frequency selectivity
英 [ˈfriːkwənsi sɪˌlɛkˈtɪvɪti]
美 [ˈfriːkwənsi sɪˌlɛkˈtɪvəti]
频率选择性
双语例句
- Two sharp attenuation poles can be located close to either side of the desired pass-band to improve the frequency selectivity.
两个衰减极点分别产生在靠近通带的两边，提高了通带频率的选择性。 - We get finally a multilayered LTCC three-stage bandpass filter with a small size and high frequency selectivity.
通过上述场与路相结合的设计方法，获得了尺寸小、频率选择特性好的多层LTCC三级带通滤波器。 - Due to the frequency selectivity and high insertion loss of SAW device, the input must be high pulse whose spectrum width can cover the center frequency of SAW tap delay line.
由于SAW器件具有频率选择性及较高的插入损耗，使得它的输入必须为高脉冲且脉冲的频谱宽度能覆盖SAW抽头延迟线的中心频率。 - The filter has a pair of transmission zeros around the passband, excellent frequency response and frequency selectivity.
该滤波器在通带附近有一对传输零点，具有良好的频率响应以及频率选择特性。 - Orthogonal Multi-Carrier Modulation ( OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。 - And it has frequency selectivity.
且耦合电容具有频率选择性。 - This thesis firstly analyzes the characters of wideband wireless channel in brief, and points out that the wideband wireless channel has double selectivity, which are time selectivity and frequency selectivity.
本文首先简单的分析了宽带无线信道的特点，指出宽带无线信道是一种同时存在时间选择性和频率选择性的双选择性信道。 - The multipath spread will make the signals with high rate, narrow symbol and wide spectrum suffer the influence of frequency selectivity fading and cause ISI between symbols in the transmission to affect seriously the information transmission quality.
而多径扩散现象的存在，会使速率高、码元窄、频谱宽的信号遭受频率选择性衰落的影响，造成传输中的信号码元之间产生码间干扰，严重影响信息传输质量。 - It is characterized by good frequency selectivity, low insertion loss and high attenuation of specified frequency.
它具有频率选择性好，通带插损低，对陷波频点抑制较高的优点。 - It was found in the present study that redifferentiation frequency of callus in E. And it has frequency selectivity.
实验中发现，在培养基中加入适量PEG可以显著提高杜仲胚乳愈伤组织分化频率。且耦合电容具有频率选择性。 - Double T filter is usually used as filtering and selecting circuits in electronic measuring instruments and equipments. And the frequency of the microwave can be made stable due to the frequency selectivity of the resonator.
双T网络由于具有良好的滤波特性和选频特性，常在电子测量仪器的滤波电路或振荡电路中用作滤波网络或选频网络。同时，谐振腔具有的选频特性还可以加强辐射微波的频率稳定性。 - As a result, receptive fields with both orientation and spatial frequency selectivity, similar to Gabor filters, are learned and tested.
我们的实验表明，学习得到的感受场模板在空间频率和方向上都有一定的选择性。 - A fingerprint identification algorithm based on Gabor filter is discussed, using the features of direction and frequency selectivity of Gabor filter.
利用Gabor滤波器的方向选择和频率选择特性，实现了一种基于Gabor滤波器的指纹识别算法。 - They can improve the frequency selectivity. They can provide better characteristics of the stopband. They can be used in the design of bandstop filters, and they can decrease the size of filter efficiently.
传输零点在滤波器的设计中占有非常重要的地位，它可以提高滤波器的频率选择性，可以提供良好的阻带特性，也可以用于带阻滤波器的设计，而且可以有效的缩小滤波器的体积。 - On the other hand, because of the frequency selectivity of human hearing, the effects of boundary conditions on sound quality are different from the one on physical sound.
另一方面，由于人类听觉对声音频率的选择接收特性，边界条件对结构辐射声响度的影响与对物理声的影响有很大不同。 - Gabor filter has two important characteristics which are orientation selectivity and frequency selectivity. Its performance in the image is the selectivity of character stroke width and direction.
Gabor滤波器有方向选择性和频率选择性两个重要特性，其在图像中的表现是对字符图像中字符笔画的宽度和方向具有选择性。 - Compared to traditional stepped-impedance dual-band bandpass filters, the proposed filters have two additional transmission zeros near the first passband, which improves frequency selectivity of the filter.
