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IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)

作者： Sun, Jwo-Shiun Pan, Guan-Pu Hsu, Ching-Yang Li, Tsung-Lin Natl Taipei Univ Technol Dept Elect Engn Taipei Taiwan

ISBN: (纸本)9781509012350

This paper proposes a contactless charging platform that allows portable devices being placed and charged. Using wound-wire structure and electro-magnetic induction, contactless power transmission can be achieved between platform and electronic devices. The charging platform adopts a microcontroller to select the appropriate array coils to be activated. The proposed array structure not only retains the original sensing area but also detects the secondary-side coil position to drive the primary-side coil and charge the load. The experimental results show that the secondary-side output voltage is 4.96V when the induction coil displacement is smaller than 2mm. The maximum output power and the maximum transmission efficiency are 3.43W and 64%, respectively.

关键词： Contactless charging platform electromagnetic induction array structure

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Design of a 16-Port Shared-Arm Dipole array for Ground-Penetrating Radar 8

Design of a 16-Port Shared-Arm Dipole Array for Ground-Penet...

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8th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)

作者： Kang, Woong Kim, Kangwook Korea Inst Geosci & Mineral Resources Explorat Geophys & Min Engn Dept Daejeon South Korea Gwangju Inst Sci & Technol Sch Mechatron Gwangju South Korea

ISBN: (纸本)9781479964956

A 16-port shared-arm dipole array (SADA) is designed and its performance is numerically verified. When constructing a physical array structure using a dipole element for imaging radar applications, spacing between elements should be less than a quarter wavelength for alias-free sampling in the aperture domain. The SADA in this paper is designed such that two antenna elements share a single dipole arm in order to make a dense array in the longitudinal direction. In designing the antenna, each arm is resistively loaded for pulse radiation as well as beam pattern with less distortion. The performance of the 16-port SADA with determined resistive loading is then numerically verified by radar imaging simulation.

关键词： ground penetrating radar dipole array antenna element PULSED IRRADIATION Radar applications beam mode digitally array structure quarter-wave dipole element longitudinal

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High Output Tactile Display Using Sma Thick Film Actuator array with Improved Thermal and Frequency Response 22

High Output Tactile Display Using Sma Thick Film Actuator Ar...

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22nd International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2023

作者： Saito, Ryo Amano, Haruto Mineta, Takashi Yamagata University Japan

ISBN: (纸本)9784886864352

This paper reports a fabrication and characterization of micro electro mechanical systems (MEMS) tactile display with meandering-shaped shape memory alloy (SMA) thick film actuator and SU-8 micro-pin array (1.5mm pitch, 5×5). The design of the SMA actuator was thermally and mechanically modified to improve sufficient amplitude to present vibratory stimuli to the fingertip. The tactile display device has been successfully fabricated, and amplitude of 22 μm was obtained which greatly exceeded the detection threshold of fingertip when driven at 20Hz at which mechanoreceptor in human skin has high sensitivity and high in-plane resolution for stimulus detection. The results of simple sensory examination showed that the device could clearly present vibrational stimulation to human fingertip at a driving frequency of 20 Hz even though the vibration of one micro-pin. © 2023 IEEJ.

关键词： array structure fingertip SMA film actuator Tactile display thermal response vibration stimulus

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Bit-level systolic imlementation of 1-D and 2-D discrete wavelet transform

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IEE PROCEEDINGS-CIRCUITS DEVICES AND SYSTEMS 2005年第1期152卷 25-32页

作者： Nayak, SS SKCG Coll Dept Phys Paralakhemundi 761200 Orissa India

The author presents a systolic array architecture for VLSI implementation of the one-dimensional discrete wavelet transform (DWT) which computes both high- and low-pass frequency coefficients in the same clock cycle. The architecture is simple, modular and cascadable for computation of one- or multidimensional DWTs. It needs 62% fewer registers than existing architecture, and the hardware utilisation of the proposed structure is very high. Two systolic architectures are presented for bit-level VLSI implementation of 1-D and 2-D DWT. Matrix transposition is avoided in the systolic architecture for bit-level VLSI implementation of 2-D DWTs.

