摘要
本文介绍了一般测频方法,提出了一种基于DFT的快速测频算法。文中对该测频方法进行了理论分析,并对其性能进行分析和仿真,得出了在实际设计中采样点数与搜索频段数之间的最佳关系。完成了该方法在FPGA上的实验工作。证明该方法是简单可行的,其计算量小、抗干扰能力强,可提高数字接收机的测频速度和精度。该方法对数字接收机测频部分设计有较强的理论和实际意义。
Some normal frequency estimation methods are introduced. A fast Estimation method, based on DFT, is raised. The theoretical analysis, performance analysis and simulation results are also given, Bringing out the best relation between the counts of samples and the counts of frequency segments. The results of applying it on FPGA prove that the method is easy and feasible. It has very little quantity of operations, high operation speed and strong capability of anti - noise. It can highly improve frequency estimation speed and precision of digital receivers. It will be helpful to the design of frequency estimation devices of digital receivers on both respects of theory and practice.
出处
《电子信息对抗技术》
2006年第3期3-5,32,共4页
Electronic Information Warfare Technology