与传统阶跃阻抗双频带通滤波器相比，在第一通带两侧分别实现了一个额外的传输零点，提高了滤波器的频率选择性。 - Thirdly, through modeling the channel in frequency domain, the response in frequency domain of channel is obtained. Meanwhile, the frequency correlation of the path loss and the frequency selectivity of the channel are analyzed in detail.
第三，采用频域的电磁仿真算法对信道进行确定性建模，得出信道的频域响应，并且对路径损耗的频率相关性、信道的频率选择性进行了详细的分析。 - However, interactions between the acoustic effects of the parts are also evident, most notably, a synergism between two frequency-dependent effects ( cavity resonance and shadowing) to produce an even stronger frequency selectivity.
本文分析了鼻叶各部分相互作用所产生的影响，特别是两个与频率有关的影响（谐振腔和阴影）的共同作用产生了更强的频率选择性。 - The frequency selectivity of FSS is related to many factors, including the shape and size of cell, the distance between cells, and the direction and polarization of incident wave.
FSS的频率选择性与很多因素有关，例如，阵单元的形状、间距、排列方式，以及入射波的角度和极化特性等。 - The objective of this work is to design an integrated bandpass filter capable of operation in the intermediate-high frequency range with high linearity, tunable, low noise and high frequency selectivity. Transconductor ( Gm) is the most main unit of the whole Gm-C filter.
本次工作的目标是实现一个能够工作在中高频段拥有高线性度、低噪声、高频率选择的可调谐滤波器。跨导器（Gm）是整个Gm-C结构中的最基本的单元。 - In order to increase the frequency selectivity of the channel, this scheme introduces different cyclic delays into the OFDM symbols. In this approach, the frequency diversity gain and the BER performance of this scheme could be greatly improved.
该方案通过在多天线的OFDM调制信号中引入不同的循环延迟，增加了信道的频率选择性，提高了频率分集增益，能够很大程度的改善系统的误码率性能。 - It has the advantages of MIMO-OFDM technology: increase system channel capacity and data transfer rates significantly, against frequency selectivity fading and multi path fading.
它不但具有MIMO-OFDM技术的优点：能大幅提升系统的信道容量和数据传输速率，抗频率选择性衰落和多径衰落。 - The results shows the structure have good performance in frequency selectivity and basically consistent with the software simulation results.
仿真计算结果表明，电大尺寸FSS能够很好的反应出结构的频率选择特性，且与软件仿真所得无限大FSS的计算结果基本吻合。 - The fundamental research and the simulation result indicated that this corrective method can also obtain the high diversity gain and BER property under the frequency selectivity fading channel. Secondly, studied the differential space-time coding which circumvents the need for channel estimation.
理论研究和仿真结果均表明，该改进方法在频率选择性衰落信道下也能得到较高的分集增益和误比特率性能。其次研究了不需要信道估计的差分空时编译码方案。 - The frequency synthesizer is a key building block of radio frequency front-end for wireless communications and its performance determines the frequency selectivity of radio frequency receivers.
频率合成器是无线通信中射频前端的主要构件模块之一，性能直接决定射频接收机的频率选择性。 - So, the components with smaller size should be not only well in performance and frequency selectivity, but also low in insertion loss.
通信元器件不仅要具有良好可靠的性能、较低的插入损耗，还要求具有足够小的体积以及很高的频率选择性。 - We construct a new directional filter bank with flexible direction and frequency selectivity by cascading checkerboard-shaped filter pairs and the cosine modulated filter bank.
通过将二维棋盘形滤波器和二维可分离余弦调制滤波器组相结合，构造了具有灵活的方向和频率选择性的新的方向滤波器组。 - However, due to non-ideal communication environment, the frequency selectivity and fading of wireless channel restrains bit error rate performance, throughput, capacity and network flexibility of UWB systems.
然而，由于实际通信环境的不理想，无线信道的衰落效应限制了UWB系统的误码率性能、吞吐量、容量和网络灵活性。 - Then, we propose that an UWB antenna with high frequency selectivity can be constituted by integrated design of UWB filter and UWB antenna.
然后提出了通过对超宽带滤波器和超宽带天线进行集成设计的方法，构成具有良好滤波特性的新型超宽带天线。