initial frequency meaning in English
起始频率
Examples
- In addition , based on fft and remainder algorithm , the modulation rate and initial frequency of sub - sampling uwb lfm signal are estimated unambiguously in negative snr
该方法通过fft和余数定理解频率模糊,解决了负信噪比条件下超宽带线性调频信号调制斜率和初始频率的估计问题。 - Simulations with respect to two models , prove that the method can track the frequency accurately and instantly , and have the preferable effectiveness on the abruptly fluctuating - frequency power signals , at the same time , this method overcomes the constraint of synchronous sampling and has the better astringency with different initial frequency
针对两种模型进行仿真，表明该方法能够较为精确与快速地跟踪电网频率，尤其针对突变频率的信号，具有较好的跟踪效果；同时算法克服了同步采样条件的限制，通过迭代，在不同初始频率下均具有较好的收敛性。 - One new method that the uwb signal can be received ambiguously has been presented in this dissertation . furthermore , the sampling lfm signal becomes two sine signals with different frequencies based on two different delay processes . based on fft and remainder algorithm , the modulation rate and initial frequency of sub - sampling lfm signal are estimated precisely and unambiguously in negative snr
该方法通过在数字域对信号进行两路不同的延时和余数定理实现欠采样条件下超宽带线性调频信号的调制斜率和初始频率的无模糊估计,在不降低参数估计精度的前提下,解决了欠采样方法引起硬件复杂度增加的问题。 - Without deteriorating accuracy of estimated parameters , this method needs less hardware . 4 . based on esprit algorithm and remainder algorithm , the modulation rate and initial frequency of sub - sampling uwb lfm signal can be estimated unambiguously and precisely in a low snr background
4 、研究了一种基于欠采样和esprit算法的超宽带线性调频信号的调制斜率和初始频率的参数估计方法,把具有优越性能的esprit方法运用于欠采样条件下的超宽带线性调频信号的参数估计中。 - After the compensation based on the rule of the minimum entropy , the resolution of the cross - range image is lower as the large size and non - uniform rotation , which cause the image to be not right at all sometimes . in order to eliminate effect of the non - stationary rotation , the first order approximation and relax algorithm are adopted to search the initial frequency , amplitude , frequency modulation rate and obtain the dynamic image of the target at any time
分析了低分辩雷达的成像算法，建立在最小熵补偿基础上的算法得到的横向像的分辨率仍然比较低，尤其对大的目标和机动目标，为此我们采取了一阶近似的relax算法搜索目标的初始频率、幅度、解调率从而获得目标的动态一维像，仿真数据和试验结果证明该方法是有效的。