filter center

With a devising technique of the narrowband filter, a new design method of the UWB receiver was presented and the demand for design of the filter center frequency and bandwidth also were quantificational given.

利用窄带滤波器设计技术，提出了一种新型UWB接收机设计方法，并定量给出了滤波器中心频率和带宽设计的要求。

In lidar system basing on the brim detecting technology, it is crucial to determine the absorption spectral profiles of molecule absorption cell filter and the center frequency of emission laser signal in design of lidar system.

基于边缘探测技术的激光雷达系统中，确定分子吸收池滤波器的吸收光谱谱线，以及确定发射激光信号的中心频率，是实现激光雷达系统设计的核心问题。

Design and Realization on the Low Frequency Band Pass Filter with Center Frequency Adjustment

中心频率可调节的低频带通滤波器设计与实现

VSWR within a closely related position with the tap, but the length of filter tap on its center frequency, bandwidth, so little impact.

而通带内的驻波与抽头的位置紧密相关，而抽头长度对其中心频率，带宽影响微乎其微。

Before the pitch detection, the voiced is pretreated by band-pass filter, center clipping and digital filter to reduce the effects of formant and high-frequency noises;

在基音检测前用带通滤波、中心削波和数值滤波等方法进行预处理，去除共振峰和高频噪声的影响；

In the paper, the design method of micro-strip open loop bandpass filter is introduced, and one example of filter with 1.85 GHz center frequency, 10.5% fractional bandwidth and the second one with 2.15 GHz center frequency, 9% fractional bandwidth are given.

分析了具有传输零点带通滤波器的设计方法，给出了中心频率为1.85GHz，分数带宽为10.5%和中心频率为2.15GHz，分数带宽为9%的微带开路环带通滤波器设计实例。

The design process is simple and can be simulated by the sophisticated SAW unit electrode and interdigital parameters. The parameters adjustment is very simple when filter center frequency and bandwidth changes.

设计过程简洁，可采用成熟的SAW单元电极和叉指参数进行计算机模拟，且当所设计的滤波器通带频率和带宽变化时，参数调整方便。

Furthermore, new concepts of equivalent PEC wall and equivalent microwave resonance cavity are suggested to analyze the resonance phenomenon and filtering effect. The relationship between the filter structure and the filter center frequency is acquired and a method to calculate this center frequency is proposed.

进一步通过引入等效PEC面与等效微波谐振腔的概念，分析了谐振现象与滤波特性之间的关系，得到了滤波器中心频率与滤波器结构参数的关系式与中心频率的计算方法。

The time field analysis module contains the timely wave return 、 digital filter 、 axis center track analyzing 、 demodulation analyzing 、 trend analyzing 、 mutual analyzing.

时域分析包括时域波形回放、数字滤波、轴心轨迹分析、解调分析、趋势分析、相关分析。

The filter is featured with center frequency of 65.28 MHz, code rate of 4.08 Mbit/ s ( with tap space of 0.245 μ s) and duration of 250.735 μ s. The ratio of self related peak value to maximum sidelobe is 26 dB.

匹配滤波器的中心频率为65.28MHz，编码速率为4.08Mbit／s（抽头间隔为0.245μs），持续时间为250.735μs，自相关峰值与最大旁瓣比为26dB。

A few changes was done on Vold-Kalman adaptive filter, and a band pass filter with center frequency vary with rotating speed was designed.

本文在Vold-Kalman自适应滤波器的基础上进行了改进，设计一个通带中心频率随着转速变化而变化的带通滤波器。

A method of moving targets tracking based on fuzzy entropy clustering and Kalman filter forecasting is advanced, and the forecasting value of Kalman filter as the center of next frame cluster is used. This method reduces the iterative numbers and increases the real-time tracking.

本研究提出了基于模糊熵聚类和Kalman滤波预测的区域跟踪方法，用Kalman滤波的预测值作为下一帧图像运动区域的聚类中心，从而减少了迭代次数，加强了跟踪的实时性。

Design of Bandpass Filter for Center Frequency Stageless Selecting

中心频率可连续调节带通滤波器设计

It is proved by the analysis of the simulated signals and different signal to noise ratio experimental data that this method can effectively determine the filter center frequency and bandwidth, thereby improving the signal to noise ratio and the diagnosis of bearing faults.

通过对仿真信号和不同信噪比实验数据的分析，证明此方法能够有效确定滤波中心频率和带宽，从而提高信号的信噪比，实现对轴承故障的诊断。

The method is successfully used to SAW filter with center frequency of 914 MHz, bandwidth of 17 MHz.

并成功地用于914MHz，带宽17MHz滤波器的设计。