关键词： clock cycle ARCHITECTURE Building construction matrix transpose discrete wavelet transform Very large scale integration proposed structure Systole array structure

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Some Upper Bounds and Exact Values on Linear Complexities Over FM of Sidelnikov Sequences for M=2 and 3

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IEEE TRANSACTIONS ON INFORMATION THEORY 2022年第8期68卷 5548-5560页

作者： Zeng, Min Luo, Yuan Hu, Guo-Sheng Song, Hong-Yeop Shanghai Tech Inst Elect & Informat Shanghai 201411 Peoples R China Shanghai Jiao Tong Univ Informat & Coding Theory Lab Dept Comp Sci & Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Dept Comp Sci & Engn AI Inst Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ MoE Key Lab Artificial Intelligence AI Inst Shanghai 200240 Peoples R China Yonsei Univ Sch Elect & Elect Engn Seoul 03722 South Korea

Sidelnikov sequences, a kind of cyclotomic sequences with many desired properties such as low correlation and variable alphabet sizes, can be employed to construct a polyphase sequence family that has many applications in high speed data communications. Recently, cyclotomic numbers have been used to investigate the linear complexity of Sidelnikov sequences, mainly about binary ones, although the limitation on the orders of the available cyclotomic numbers makes it difficult. This paper continues to study the linear complexity over F-M of M-ary Sidelnikov sequence of period q - 1 using Hasse derivative, which implies q = p(m), m >= 1 and M vertical bar( q - 1). The tth Hasse derivative formulas are presented in terms of cyclotomic numbers, and some upper bounds on the linear complexity for M = 2 and 3 are obtained only with some additional restrictions on q. Furthermore, concrete illustrations for several families of these sequences, such as q = 1 (mod 2) and q = 1 (mod 3), show these upper bounds are tight and reachable;especially for q = 2x3(lambda) + 1(1 <= lambda <= 20), the exact linear complexities over F-3 of the ternary Sidelnikov sequences are determined;and it turns out that all the linear complexities of the sequences considered are very close to their periods.

关键词： array structure cyclotomic numbers Hasse derivative linear complexity Sidelnikov sequences

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CONCURRENT FORMS OF SIGNAL-PROCESSING ALGORITHMS

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS 1989年第4期36卷 553-560页

作者： PORTER, WA Department of Electrical Engineering Louisiana State University Baton Rouge LA USA

Forms of algorithms that facilitate rapid processing on affiliated systolic arrays are examined. Classes of linear maps A: E/sup /n to E/sup /n that can be computed on p*p arrays at speed. O(p) where p= square root n are identified. The array architectures which provide the requisite computational support are proposed. The expansion of arbitrary linear maps in terms of the fast maps is considered. The results include a definitive method for minimal expansions and for best approximations of an a priori order. A detailed comparative example which illustrates the principles in question is also included.

关键词： maps Signal processing algorithms Systolic algorithms optimal approximation RAPID PROCESSING algorithms Linear array structure

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Flexible Sensor for Real-Time Monitoring of Motion Artifacts in Magnetic Resonance Imaging

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ACS SENSORS 2024年第5期9卷 2614-2621页

作者： Hu, Yiran Han, Chengcheng Huo, Xiaoqing Cao, Xiaole Chen, Yongyang Cao, Zhi Xu, Yong Tao, Li Wu, Zhiyi Chinese Acad Sci Beijing Inst Nanoenergy & Nanosyst Beijing 101400 Peoples R China Chongqing Med Univ Affiliated Hosp 1 Dept Radiol Chongqing 400016 Peoples R China Univ Chinese Acad Sci Coll Nanosci & Technol Beijing 100049 Peoples R China Bur Geol & Mineral Explorat & Dev Guizhou Prov Geol Brigade 105 Guiyang 550018 Peoples R China

