文档介绍：解析TD—LTE系统干扰
【摘要】文章对TD-LTE的系统内外干扰的机理进行了系统分析,并结合标准中的设备性能最低要求计算出典型情况下系统间隔离度要求,以及隔离度的实现方法。
Articles 【 pick to 】 the system inside and outside interference mechanism of td-lte has carried on the system analysis, combined with the standard minimum requirements of the equipment properties calculated typically isolation between system requirements, and the realization of the isolation methods.
【关键词】TD-LTE 干扰隔离度
【 key words 】 td-lte interference isolation ratio
1 概述
1 overview
随着TD-LTE标准的冻结、设备的成熟以及移动互联网业务飞速发展,TD-LTE已经成为业界的关注焦点。而TD-LTE系统内外干扰问题是网络部署时必须要考虑的关键问题之一。
As the td-lte standards to freeze, the mature of the equipment as well as the rapid development of mobile business td-lte has e the focus of concern of the industry. But td-lte system inside and outside interference problem is work deployment must be one of the key issues to consider.
TD-LTE系统面临的干扰包括噪声Pn、系统内干扰Iintra-system和系统间干扰Iinter-system,下面将分别对这三种干扰进行分析。
Td-lte system faced by interfering in Pn, system including noise interference Iintra Iinter - system - between the system and the system interference, the following will respectively analyze the three interference.
2 噪声
2 the noise
噪声可以按照来源分为接收机内部噪声和外部噪声。接收机内部噪声包括导体的热噪声和放大器的噪声放大;外部噪声是指来自接收机以外的非移动通信发射机的电磁波信号,可以分为自然噪声和人为噪声。
Noise can be divided into internal noise and external noise receiver according to the source. Internal noise including conductors of heat receiver and amplifier's noise amplification; External noise is from outside of the mobile transmitter receiver of ic signals, can be divided into natural and man-made noise.
一般在进行分析时主要考虑接收机内部噪声,可通过以下式子计算得到:
The receiver when carries on the analysis of main consideration internal noise, can be calculated by the following formula:
Pn=KTB+NF (1)
Pn + NF = (KTB (1)
其中:
Among them:
K:波尔兹曼常数(Boltzmann constant),×10-23JK-1;
K: Boltzmann constant (the Boltzmann constant), x 10-23 jk - 1;
T:开尔文绝对温度,一般计算中取常温290K;
T: kelvin, the absolute temperature, putation of norma