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Research on High-Precision and Low-Power Quartz MEMS Gyroscope Signal Demodulation Circuit Based on AFE and FPGA Fusion

Research on High-Precision and Low-Power Quartz MEMS Gyrosco...

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2023 International Conference on Sensing, Measurement and Data Analytics in the Era of Artificial Intelligence, ICSMD 2023

作者： Li, Jiawei Sun, Xinyue Shi, Yuchen Ren, Yichen Zhao, Ergang Yue, Zhao College of Electronic Information and Optical Engineering Nankai University Tianjin China Smart Sensing Interdisciplinary Science Center of Nankai University Nankai University Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin China

ISBN: (纸本)9798350318012

Mainstream quartz MEMS gyroscope signal demodulation methods are coherent demodulation methods, and the sensitivity of phase limits their accuracy improvement. In order to improve the accuracy of quartz MEMS gyroscope signal demodulation and achieve low-power gyroscope signal demodulation, a high-precision and low-power quartz MEMS gyroscope signal demodulation circuit based on AFE and FPGA fusion is proposed: The FPGA circuit uses simplified non-phase-sensitive amplitude discrimination algorithm and second-order IIR low-pass filter to build demodulation circuit;The AFE circuit uses low-power single point DFT algorithm based on CORDIC algorithm for demodulation. Then performs dual circuit fusion to improve demodulation accuracy. The high-precision quartz MEMS gyroscope signal demodulation circuit is achieved with a scale factor of 6.4 mV/°/s, relative error of 1.14%, and data variance of 0.39. By detecting the rate of change in angular velocity, it switches to a single circuit to achieve low-power signal demodulation goals, the minimum operating power consumption is about 79mW. © 2023 IEEE.

关键词： Demodulation

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Long-term ultra-precision phase synchronization technique for locking the repetition rate of OFCs based on FLOM-PD

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Optoelectronics Letters 2022年第12期18卷 712-716页

作者： ZHOU Weifeng HAO Shijie CHEN Xing ZHANG Wanpeng YUE Zongjie WU Hong College of Electronic Information and Optical Engineering Nankai UniversityTianjin300350China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Nankai UniversityTianjin300350China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing100876China Engineering Research Center of Thin Film Optoelectronics Technology Nankai UniversityTianjin300350China

Long-term ultra-precision synchronization between optical frequency combs(OFCs) and microwave oscillators is important for various fields, including scientific observation, smart grid, positioning and navigation, etc. Here, a phase-locked loop system based on fiber loop optical-microwave phase detector(FLOM-PD) is proposed to realize the synchronization of the repetition rate of OFCs and rubidium atomic clocks. Firstly, the scheme and locking process of the system are elaborated, then the mathematical model of the system is established, and the feasibility of the scheme is proved by theoretical analysis and experimental verification. After synchronization, the instability of the system reaches 8.69×10^(-12)at 1 s and 2.94×10^(-13)at 1 000 s, indicating that the phase synchronization system can achieve ultra-precision and stability of OFCs repetition rate.

关键词： synchronization repetition phase

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Adaptive space-time diversity slotted ALOHA over 2 × m MIMO multiaccess channels

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IEEE Transactions on Vehicular technology 2009年第7期58卷 3271-3282页

作者： Guo, Haiyou Hu, Honglin Zhang, Yan Chen, Hsiao-Hwa Key Laboratory of Wireless Sensor Network and Communications Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Shanghai Research Center for Wireless Communications Shanghai 200335 China Simula Research Laboratory 1325 Lysaker Norway Department of Engineering Science National Cheng Kung University Tainan 70101 Taiwan

This paper proposes a new random-access protocol over 2 × M multiple-input-multiple-output (MIMO) multiaccess channels, namely, adaptive space-time diversity slotted ALOHA (ASTDSA), to address the issues on collision diversity while maintaining implementation simplicity. The proposed scheme exploits the advantages of both V-BLAST and Alamouti space-time block coding (STBC). In particular, it adaptively only transmits space-time-coded copies to remediable collisions. The coded replicas contain the same information as the packets involved in collisions and are immediately sent after a colliding slot. Combining the packets received in two consecutive slots, the Alamouti STBC scheme can be reconstructed to linearly resolve the collision without sacrificing the space-time diversity gain. An embedded Markov chain is developed to derive performance metrics with respect to throughput, diversity gain, delay, and stability. The tradeoff among those metrics is investigated. The results demonstrate that ASTDSA significantly outperforms the existing schemes, and simulations are used to validate the analytical model. © 2009 IEEE.

