Research On Achievable Scheme Of Interference Alignment Technology

With the development of communication technology,people have found a new problem when they enjoy the convenience brought by the increasing communication rate,th at is the increase of interference.In the face of the upcoming 5G new scene,the traditional interference processing technology can't meet the demand gradually,and the interference alignment technology proposed in recent years has been studied by many scholars because of its high degree of freedom and high scalability.By designing the precoding matrix,the interference alignment technique can compress the spatial dimension occupied by the interference signal while effectively suppressing the interference,thereby improving the degree of freedom of the system.In recent years,the research on interference alignment is mostly in the aspect of algorithm design and theoretical derivation,and the simulation verification is mostly numerical simulation,so the practical engineering problems are considered less.This paper focuses on the application of interference alignment in engineering.Firstly,most of the current research results assume that the transmitter has ideal channel state information,but the ideal channel state information is not available in practical systems.In response to this problem,the MAT space-time interference alignment algorithm is studied in this paper.This algorithm uses the delayed channel state information to perform interference alignment.In this paper,an improved scheme for the problem of excessive occupied time slots in the MAT algorithm is proposed to improve the achievability of the MAT algorithm.Secondly,in the future system,the number of asymmetric uplink and downlink information flows will increase rapidly,and the interference will become stronger and stronger.To solve this problem,this paper proposes an engineering achievable solution to solve the interference between uplink and downlink by using interference alignment technology.Thirdly,the research on interference alignment is mostly studied on algorithm design and theoretical derivation.To solve this problem,this paper designs a three-cell asymmetric uplink and downlnk system model and applies interference alignment to eliminate interference in the upliink and downlink channel and simulates the traditional scheme to observe the actual effect of interference alignment.