1、 I 摘 要 分析数字调幅系统优越的技术特性,制定以现场可编程门阵列为核心的数 字调幅系统设计方案,实现过程中应用 VHDL 硬件描述语言对不同的功能模 块进行定义和编程,仿真验证了系统模块的功能。仿真正确后,选取满足要求的 可编程器件进行综合工作。根据测试结果分析,数据满足设计要求,实现了系统 的功能。 文中首先分析了调幅信号发生器的数学表达式,然后根据其数学表达式,在 matlab/simulink 下建立相应的数学模型,然后利用 DSP Builder 模块库中的 SignalCompiler 工具将此模型转换为VHDL 语言, 最后在QuartusII 中对其进行编 译直至下载到 FP
2、GA 中,实现相应的电路。这种设计方法可以快速进行数字信号处理 器的设计,而且又便于修改和扩充其功能,整个设计思路灵活,图形界面简单直观,开 发周期短。 关键词：数学模型 调幅信号 调制度 现场可编程门电路 II Abstract The realization method based on Programmable Gate Array ( FPGA) is int roduced ,and it s superior technical characteristics are analyzed. According to it s characteristic , the high ac
3、curacy Digital Amplitude Modulation System using FPGA and Very High Speed Integrated Circuit Hardware Description Language (V HDL) to finish all programs of the digital system. The simulation result s indicate and obtain graphs ,comparing with the t raditional methods and systems ,this type of the d
4、igital system realized by FPGA have many merit s such as high precision ,low-power and soon on ,which can satisfy the develop tendency of test facility such as digitization and software. The first analysis of the AM signal generator of the mathematical expression, then according to their mathematical expression,in matlab / simulink established under the corresponding data model, and then using DSP Builder module in the SignalCompiler this model into a tool of VHDL And finally in its QuartusII c
