3g基站培训(wcdma).ppt

MCPA的特点:MCPA是一个46dBm(40W)的多载波功率放大器;能够同时处理1至4个5MHz的载波;高功效;带宽:20MHz(在2110-2170频段内) 载波及小区的几种配置 1 x 1 (20 W or 30 W) , 2 x 1 (20 W or 30 W) , 3 x 1 (20 W or 30 W) ; 1 x 2 (20 W or 30 W), 2 x2 (20 W or 30 W) , 3 x 2 (20 W or 30 W) ; 1 x 1 (60 W), 2 x 1 (60 W), 3 x 1 (60 W) 说明:N xM(N是指小区数,M是指载波数.) 三组不同配置的AIU和MCPA的连线分别如下 面的图所示. 广东南方通信建设股份有限公司 爱立信3G基站培训 射频框(RF subrack)实图 广东南方通信建设股份有限公司 爱立信3G基站培训 射频框(RF subrack):由多个射频单元组成,不包换功率放大功能,数/模转换,射频信号的调制和解调,载波合成和分裂. Antenna Interface Unit (AIU) Radio Frequency Interface (RFIF) Board Switch Core Board (SCB) Transceiver (TRX) Board Dummy Board 射频框(RF subrack)常以下面部分组成: 广东南方通信建设股份有限公司 爱立信3G基站培训 Antenna Interface Unit (AIU):由滤波单元、控制单元、合成单元和分裂单元组成. The filter and control unit provides the following: Duplex filtering of the TX and RX signal Flexible frequency and signal splitting Low-noise amplification of the RX signal Power measurement of TX signal The combiner and splitter unit performs: Frequency combination in the downlink, Signal splitting and high power combination when two MCPA modules are used Frequency combination can be either two-way or four-way (when three frequencies have to be combined, the fourth input is unused). When using two MCPA modules for amplification the combined signal is split and, after amplification, the signals are coherently combined again and sent to one antenna. Number of units: 1 - 3 广东南方通信建设股份有限公司 爱立信3G基站培训 Radio Frequency Interface (RFIF) Board:RF框到BB框的连接板,传送上下行数据和时间信令. Number of units: 1 – 2 Transceiver (TRX):数模转换、信道滤波、 迟延和增益调整、射频信号的调制和解调、 A TRX board comprises two independent transceivers for two TX and RX signal pairs. Number of units: 1 - 6 广东南方通信建设股份有限公司 爱立信3G基站培训 多载波功放框(MCPA subrack) 广东南方通信建设股份有限公司 爱立信3G基站培训 MCPA框一般由以下几部分组成: MCPA(Multicarrier Power Amplifier )多载波功率放大(最多六个板位) MCPA hub Dummy MCPA MCPA:有两种,一种是20W的射频功率放大,另外一种是30W的射频功率放大.每个功率放大器能同时放大四个射频载波功率. Number of units: 1 - 6 MCPA Hub: 是MCPA和RFIF板之间的连接接口 . Number of units: 1 广东南方通信建设股份有限公司 爱立信3G基站培训 广东南方通信建设股份有限公司 爱立信3G基站