CDMA系统中基于FPGA的DAGC实现

Application of DAGC Based on FPGA in CDMA System

为了在CDMA系统中实现大动态ADC采样结果与基带调制解调芯片CSM5000的接口,在FPGA中实现了数字自动增益控制(DAGC)。对所设计的DAGC原理和仿真结果进行了分析。实践表明所设计的DAGC易于在FPGA中实现,参数设置灵活,占用资源少,有效地实现了与CSM5000接口,并且采用DAGC省去了模拟增益控制器件的复杂调试,提高了CDMA系统的集成度和稳定性。

Digital Auto Gain Control （DAGC） is applied based on FPGA in CDMA system, for the interface between data sampled from large scale ADC and CSM5000 which is baseband modem chip. Principle of designed DAGC and results of simulation are analyzed in paper. It is proved that designed DAGC possesses easy application in FPGA, flexible setting on parameters,less resource occupied and effective interface with CSM5000. And complicated debug of analog gain control is leaved out by making use of DAGC, which also improves integration and stability of CDMA system.