On the basis of design of DDS utilizing FPGA, it presented a method of realizing the altitude modulation by generating the main wave and the modulation wave respectively, and the frequency modulation by changing frequency tuning word of main DDS.
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- 在利用FPGA實(shí)現DDS的基礎上,使用兩路DDS分別產(chǎn)生主波形和調制波形,方便地實(shí)現兩個(gè)任意波信號的幅度調制; 同時(shí),通過(guò)調制波形數據實(shí)時(shí)控制主DDS的頻率控制字,用數字的方法直接實(shí)現波形的各種頻率調制。
