相位码补偿法实现DDS无相位截断杂散的研究

发布时间：2018-06-09 02:51

本文选题：直接频率合成 + 相位截断杂散　；参考：《计算机工程与应用》2017年04期

【摘要】：介绍了存在相位截断的直接频率合成(DDS)系统的原理,通过分析正弦波形相位幅度映射关系的方式阐述了相位截断杂散的来源。推导了在高频率分辨率和正弦波形无损压缩的条件下截断后相位码长最佳值,并提出了在相位截断之前对相位码进行补偿以消除误差的方法实现无相位截断杂散DDS系统,最后利用MATLAB仿真和FPGA硬件电路验证了该方法的有效性。
[Abstract]:The principle of the direct frequency synthesis (DDS) system with phase truncation is introduced. The source of phase truncated stray is expounded by analyzing the phase amplitude mapping of sinusoidal phase. The optimal value of phase code length after truncation is derived under the condition of high frequency resolution and sinusoidal waveform lossless compression, and it is proposed that the phase truncation is before the phase truncation. The phase code is compensated to eliminate the error, and the phase truncated stray DDS system is realized. Finally, the effectiveness of the method is verified by using the MATLAB simulation and the FPGA hardware circuit.
【作者单位】：哈尔滨工程大学信息与通信工程学院;海军航空工程学院青岛校区;
【基金】：国家自然科学基金(No.61301200) 中央高校基本科研业务费专项资金项目(No.HEUCF150808)
【分类号】：TN741

【相似文献】