TD-LTE系统与异系统干扰共存研究
发布时间：2019-01-10 07:15
【摘要】：当前,国内运营商正在大规模建设TD-LTE蜂窝移动通信网。而无线电频谱资源的稀缺性则日益凸显,将来很可能会出现TD-LTE系统与异系统使用相同或相邻频段在同一地理区域内进行网络部署的情形。由于无线通信系统收发机设备的非理想特性,会引起同一区域内共存无线通信系统之间的互相干扰,从而影响无线通信系统性能。因此,应采取怎样的保护度及相应的规避措施,以提高700MHz频段TD-LTE-CR与数字广播电视系统性能,以及对功控参数进行合理的取值,改善对功率的分配,可以使得TD-LTE MiFi大功率用户可以像普通UE一样与其它系统良好的共存,而对系统性能没有太大影响,以上两点对于理论研究和工程实践都具有重要意义。本文首先综合采用确定性分析和系统级蒙特卡洛静态仿真的方法,对700MHz频段TD-LTE与数字广播电视系统(DTMB)的干扰共存问题进行了研究。通过细致分析所设计的4种共存场景,得出了在城市和农村环境下系统之间共存所需的隔离条件,为进行合理的频谱规划与网络部署提供参考。接着考虑在TD-LTE基站加入CR(认知无线电)模块的情况,通过检测空中信号获取所处无线环境下频谱占用信息的频谱检测方法,采用频谱检测方式的CR技术,改变传统的固定频率分配为动态的频率分配。通过检测DTMB系统的频谱占用信息,来控制TD-LTE基站的工作状态。此时的仿真场景也有所改变,仍然综合采用确定性分析和系统级蒙特卡洛静态仿真的方法,在一定的CR检测正确率、CR检测方式、保护距离、隔离带宽等约束条件下,计算出需提供的额外邻信道干扰功率比值(ACIR)。得出两个系统之间干扰分析的结论和抑制干扰的规避措施。最后,本文研究了TD-LTE大功率MiFi用户与LTE FDD系统及WCDMA系统之间的干扰共存问题,仍然采用系统级蒙特卡洛静态仿真的方法,仿真结果表明：对功控参数进行合理的取值,改善对功率的分配,可以使得在所考察的仿真场景下TD-LTE MiFi大功率用户可以像普通UE一样与其它系统良好的共存,而对系统性能没有太大影响。
[Abstract]:At present, domestic operators are building TD-LTE cellular mobile communication network on a large scale. However, the scarcity of radio spectrum resources is becoming increasingly prominent. In the future, it is likely that TD-LTE systems and other systems will use the same or adjacent frequency bands to deploy the network in the same geographical region. Due to the non-ideal characteristics of transceiver devices in wireless communication systems, the mutual interference between wireless communication systems in the same region will be caused, which will affect the performance of wireless communication systems. Therefore, what protection measures should be taken to improve the performance of 700MHz band TD-LTE-CR and digital radio and television system, and to select the reasonable value of power control parameters, and to improve the distribution of power, The TD-LTE MiFi high power users can coexist well with other systems like ordinary UE without much influence on the system performance. The above two points are of great significance for both theoretical research and engineering practice. In this paper, the interference coexistence of 700MHz band TD-LTE and digital broadcast television system (DTMB) is studied by means of deterministic analysis and system level Monte Carlo static simulation. Through the detailed analysis of the four kinds of coexistence scenarios designed, the isolation conditions needed for the coexistence between the system in the urban and rural environments are obtained, which provide a reference for the rational spectrum planning and network deployment. Then we consider adding CR (Cognitive Radio) module to the TD-LTE base station, obtain the spectrum occupation information of the wireless environment by detecting the air signal, and adopt the CR technology of the spectrum detection mode. Change the traditional fixed frequency allocation to dynamic frequency allocation. The working state of the TD-LTE base station is controlled by detecting the spectrum occupation information of the DTMB system. At the same time, the simulation scene is also changed, and the methods of deterministic analysis and system-level Monte Carlo static simulation are still used, under certain CR detection accuracy, CR detection mode, protection distance, isolation bandwidth and other constraints. Calculate the additional neighbor channel interference power ratio (ACIR). To be provided The conclusion of the interference analysis between the two systems and the measures to avoid the interference are obtained. Finally, the problem of interference coexistence between TD-LTE high power MiFi users, LTE FDD system and WCDMA system is studied. The static simulation method of system level Monte Carlo is still used. The simulation results show that the power control parameters are reasonably selected. By improving the power distribution, TD-LTE MiFi users can coexist well with other systems just like the ordinary UE in the simulation scenarios investigated, without much influence on the system performance.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5
本文编号：2406041
[Abstract]:At present, domestic operators are building TD-LTE cellular mobile communication network on a large scale. However, the scarcity of radio spectrum resources is becoming increasingly prominent. In the future, it is likely that TD-LTE systems and other systems will use the same or adjacent frequency bands to deploy the network in the same geographical region. Due to the non-ideal characteristics of transceiver devices in wireless communication systems, the mutual interference between wireless communication systems in the same region will be caused, which will affect the performance of wireless communication systems. Therefore, what protection measures should be taken to improve the performance of 700MHz band TD-LTE-CR and digital radio and television system, and to select the reasonable value of power control parameters, and to improve the distribution of power, The TD-LTE MiFi high power users can coexist well with other systems like ordinary UE without much influence on the system performance. The above two points are of great significance for both theoretical research and engineering practice. In this paper, the interference coexistence of 700MHz band TD-LTE and digital broadcast television system (DTMB) is studied by means of deterministic analysis and system level Monte Carlo static simulation. Through the detailed analysis of the four kinds of coexistence scenarios designed, the isolation conditions needed for the coexistence between the system in the urban and rural environments are obtained, which provide a reference for the rational spectrum planning and network deployment. Then we consider adding CR (Cognitive Radio) module to the TD-LTE base station, obtain the spectrum occupation information of the wireless environment by detecting the air signal, and adopt the CR technology of the spectrum detection mode. Change the traditional fixed frequency allocation to dynamic frequency allocation. The working state of the TD-LTE base station is controlled by detecting the spectrum occupation information of the DTMB system. At the same time, the simulation scene is also changed, and the methods of deterministic analysis and system-level Monte Carlo static simulation are still used, under certain CR detection accuracy, CR detection mode, protection distance, isolation bandwidth and other constraints. Calculate the additional neighbor channel interference power ratio (ACIR). To be provided The conclusion of the interference analysis between the two systems and the measures to avoid the interference are obtained. Finally, the problem of interference coexistence between TD-LTE high power MiFi users, LTE FDD system and WCDMA system is studied. The static simulation method of system level Monte Carlo is still used. The simulation results show that the power control parameters are reasonably selected. By improving the power distribution, TD-LTE MiFi users can coexist well with other systems just like the ordinary UE in the simulation scenarios investigated, without much influence on the system performance.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5
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