Analysis And Optimization Of Co-Channel Interference In Cellular Mobile Communications

LTE technology is a representative wireless access technology proposed by 3GPP, which can achieved a variety of bandwidth, and high speed dates transmission. With the rapid development of mobile communication technology, The lack of spectrum resourse is to limit the communication system performance upgrades, the problem of lacking of spectrum resourse is particularly prominent on the progress of LTE network construction.Reuse of spectrum resources is the core technology to enhance the spectral efficiency, but co-channel interference problems have cropped up, so how to solve the problem of co-channel interference is not only a hot issue in today’s communications industry research, but also one of the key issues to be solved at the moment.The solutions for co-channel interference problem are: interference coordination, interference randomization and reasonably efficient network planning. Various equipment manufacturers in communication industry have also put forward their own solutions to solve this problem,such as: HUAWEI, Siemens, Ericsson, where a higher degree program recognized are soft frequency reuse of HWT and frequency fractional frequency reuse of Siemens.In the first part of this paper introduces the research background and significance, as well as domestic and international current situation. The second part analyzes the causes of co-channel interference. Solutions of communications giant are listed, and analyzes the benefits and problems of this program. The third part set up 19 cell model of the LTE system, and according the system performance of area under the different reuse factor and ratio of center radius to analyse, then receive the guidance parameters of network. The fourth part carries on the simulation analysis of the soft frequency reuse technology in LTE system,and observe the SINR, throughput capacity, distribution of coverage. According to the distribution of date,receive the system performance under the different traffic conditions. Then, using the parameters do the actual test in the CDS single site verification software test. The fifth part, Through the comprehensive analysis of the soft frequency reuse and comp technology integrated application program based on the soft frequency reuse, compared with the traditional frequency reuse mode to verify the advantages of the scheme.