Research On COMP-JP Technology

With the development in the mobile communications process, ITU proposed IMT systemperformance indicators proposed.3GPP proposed LTE-Advanced technical.. As the moreserious inter-cell interference, at present, interference coordination techniques can not solvethe cell edge users using low frequency of this problem. so people let the introduction ofmulti-point transmission and reception coordination in the LTE-Advanced. This technologyhas been to solve this problem. Coordinated multi-point transmission and receptiontechnologies through multiple inter-cell coordination or joint operation of transmission. Forthe adjacent cell interference can be reduced significantly and can improve the quality of thereceived signal receiver users. This technology can dramatically and effectively improve thesystem capacity and edge user spectral efficiency. This paper is mainly for the jointprocessing in the Comp technologies, with this technology as basis. Simulate the system-levelsimulation. We study this Comp program and its performance evaluation and validation. Thispaper includes the following aspects:1. In this paper we design and build a system simulation platform Comp JP, according tothe3GPP standard conference proposals and system simulation methods. These includemulti-residential space channel modeling and collaborative community of users and setco-determination, precoding, interference calculations and terminal receiver modules. Inthis simulation platform we verify single-user JP and multiple-users JP and theirperformance.2. In the ideal base to understand the case of channel, this paper studies of three pre-codingscheme, they are SVD, GMD and UCD value decomposition, this paper also deducedthis encoding. make the simulation three kinds of pre-coding under the different signal tonoise ratio and error rate. block diagonalization can significantly reduce the interferenceand its calculate is simple. Send and receive joint precoding method calculate theprecoding matrix and precoding matrix and receiver equalization with the iterative. Though diagonal block in the program can not solve the case, it can still achievesignificant BER performance and can adapt to higher channel correlation.3. Under the base station can be fully aware of the channel state information conditions,this paper preliminary make the simulation platform and algorithms based oncollaborative cell modeling precoding, dispatch.at the same time analysics three kinds ofphysical channels layer merge. Assess the transmission performance of singl-usercooperative. Compare three kinds of transmission performance, they are non-com twocells collaborative and three cells collaborative. Get the result the relationship betweenthe edge user performance improvements and overall performance.