In recent years, magnetic resonance imaging has been widely used in the medical field. During the scan, if the human body moves, then there will be motion artifacts on the scan image, which will interfere with the diagnosis and only be found after the end of the scan sequence, resulting in a waste of manpower and resources. However, there is a lack of technology that halts scanning once motion artifacts arise. Here, we designed a real-time monitoring sensor (RMS) to dynamically perceive the movement of the human body and to pause in time when the movement exceeds a certain amplitude. The sensor has an array structure that can accurately sense the position of the human body in real time. The selection of the RMS ensures that there is no additional interference with the scanning results. Based on this design, the RMS can achieve the monitoring function of motion artifact generation.

关键词： magnetic resonance imaging motion artifacts real-time sensing array structure smart medicalcare

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Analysis of Soft Failures in Low-Resistance Interconnect Vias Using Doubly Nesting arrays

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IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING 2014年第2期27卷 178-183页

作者： Shinkawata, Hiroki Sato, Shingo Tsuda, Atsushi Yoshizawa, Tomoaki Ohno, Takio Renesas Elect Corp Itami Hyogo 6640005 Japan Kansai Univ Suita Osaka 5648680 Japan Renesas Elect Corp Hitachinaka Ibaraki 3128504 Japan

An addressable test structure array for detecting soft failures in interconnect vias was developed. Resistive elements exhibiting abnormally high resistance are detected, while suppressing the measurement time, using a doubly nesting array structure. Applying this technique to the development of a 40-nm CMOS technology, a soft failure with about ten times larger than normal via resistance could be efficiently detected and located.

关键词： array structure back end of line interconnect via soft failure variation yield

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Direction of arrival tracking below the ambiguity threshold

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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS 2000年第2期36卷 354-363页

作者： Wax, M Tweg, R RAFAEL IL-31021 Haifa Israel

We present an algorithm for direction-of-arrival (DOA) tracking that allows operation below the ambiguity threshold of the direction-finding (DF) system. Using multiple target tracking techniques, the algorithm turns the most likely DOAs of each measurement into multiple potential tracks and then selects the true track as that with the maximum cumulative likelihood. The improvement offered by the algorithm, namely the extension of the ambiguity-free signal-to-noise ratio (SNR) domain, is demonstrated in several simulated experiments using several array structures, including a sparse array and a uniform linear array.

关键词： Time-delay estimation Maximum-likelihood Moving targets Multiple delay estimation multiples Angle of arrival multiple target tracking maximum likelihood tracking uniform linear arrays Direction of arrival estimation ambiguity array structure direction finding

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New approach for target locations in the presence of wall ambiguities

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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS 2006年第1期42卷 301-315页

作者： Wang, GY Amin, MG Zhang, YM Villanova Univ Coll Engn Ctr Adv Commun Villanova PA 19085 USA

A technique for target location estimation in through-the-wall radar imaging applications is presented. The algorithm corrects for the shifts in target positions due to ambiguities in the wall thickness and dielectric constant. We consider uniform walls and perform imaging using wideband beamforming, with the antennas placed against the wall. Behind-the-wall images are obtained using different structures of transmit and receive arrays. For each array structure, a trajectory of the shifts in the target locations is generated assuming different wall parameters. The target position is estimated as the intersection of the corresponding trajectories. The paper shows that for unknown wall thickness or dielectric constant, the point of intersection is the true target position. In the case when both parameters are unknown, the estimated target location is in close proximity to the target true position. It is demonstrated that the performance of the proposed technique is rather insensitive to the target location behind the wail and to various array structures.

关键词： radar imaging antennas array structure dielectric constant target location estimation target positions through-the-wall radar imaging wall thickness wideband beamforming wall WALL THICKNESS dielectric properties Radar imaging Dielectric constant array structure

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