiver.This work consists of study cases of the performance of a massive MIMO system in the uplink on a transmitter with 40 antennas for three different velocities: one for a pedestrian velocity in which the user is walking,the second one for car velocity when driving in a city,and car velocity when driving along a Highwa y.The transmitter that will be studied in this work consists of a jacket with 40 antennas which are placed using the textile technology on its back.5 antennas horizont ally distributed and 8 antennas vertically distributed.The practical work started with the tools used to do the simulation then different simulations have been made for different MIMO system configurations.In this work,our main MIMO system configuration is MIMO 40 x 40 system as well as another MIMO system configurations have been also simulated such as MIMO 40 x 64,40 x 8,40 x 4 and 40 x 1.The objective of our work is to check how the performance of MIMO system is degraded with those intended MIMO configurations during the motion of the transmit ter which is in our case(the jacket with antennas fixed on it)and how and to what ext ent the capacity is affected by the number of antennas in the receiver(base station).T herefore,as a result,we will have the ability of finding a suitable frame structure na mely;frame duration/length,as well as the duration of the pilot sequence(used to est imate the channel in the receiver).Consequently,coping with the worst case and impr oving the binary rate and spectral efficiency.Our practical work contributes to study the cases of MIMO system transmitter and its performances in the uplink for the three different sp eeds.Then it provides solution that takes into account the worst scenario which is speed in highway.In the conclusion of this work,MIMO has been proved to be a very efficient way to increase capacity in a fast manner.Through all the simulations,it has been possible to appreciate that capacity is affected so much by the number of antennas in the receiver.Finally,all the simulations have brought to our work is that the frameduration that would have to be used in a real scenario would be of 1000 slots andCDIT is the best case in our scenario such that it provid es better and higher capacitiesof the simulated channel or for the frame chosen in our project.