基于DDS的复杂信号模拟设计

随着通信技术的不断发展,信号复杂程度越来越高.本文借助软件无线电的思想,以现场可编程逻辑门阵列(FPGA)和直接数字频率合成(DDS)为中心,构成通用的硬件平台,通过更换软件的方法模拟各种复杂信号.采用该方案可实现信号模拟,且电路简单易于实现.最后,本文提供了脉冲压缩雷达(PCR)信号模拟的硬件设计.实际测试结果表明,本文给出的设计方法合理有效,有较高的实用价值.

Design of complex signal simulation based on DDS

With the development of the communication technology, signal becomes more and more complex. In this paper, focusing on field programmable gate arrays (FPGA) and direct digital synthesis (DDS), a general hardware platform was proposed by the idea of software radio, and by means of updating the software to fulfill various complex signal simulation. And using this approach, the circuit was simple and effective. Finally, the hardware design of pulse compress radar (PCR) was proposed. The test results in practice show that the design is valid and useful.