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基于经典的系统设计流程,设计并实现了一种应用于家庭网络核心SoC平台中无线通信系统接收机的专用数字中频下变频器。在系统级,利用系统建模工具MATLAB,完成了数字下变频器的行为建模及其功能划分;在电路级,完成了数字下变频器中主要功能模块的VLSI实现及其功能仿真。考虑到系统实现的复杂性及其硬件资源,对于数字滤波器,采用CSD和RAG等优化策略;对于数控振荡器,采用一种新型的结合LUT和CORDIC算法优点的混合算法实现方案。最后,搭建了基于XilinxVirtexIIXC2V1000-4FG256FPGA的家庭网络无线通信系统验证平台,完成了数字中频下变频器的功能验证。
Based on the classic system design process, a dedicated digital IF downconverter is designed and implemented for the receiver of wireless communication system in the core SoC platform of home network. At the system level, using the system modeling tool MATLAB, the digital down-converter behavior modeling and its function division are completed. At the circuit level, the VLSI implementation and function simulation of the main function modules in the digital down-converter are completed. Taking into account the complexity of the system and its hardware resources, the optimization strategy of CSD and RAG is adopted for the digital filter. For the NC oscillator, a new hybrid algorithm combining the advantages of LUT and CORDIC algorithm is adopted. Finally, a verification platform of home network wireless communication system based on XilinxVirtexIIXC2V1000-4FG256FPGA is built, and the functional verification of the digital IF downconverter is completed.