Research Of Interference Alignment Technology In Wireless Multiusers’ Communication

MIMO technology can improve the channel capacity several times over without increasing spectrum resource and transmitting power, which becomes one of the key technology in wireless communication. There are many interference problem in MIMO system, such as the interference between antennas, the interference between users, the interference between base stations. Different interference management methods determine the different transmission rate. Conventionalinterference elimination approaches include treatinginterferenceasnoise, interferencedecoding and orthogonality. Recently, some scholar proposed the scheme of interference alignment, which can improve the channel capacity greatly through overlapping the interference space. So it becomes the hot research area in wireless communication field. The major research of this article is about the interference alignment technology in multi-user communication system. The tasks of study are as follows:Firstly, from the background of interference alignment and statue of research, this article analyses the significance of the study, and introduce the basic knowledge of interference alignment and MIMO. give a brief introductions about the interference alignment system model.Then, this part of designing the receiver and transmitter is a focal point of a full text. Analyze the linear Interference alignment, distributed Interference alignment(include minimum surplus algorithm and maximum SINR algorithm), blind Interference alignment in detail. Through building the simulation linkage, Analyze the performance of different method. Study the blind interference alignment structure, analyze the channel capacity. Through simulation, verify the performance of interference alignment and the conclusion above. Analyze the stability condition of interference alignment.Finally, study the combination of the Interference alignment technology and Alamouti encoding technology. Analyze the algorithm combined with Alamouti and Interference alignment equipped with 2 antennas. Propose the design about the transmitter and receiver with Alamouti Interference alignment equipped with 4 antennas. Compare with the original algorithm, the Alamouti Interference alignment can not only keep transmitting in high-speed, but also enhance the transmission reliability to reduce error probabilities. Draw conclusions about Interference alignment through simulation.