| 1. | The amplitudes of the two ffts are the same , but their phases , < px and < p2 , changes with the range differently
Rao下限，在信噪比为6db ， fft长度为1024的情况下，频率估计均方根误差小于fft频率分辨率的1 。 |
| 2. | The thesis concludes that spectrum scan speed can reach 680mhz / s at 1khz frequency resolution when it has 8192 points complex data
本文研究指出，谱分析数据量为8192点复数据时， 1khz频率分辨率要求下的扫描速度可达680mhz s以上。 |
| 3. | Conversely , the coefficients in high frequency have higher resolution to time and lower resolution to frequency than the ones in low frequency
即在低频部分具有较高的频率分辨率和较低的时间分辨率，在高频部分具有较高的时间分辨率和较低的频率分辨串。 |
| 4. | In receiver system development , there are some innovations in the design of high linearity and high dynamic range , also in the circuitry realization
接收机采用两次变频超外差式结构设计，第一中频为高中频。接收机频率合成器采用dds来实现1hz的频率分辨率。 |
| 5. | Digital waveform generator which use dds ( direct digital synthesize ) technology has many merits like high frequency resolution , good stability and easy to generate signal
基于dds技术的数字波形发生器具有频率分辨率高、稳定性好、可灵活产生多种信号的优点。 |
| 6. | Uncertainty principle points out that , which means that high time resolution and high frequency resolution can not be obtained both at the same time in spectrum analysis
测不准原理表明： t ? f 1 / 4 ，即在一次谱分析中，时间分辨率和频率分辨率不能同时达到高分辨率 |
| 7. | It has the advantage of high frequency resolution and low phase noise when compared with traditional integer - n phase locked loop ( npll ) frequency synthesis
分数分频( fnpll )频率合成器则是近年来出现的一种新技术，它与传统的整数分频频率合成器相比具有频率分辨率高、相位噪声低等优点。 |
| 8. | Direct digital frequency synthesizer ( dds ) is an apparatus to generate wave on the required frequency . it provides high frequency resolution , rapid frequency transforma - tion and other superiority
直接数字频率合成器是现代频率合成的主要工具,它有频率分辨率高,频率转化快等众多优点。 |
| 9. | The agilent technologies 33250a function arbitrary waveform generator uses direct digital - synthesis techniques to create a stable , accurate output on all waveforms , down to 1 hz frequency resolution
Agilent 33250a函数任意波形发生器使用了直接数字合成技术,可在所有波形上产生频率分辨率达 |
| 10. | Through the research of direct digital synthesizer ( dds ) used as a divider in phase lock loop ( pll ) , a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized
摘要通过对直接数字合成器在锁相环路中作为分频器应用的研究，使频率合成器可以在实现超细频率分辨率的同时达到高的频谱纯度。 |
