Selective interference alignment and neutralization in coordinated multipoint using multiuser MIMO

摘要

In wireless communication, the concept of coordinated multipoint (CoMP)transmission is more attractive, and it transpired the notion based on interferencemanagement techniques. Interference alignment (IA) and interferenceneutralization (IN) methods can substantially align and neutralize the interferencesignals. The existing work in the CoMP transmission using multiusermulti-input and multi-output (MU-MIMO) had long-held problems such asspecific limit of intercell (ICI) and cochannel interference (CCI) cancelationthat contain low performance in cell-edge users. The proposed framework ofthe transmission signal in selective interference alignment and neutralization(SIAN) CoMP MU-MIMO system transmits multiple data streams in multipathby using downlink coordination between base stations and receiver side. Thiswork contributes the individual perspectives to implement the IA and IN toalign and cancel the interfered signals at the receiver side. Once the perspectivesmentioned above are executed, zero-forcing (ZF) and rechanneling filterare applied on the receiver side to eliminate residual ICI. In addition, spectralefficiency significantly improves the achievable data rate and enhances theperformance of cell-edge users and reduces the CCI at the receiver side. Furthermore,the antenna configuration signals are decoded to get the exact versionof interference-free signals with null path loss of signal transmission. Theeffectiveness of the proposed framework analyzes and verifies the numericalevaluation of the achievable degree of freedom. Finally, the simulation demonstratesthe comparison of the proposed CoMP scheme with MIMO ZF andnon-CoMP schemes, which significantly improve the performance of spectralefficiency for cell-edge users.