phase mode

This paper introduces the phase modeling estimation method and smooth phase difference estimation method,presents the merits & demerits and application conditions of two methods,simulation test shows the effectiveness of two methods.信号的瞬时频率经常被用在非平稳信号处理中,为了在高斯白噪声背景下对线性调频信号(LFM)的瞬时频率进行准确估计,介绍了采用相位建模估计法和平滑相位差分估计法,分析了两者各自的优缺点和适用条件,仿真试验表明两种瞬时频率估计方法的有效性。Xgh汉语字典

Study on phase ambiguity resolution of QPSK digital demodulation;QPSK数字化解调相位模糊校正方法研究Xgh汉语字典

A novel multistage frequency offset estimation algorithm based on time-domain training sequence was proposed to avoid the conflict between estimation accuracy and estimation range The algorithom gradually approached through multiple stages and removed the phase ambiguity in every stage,so.该算法采用多步逐次逼近,在每一步估计中消除相位模糊,在不缩小估计范围的前提下不断提高估计精度;最后利用最佳线性无偏估计(BLUE)方法将各步估计值进行最佳合并,进一步提高估计精度。Xgh汉语字典

Algorithms,such as automatic frequency control(AFC),automatic gain control(AGC),phase-amplitude tracking(PAT),and phase ambiguity detecting (PAD),were jointly used in this scheme.综合应用自动频率控制(AFC)、自动增益控制(AGC)、相位/幅度跟踪、相位模糊检测等算法,在没有任何训练序列的情况下,能准确地恢复调制信号载波相位。Xgh汉语字典

Study of diffraction action of phase mask for optical fiber grating fabrication;制作光纤光栅用相位掩模的衍射行为研究Xgh汉语字典

Fabricating technology of fiber grating with phase masks;用相位掩模法制作光纤光栅的技术Xgh汉语字典

8% peak reflectivity is fabricated in B/Ge co doped fiber by 248 nm KrF excimer laser irradiated a phase mask.本文报道了以２４８ｎｍ的ＫｒＦ准分子激光为光源，用相位掩模技术在Ｂ／Ｇｅ双掺光纤上研制出反射率９８。Xgh汉语字典

Using only one optic element,the phase mask provides a robust and inherently stable method for reproducing fiber Bragg gratings,and reduces the complexity of the fiber grating fabrication system.由于相位模板法仅使用一个光学器件 ,因而减少了光纤光栅制造系统的复杂性 ,是光纤布拉格光栅写入法中最有前途、使用最广泛并且具有本征稳定性的一种方法 。Xgh汉语字典

A customized optimization model of phase plate for Extended Depth of Field (EDOF) is introduced based on the various requirements of different EDOF optical imaging system.从大景深成像系统实际所需要的景深、分辨率以及最小调制传递函数MTF响应值出发,本文建立了相位模板的个性化优化设计模型。Xgh汉语字典

The depth of field of standard optical incoherent imaging system can be extended by introducing a phase plate and the digital image restoration technique.在普通光学成像系统中引入相位模板和数字图像复原技术,可以增大系统的景深。Xgh汉语字典

Analysis in X-ray Pulsar Navigation Phase Ambiguity ResolutionX射线脉冲星导航中相位模糊度解算Xgh汉语字典

Microscopic Phase-Field Simulation of Antisite Defect Evolution of Al_3Li PhaseAl_3Li相反位缺陷演化的微观相场模拟Xgh汉语字典

Modular seat section. Attach to other modular seats and tables.模块式座位部分。与其他模块式座位和桌子相连。Xgh汉语字典

MICROSCOPIC PHASE-FIELD METHOD SIMULATION FOR THE IN SITU TRANSFORMATION OF Ll_0 PHASE AND Ll_2 PHASE STRUCTUREL1_0相和L1_2相结构原位转变的微观相场法模拟Xgh汉语字典

Modular 30 degree outside-wedge seat section. Attach to other modular seats and tables.外侧为 30 度的楔形模块式座位模件。与其它模块式座位和桌子相连。Xgh汉语字典

Modular 30 degree inside-wedge seat section. Attach to other modular seats and tables.内侧为 30 度的楔形模块式座位模件。与其它模块式座位和桌子相连。Xgh汉语字典

An Experimental Study on in Vitro Chemical-Shift Opposed-Phased Imaging Phantom;MRI化学位移同、反相位成像的体外实验模型研究Xgh汉语字典

Atomistic Study of Interaction between Screw Dislocation and Vacancy Cluster Platelet in α-Zirconiumα锆中螺形位错与空位盘的相互作用模拟Xgh汉语字典

Multiple models adaptive decoupling controller for nonminimum phase system using DBD technology非最小相位逐维定位多模型自适应解耦控制器Xgh汉语字典

Study on GPS-Galileo combined positioning based on relative positioning model基于相对定位模型的GPS-Galileo组合定位研究Xgh汉语字典

Adjusts horizontal phase/fine tunes computer analog image调节水平相位/细调计算机模拟图像Xgh汉语字典

Retrograde Counterpoint and Imitation and Other Pertinent Polyphonic Issues;逆行对位与逆行模仿及相关问题研究Xgh汉语字典

Chaotic Intensity and Phase Synchronization in Four Single-Mode Lasers;四台单模激光的混沌强度和位相同步Xgh汉语字典

Modes of Unstable Resonators with Phase Gaussian Variable Reflectivity Mirror;相位型高斯变反射率镜非稳腔的模式Xgh汉语字典

The Simulation of Phase Modulation in Azimuth for Suppressing Range Ambiguity in SARSAR方位调相抑制距离模糊的效果仿真Xgh汉语字典

Multi-phase image segmentation based on Chan-Vese model基于Chan-Vese模型的多相位图像分割Xgh汉语字典

Method of Fuzzy Control for Distribution Time of Multi-phase Traffic Signal多相位交通信号配时的模糊控制方法Xgh汉语字典

PANCHARATNAM PHASE IN DEFORMED JAYNES-CUMMINGS MODEL变形Jaynes-Cummings模型中的Pancharatnam相位Xgh汉语字典