2006 IEEE International Frequency Control Symposium and Exposition最新文献_第10页

Tutorial Session 3B - Passive Atomic Frequency Standards 辅导课3B -被动原子频率标准

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275332

W. Riley

引用次数: 0

Modified Lee Plate Equations for the Vibration Analysis of Piezoelectric Plates with Consideration of Stiffness and Mass of Electrodes 考虑电极刚度和质量的压电板振动分析的修正Lee板方程

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275479

Ji Wang, Guojun Chen, J. Du

{"title":"Modified Lee Plate Equations for the Vibration Analysis of Piezoelectric Plates with Consideration of Stiffness and Mass of Electrodes","authors":"Ji Wang, Guojun Chen, J. Du","doi":"10.1109/FREQ.2006.275479","DOIUrl":"https://doi.org/10.1109/FREQ.2006.275479","url":null,"abstract":"Lee plate equations for high frequency vibrations of piezoelectric plates have been established and improved over the decades with the sole objective to obtain the accurate prediction of frequency and mode shapes to aid crystal resonator design. The latest improvement includes extra terms related to derivatives of the flexural displacement to adjust the accuracy and for the consideration of the electrode for practical applications. As part of the efforts to make the equations more practical for resonator design with the improved of frequency accuracy and consideration of electrodes, the authors derived Lee plate equations for electroded plates by changing the integration limits in the dimension reduction procedure to signify the dominant role of the crystal plate. As a result, the equations are modified for the inclusion of the electrode effects. To improve the accuracy in the vicinity of thickness-shear vibration frequency of electroded plates, we modified the density terms in plate equations to reflect the contribution of both electrode stiffness and density, which makes the frequency more accurate for commonly used electrode materials","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122104947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Interim report on the round robin result of phase jitter measurement in crystal oscillators and SAW oscillators 晶体振荡器和SAW振荡器相位抖动测量轮循结果的中期报告

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275390

M. Koyama, T. Hosoda, T. Uchiyama

引用次数: 0

A New Algorithm of Detecting and Correction Cycle Slips in Dual-Frequency GPS 一种新的双频GPS周期跳检测与校正算法

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275459

Li Gun, Hu Yong-hui, Zhou Wei

{"title":"A New Algorithm of Detecting and Correction Cycle Slips in Dual-Frequency GPS","authors":"Li Gun, Hu Yong-hui, Zhou Wei","doi":"10.1109/FREQ.2006.275459","DOIUrl":"https://doi.org/10.1109/FREQ.2006.275459","url":null,"abstract":"Detecting and reconstructing the cycle slip are very important in GPS carrier phase time transfer (GPS CPTT). Many kinds of algorithms have been developed in the past several years especially using GIPSY OASIS software developed by JPL (Jet Propulsion Laboratory) for estimating ambiguity resolution and solving cycle slip problem. NTSC has installed one geodetic like dual frequency Ashtech Z12T receiver for GPS CPTT investigation. The GPS carrier phase time transfer data have been obtained using this receiver at NTSC (National time service center, Chinese Academy of Sciences). In this paper, a new algorithm of TWO STEP method for detecting outliers and cycle slips in dual-frequency GPS is presented. Firstly, using Kalman filter in the model of the 3rd order polynomial for a larger cycle slips, such as larger than 2cycles. Secondly, estimating and reconstruction small cycle slips(less than 1) by using Daubechies wavelet. The details of algorithm are given. The processing result using the algorithm is presented. It is applicable to the carrier phase measurement with one sample per 30 second. The calculated results using data of GPS on NTSC show that the algorithm is so efficiency that it can accurately find the small cycle slip less than one cycle","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129633279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Study of an Optimal Algorithm for Combing TWSTFT and GPS CV Comparisons TWSTFT与GPS CV比较的最优算法研究

