GSM 测教材试技术培训

GSM 测试技术

测试培训

Agenda

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测试目的测试基本原理测试项目

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测试目的????维持高质量无线链路避免干扰系统中其他用户或频谱ShareMeGSM特点

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Separate Bands for Uplink and DownlinkTDMA and FDMA Multiplex

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124 Frequency Channels (ARFCN) for GSM900DL frequency = UL frequency + 45 MHz for GSM900

200kHz Channels

8 Mobiles share ARFCN by TDMA270.833 kbits/sec. rate

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0.3 GMSK Modulation

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空中接口示意Time7Amplitude432101 2 3 4 5 6ARFCN#65Timeslot #Frequency