...的最低频率(2倍频)对稀疏信号进行采样,一样能够得到精确的信号重建结果,这种采样方法,称为次奈奎斯特采样(Sub-Nyquist Sampling)。将该采样方式应用于超声波成像之中,可以有效的减少数据点和采样频率,这意味着更小的机器尺寸以及更少的电能损耗。
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In this paper, several important algorithms of frequency measurement are analysed in detail, and these algorithms can simultaneously process much signal. Afterward, some schemes of frequency measurement with sub-Nyquist sampling rate are summed up.
本文详细分析了几种具有同时多信号处理能力的数字测频算法，对它们的测频性能进行了仿真；讨论了几种欠采样数字测频结构，结合仿真分析了它们各自的优缺点，并重点介绍了单延迟双通道欠采样测频结构，对其中的部分算法进行了改进。
参考来源 - 高速宽带数字测频技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The problem of parameter estimation and array calibration with sub-Nyquist sampling is studied in this doctoral dissertation.
论文主要研究时间（频率）、空间欠采样条件下的参数估计与阵列校正方法。
Based on an auxiliary time-delay channel and ESPRIT approach, a new algorithm for wide band frequency estimation with sub-Nyquist sampling was proposed.
为了克服现有的欠采样频率估计方法存在的算法复杂、工程实现困难等问题，本文提出了一种基于虚拟仪器的三采样率切换的频率估计方法。
The frequency aliasing due to sub-Nyquist sampling can be resolved by the proposed frequency aliasing resolving algorithm and information from the time-delay channel.
文中，欠采样所引入的频率模糊由增加的延迟通道提供的信息加以消除，并提出了相应的频率解模糊算法。
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