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275463

Li Gun, Huang Hui, Zhong Chong-xia, Zhou Wei

{"title":"Study of an Optimal Algorithm for Combing TWSTFT and GPS CV Comparisons","authors":"Li Gun, Huang Hui, Zhong Chong-xia, Zhou Wei","doi":"10.1109/FREQ.2006.275463","DOIUrl":"https://doi.org/10.1109/FREQ.2006.275463","url":null,"abstract":"Two-way satellite time and frequency transfer (TWSTFT) and GPS C/A code based common view (GPS CV) are the two primary methods for international time and frequency transfer. TWSTFT technique has been made significant improvement in the last several years, and demonstrated to show a higher precision of T&F transfer than that of GPS CV. So it has been utilized for in the computation of TAI (international atomic time) and the GPS CV link is regarded as a back up if the links have both TWSTFT and GPS CV time transfer links. Actually, the TWSTFT is unavailable frequently for some unknown reasons or failure of instrument. More important, in some links, the comparison result of GPS CV has valuable information in the calculation of TAI and UTC (coordinated universal time). Considering these two cases, we have been used GPS CV C/A code and TWSTFT observations in attempt to form a more stable and reliable composite time transfer links. In this study we have focused on the unavailability when the system has malfunction or abnormality, in this case, the GPS CV data will be used in TAI computation which will cause a systematic error that should be deduct in some links. Finally, to avoid the above mentioned shortcomings, a new optimal algorithm for combining the two types time transfer data is given, the details of the optimal algorithm has been presented in this paper. A more stable and reliable time comparison result has been achieved in time comparison between some national time laboratories. The UTC(USNO)-UTC(PTB) and the UTC(ROA)-UTC(PTB) are given as a example","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130254939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Bandwidth Improvement Methods In Acoustically-Coupled Thin Film BAW Devices 声耦合薄膜BAW器件的带宽改进方法

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275371

V. Kulkarni, K. Prasad, B. Barber

引用次数: 4

Investigation of an Optimum Sampling Interval for a Local Clock TIE Model with an Unbiased FIR Filtering Algorithm 基于无偏FIR滤波算法的本地时钟TIE模型的最佳采样间隔研究

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275455

J. Munoz-Diaz, Y. Shmaliy, L. Arceo-Miquel, O. Ibarra-Manzano

引用次数: 10

The Properties of Time and Phase Variances in the Presence of Power Law Noise for Various Systems 各种系统在幂律噪声存在下的时间和相位变化特性

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275482

V. Reinhardt

{"title":"The Properties of Time and Phase Variances in the Presence of Power Law Noise for Various Systems","authors":"V. Reinhardt","doi":"10.1109/FREQ.2006.275482","DOIUrl":"https://doi.org/10.1109/FREQ.2006.275482","url":null,"abstract":"This paper discusses the behavior of sample, standard, bandpass, and Allan variances of the time and phase error in the presence of negative power law or fbeta noise for a variety of systems. These systems include those in the digital, communications, signal processing, radar, ranging, and time transfer areas. A theory is presented which spectrally defines these variances by explicitly incorporating a system phase response function Hs(f) into the spectral integral. For many of the above systems, Hs(f) is shown to contain highpass as well as lowpass filtering properties, and these highpass properties, when present, are shown to enable both the sample and standard variances, as well as Allan variances, to be used in the presence of fbeta noise for beta>-4. It is also shown that the sample variance defined in this way can be used to justify the heuristic low and high frequency cut-offs that appear in the spectral definition of the bandpass variance (also known as the jitter). Hs(f) is further shown to fall into four general classes for the purposes of characterizing variance behavior. These classes we call: digital sampling, delay, delay with averaging, and PLL. The final part of the paper consists of a detailed discussion of the properties of these variances in the presence of negative power law noise for the above systems, organized by class of Hs(f)","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122170186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A Low Phase Noise Microwave Sapphire Loop Oscillator 一种低相位噪声微波蓝宝石环振荡器

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275501

D. Green, C. McNeilage, J. Searls

引用次数: 11

The Impact of Finite Element Analysis on the Design of Quartz Resonators 有限元分析对石英谐振器设计的影响

2006 IEEE International Frequency Control Symposium and Exposition Pub Date : 2006-06-01 DOI: 10.1109/FREQ.2006.275345

Y. Yong, M.S. Patel, S. Srivastava, M. Tanaka, T. Imai

引用次数: 9