关键词： MIMO systems

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A star selection strategy based on MDS and fast convex hull algorithm in COSPAS-SARSAT system 4

A star selection strategy based on MDS and fast convex hull ...

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2024 4th International Conference on Computer, Remote Sensing and Aerospace, CRSA 2024

作者： Zhu, Xun Zhao, Laiding Zhang, Gengxin College of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing210003 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China Telecommunication and Network National Engineering Research Center Nanjing University of Posts and Telecommunications Nanjing210003 China

The space segment of the current COSPAS-SARSAT system is mainly supported by the Galileo system, and the positioning technology used is generally three-star time-difference positioning. Most of the antennas equipped in the Mission Control Centre (MCC) are not omnidirectional. In the case of Source of Search and Rescue (SAR) in a heavily shaded environment, it is necessary to use the different orbit time-sharing single satellite geolocations using TDOA, and the time-sharing will generate more satellite position data. In order to achieve the higher positioning accuracy of the solution, it is necessary to select the appropriate time and optimal geometrical distribution from the satellite positions. In this paper, we propose a satellite selection strategy based on Multiple Dimensional scaling (MDS) data degradation and a fast convex hull algorithm. The three-dimensional satellite data are downscaled to two-dimensional while maintaining their relative positional relationships, and the two-dimensional convex hull algorithm is used for Geometric Dilution of Precision (GDOP) minimum search star selection. By simulating the satellite position data in different orbits and time-sharing to complete the localization solution, the results show that compared with the traditional satellite selection method, the satellite selection strategy proposed in this paper is able to achieve better localization accuracy in a shorter period of time. © Published under licence by IOP Publishing Ltd.

关键词： Stars

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A comparative study of quantum evolutionary algorithm and particle swarm optimization for numerical optimization problems

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content technology and its Applications 2011年第7期5卷 182-190页

作者： Ma, Tinghuai Yan, Qiaoqiao Xuan, Wenxia Wang, Bin Jiangsu Engineering Center of Network Monitoring School of Computer and Software Nanjing University of Information Science and Technology China National Meteorological Information Centre Chinese Meteorological Administration China

Quantum evolutionary algorithm (QEA) and particle swarm optimization (PSO) are two different types of intelligent optimization algorithm. Many efforts on these two algorithms have progressed actively in recent years. In this paper, six typical and complex benchmark testing functions are applied to verify their abilities for dealing with numerical optimization problems. The results show that QEA has better global search capability, which is manifested very outstandingly for the multi peak function optimization, but its convergence speed is slower. Contrarily, PSO has faster convergence speed, and it can solve certain optimization problem rapidly, especially for single peak functions.

关键词： Particle swarm optimization (PSO)

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Incremental Learning Algorithm Based on Graph Regularized Non-negative Matrix Factorization with Sparseness Constraints 4

Incremental Learning Algorithm Based on Graph Regularized No...

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4th International Conference on Artificial Intelligence and Big Data, ICAIBD 2021

作者： Wang, Jintao Zhang, Meng Hu, Xusheng Ni, Tianwei Key Lab. of Unmanned Aer. Vehicle Devmt. and Data Application of Anhui Higher Education Institutes Maanshan Wireless Sensor Network and Intelligent Perception Engineering Technology Research Center Wanjiang University of Technology Maanshan China Wanjiang University of Technology Maanshan China

ISBN: (纸本)9780738131702

Focused on the issues that the sparseness of the data obtained after factorization is reduced and with the increasing of training samples, the computing scale increases rapidly, an incremental learning algorithm based on graph regularized non-negative matrix factorization with sparseness constraints was proposed. It not only considers the geometric structure in the data representation, but also introduces sparseness constraint to coefficient matrix and combines them with incremental learning. Using the results of previous factorization involved in iterative computation with sparseness constraints and graph regularized, the cost of the computation is reduced and the sparseness of data after factorization is highly improved. Experiments on both ORL and PIE face recognition databases demonstrate the effectiveness of the proposed method. © 2021 IEEE.

关键词： Non-negative matrix factorization

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Design of a low power charge pump circuit for phase-locked loops

Design of a low power charge pump circuit for phase-locked l...

