【作者】 周涵之；

【导师】 啜钢；

【作者基本信息】 北京邮电大学 ， 通信与信息系统， 2010， 硕士

【摘要】 干扰一直是移动通信系统中一个重要的研究课题。干扰的种类很多,比如杂散干扰、阻塞干扰、互调干扰等等。系统共存的邻道干扰分析方法也很多,大体上说可以分为两大类,确定性计算的分析方法和系统仿真模拟方法。本文首先介绍了如何采用确定性计算的方法对TD-LTE系统和TD-SCDMA系统基站之间的干扰进行计算和分析。根据基站的各种收发特性和无线性能指标,例如发射端的邻道功率泄露(ACLR)、杂散干扰；以及接收端的邻近信道选择性(ACS)、阻塞特性。同时分别对基站之间共区域和共站址两种情况进行了分析,得出了在各种性能指标下不同系统基站之间共存所需要的额外隔离度,分析和解决了TD-LTE系统和TD-SCDMA系统基站之间的共存问题。本文重点介绍了利用经典的Monte Carlo方法对系统之间的干扰共存情况进行仿真。通过构造TD-LTE系统和TD-SCDMA系统静态仿真平台,对两系统之间的干扰共存课题作了详细研究。文中着重讨论了系统之间邻道干扰功率比(ACIR)模型、干扰模型和评估指标,仿真出了在三种不同的系统偏移情况下,由于系统之间邻频干扰所产生的上、下行容量损失和吞吐量损失的性能指标,并且给出了合理的分析和解释。更重要的是,本文的一些计算结果和分析结论对于TD-LTE系统和TD-SCDMA系统的共存部署提出了良好的建议和方案。更多还原

【Abstract】 Interference in mobile communication systems has been an important research topic aspect. There are many kinds of interferences, such as spurious interference, obstruction interference, inter-modulation interference and so on. Also, there are lots of System analysis methods for coexistence of adjacent-channel interference, and that can be divided into two categories, deterministic calculation method and system simulation methods.This paper describes how to use the method of deterministic calculation to analyze the interference of base stations between TD-LTE system and TD-SCDMA system. According to a variety of base station transceiver features and wireless performance targets, such as the adjacent channel power leakage (ACLR) and spurious interference from the transmitter; as well as the adjacent channel selectivity (ACS) and blocking features from the receiver. Meanwhile the situations of co-area and co-location are considered. The additional isolation is obtained for resolving the co-existence problem between TD-LTE systems and TD-SCDMA system.This paper focuses on the Monte Carlo simulation method for the system coexistence by building the static simulation platform, and the interferences between the two systems were studied in detail. This article describes the system model of adjacent-channel interference power ratio (ACIR), interference model and evaluation criterions. Three different offset conditions are considered, due to the adjacent channel interference between systems, the capacity loss and throughput loss performance in uplink and downlink are simulated, and a rational analysis and Interpretation is given.More importantly, some useful and proposal calculation results and conclusions for the coexistence of TD-LTE system and TD-SCDMA system are presented in this paper.更多还原