摘要
通过对第三代移动通信系统的长期演进系统(LTE)的干扰进行简要分析,认为LTE系统的上行干扰相对于下行干扰更加复杂、随机。通过理论推导、分析和仿真证实,认为LTE系统的单载波上行干扰大致符合对数正态分布,并且来自相邻小区的干扰占主导因数;与此同时,多载波上的干扰随着频率呈阶梯型起伏,不利于采用自适应调制编码技术,需要采取必要的措施来克服。该结论有利于估算LTE系统容量和调度中的干扰预测。
The paper analyzes the interference of 3G Long Time Evoloution（LTE） system,and gives the conclusion that the uplink interference is fairly complex and stochastic.The theoretic analysis and simulation indicates that the uplink interference of single carrier is conformal to the log-normal distribution,and the interference from neighboring cells is in dominance.Meanwhile,the interference of the multi-carriers preseata stair-like fluctuation,which is not suitable for adaptive modulation and coding technology,and should be properly solved.The conclusion is good for capacity evaluation of LTE system and interference prediction in scheduling.
出处
《通信技术》
2010年第12期47-50,共4页
Communications Technology
关键词
LTE
上行干扰
对数正态分布
LTE
uplink interference
log-normal distribution