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2012 4th International High Speed Intelligent Communication Forum, HSIC 2012

作者： Xu, Huili Li, Zhiqun Institute of RF-and OE-ICs Southeast University China Engineering Research Center of RF-ICs and RF-Systems Ministry of Education Southeast University China Jiangsu Provincial Key Laboratory of Sensor Network Technology Wuxi 214135 China

ISBN: (纸本)9781467306751

In this paper, the design of a charge pump circuit suitable for lower power PLL-based frequency synthesizer is presented. The charge pump circuit was designed in 0.18m CMOS process. The proposed charge pump circuit improves current matching in a wide output voltage range by applying a wide input ranged operational amplifier. The percentage error of current mismatch for the output range from 0.3V to 1.7V is less than 0.005%. The power consumption of the proposed charge pump circuit is around 0.56mW at a supply voltage of 1.8V. © 2012 IEEE.

关键词： Charge pump circuits

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A 7-bit 26-MS/s SAR ADC in 0.18 m CMOS process for WSN application

A 7-bit 26-MS/s SAR ADC in 0.18 m CMOS process for WSN appli...

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2012 4th International High Speed Intelligent Communication Forum, HSIC 2012

作者： Yang, Ting Li, Zhiqun Institute of RF-and OE-ICs Southeast University China Engineering Research Center of RF-ICs and RF-Systems Ministry of Education Southeast University China Jiangsu Provincial Key Laboratory of Sensor Network Technology Wuxi 214135 China

ISBN: (纸本)9781467306751

A 7-bit 26MS/s SAR (successive approximation register) ADC is presented in this paper for the application of ZigBee receiver. Compared to the conventional method, the set-and-down method reduces the average switching energy by around 80%. Dynamic comparator is chosen to diminish the signal-dependent offset caused by the non-fixed input common-mode voltage. A prototype ADC was implemented in a CMOS 0.18-m technology. The ADC consumes 1.66 mW at 26MS/s under a 1.8-V supply. The post-simulation shows that SNDR and SFDR are 43.11dB and 57.49dB, when sampling 3.19921875 MHz sinusoid input signal at 26MHz sampling clock. © 2012 IEEE.

关键词： CMOS integrated circuits

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A 1.8-V 1.8 GHz LC VCO for WSN application

A 1.8-V 1.8 GHz LC VCO for WSN application

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2012 4th International High Speed Intelligent Communication Forum, HSIC 2012

作者： Zhao, Sheng Li, Zhiqun Institute of RF-and OE-ICs Southeast University China Engineering Research Center of RF-ICs and RF-Systems Ministry of Education Southeast University China Jiangsu Provincial Key Laboratory of Sensor Network Technology Wuxi 214135 China

ISBN: (纸本)9781467306751

A 1.8 GHz LC VCO in 1.8-V supply is presented. The VCO achieves low power consumption by optimum selection of inductance in the L-C tank. To increase the tuning range, a three-bit switching capacitor array is used for digital switched tuning. Designed in 0.18m RF CMOS technology, the proposed VCO achieves a phase noise of 126.2dBc/Hz at 1MHz offset and consumes 1.38mA core current at 1.8-V voltage supply. © 2012 IEEE.

关键词： Variable frequency oscillators

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A low power 0.3-3.8 GHz low-noise mixer with noise cancellation

A low power 0.3-3.8 GHz low-noise mixer with noise cancellat...

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2012 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Wireless technology and Applications, IMWS 2012

作者： Shen, Changguo Li, Zhiqun Institute of RF- and OE-ICs Southeast University China Engineering Research Center of RF-ICs and RF-Systems Ministry of Education Southeast University China Jiangsu Provincial Key Laboratory of Sensor Network Technology Wuxi 214135 China

ISBN: (纸本)9781467309028

This paper shows a low power low-noise mixer in RFCMOS 0.18μm technology that operates between 0.3-3.8GHz. The low power mixer has a Gilbert cell configuration which employs low-noise transconductors designed using the noise-cancelling technique. And the low-noise amplifier designs use the current-reused topology to reduce power consumption and employ a capacitive cross-coupled (CCC) gm-boosting to improve noise performance. This merged front-end achieves 11-17dB power conversion gain, a flat SSB noise figure of 7.3-11dB with IF 2MHz over the whole working range. It only consumes 1.69mA current from a 1.8V supply and its active area occupies only 0.04mm 2. © 2012 IEEE.

关键词： Noise figure

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