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针对当前软件无线电技术发展的中频数字化,提出了一种基于FPGA的中频数字接收机设计方案。利用MATLAB仿真验证该方案实际可行,并用AD6645和低成本的EP2C5T144C8为核心芯片构建一个通用的数字接收机平台,更好地体现软件无线电体系结构的开放性和全面可编程性。从系统的参数选择到软硬件设计,给出了详细的说明。最后,进行了联合测试,给出了关键的测试结果,试验结果表明,该接收机系统结构简单,成本低,有良好的实用性和通用性。
In view of the current IF digitization of software radio technology, a design scheme of IF digital receiver based on FPGA is proposed. The feasibility of this scheme is verified by MATLAB simulation, and a common digital receiver platform is built with AD6645 and low cost EP2C5T144C8 as the core chip to better reflect the openness and full programmability of software radio architecture. From the system parameters to hardware and software design, gives a detailed description. Finally, the joint test was carried out, and the key test results were given. The test results show that the receiver system has the advantages of simple structure, low cost, good practicability and versatility.