摘要
对于800MHz频段码分多址(CDMA)系统基站和直放站的杂散辐射对全球移动通信系统(GSM)900的干扰限制,信产部无(2002)65号文已作了明确规定。至于GSM900对CDMA的干扰,以及GSM1800和个人接入系统(PAS)等时分多址系统对第三代移动通信系统中宽带码分多址(WCDMA)系统的干扰影响有多大,文中以CDMA系统的抗干扰机理为基础,分析多系统共(站)址时这些干扰对CDMA系统容量的影响。工程实践中,通常采用滤波器来减少干扰对系统容量的影响,文中推导的公式可用来计算滤波器的衰减指标。
The interfering power of the discrete radiation of CDMA800 BTS and rep eater Tx affecting GSM900 should be limited in accordance with the document MII-R(2002)No.65. Then, how is the interference of GSM900 has on CDMA system and/ o r other TDMA systems (e.g. GSM1800 and PAS)and on wideband CDMA (WCDMA) system o f 3G mobile communication system? With anti-interference mechanism of CDMA syste m in mind this paper analyzes what the effect of interference has on CDMA system capacity based on spreading gain when they are co-base stations. In engineering , filters are normally used to reduce the effect of interference on system capac ity. The formula deduced in this paper may be used to calculate the attenuation value of the filter.
出处
《电信快报》
2004年第12期5-8,共4页
Telecommunications Information
