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Articles 1 - 30 of 52
Full-Text Articles in Engineering
Distribution Of Bit Patterns In Binary Sequence Generated Over Sub Extension Field, Md. Arshad Ali, Yuta Kodera, Yasuyuki Nogami, Satoshi Uehara, Robert Morelos-Zaragoza
Distribution Of Bit Patterns In Binary Sequence Generated Over Sub Extension Field, Md. Arshad Ali, Yuta Kodera, Yasuyuki Nogami, Satoshi Uehara, Robert Morelos-Zaragoza
Faculty Publications
The distribution of bit patterns is an important measure to check the randomness of a sequence. The authors of this paper observed this crucial property in a binary sequence which generated by using a primitive polynomial, trace function, and Legendre symbol defined over the sub extension field. The authors create a new dimension in the sequence generation research area by considering the sub extension field, whereas all our previous works are focused in the prime field. In terms of the distribution of bit patterns property, this research work has notable outcomes more specifically the binary sequence (defined over the sub …
Development Of A Placement Exam To Increase Student Success In A Junior Level Circuits And Systems Class, David Parent
Development Of A Placement Exam To Increase Student Success In A Junior Level Circuits And Systems Class, David Parent
Faculty Publications
In this work, which is intended to be a Full Paper in the Innovative Practice Category, the implementation of an improved placement exam that increased the pass rate in a junior level systems course in the author’s electrical engineering department by 15% is presented. For almost 30 years the author’s EE department has used a face to face exam to place students in a junior level circuits and systems course or into a review workshop. The details of the exam and suggestions about future use in conjunction MyOpenMath analytics to increase student success are also given.
Examination The Impact Of Various Factors On Student Success In An Introduction To Circuit Analysis Course, David Parent
Examination The Impact Of Various Factors On Student Success In An Introduction To Circuit Analysis Course, David Parent
Faculty Publications
In this work in progress, several models to predict student success in a sophomore introduction to circuit analysis class were created based on prior grade point average, grade in a pre-requisite physics class, the semester the pre-requisite physics class was taken, the number of units a student was taking, the number of times a student repeated the circuits class, and the number of times a student repeated any class prior to enrollment. While all models were statistically significant, the model that included prior GPA and the grade in a pre-requisite physics was the most significant for the data collection effort. …
Integration Of An Electrical Engineering Capstone Course With Social Justice And Global Studies, David Parent, Patricia Backer
Integration Of An Electrical Engineering Capstone Course With Social Justice And Global Studies, David Parent, Patricia Backer
Faculty Publications
A four course package (six units total) consisting of two general education (GE) classes and two electrical engineering capstone classes that are taught in a highly integrated manner, that not only meets university GE requirements, but also meets the new ABET criteria in which the need to address a societal need is embedded with design criteria. The prompts for the new integrated GE/capstone Assessment results are also presented, along with methods to increase student motivation for studying GE.
A Neuromorphic Quadratic, Integrate, And Fire Silicon Neuron With Adaptive Gain, David Parent, Eric Basham
A Neuromorphic Quadratic, Integrate, And Fire Silicon Neuron With Adaptive Gain, David Parent, Eric Basham
Faculty Publications
An integrated circuit implementation of a silicon neuron was designed, manufactured, and tested. The circuit was designed using the Quadratic, Integrate, and Fire (QIF) neuron model in 0.5 µm silicon technology. The neuron implementation was optimized for low current consumption, drawing only 1.56 mA per QIF circuit and utilized hysteretic reset, non-inverting integrator, and voltage-squarer circuits. The final area of each circuit in silicon was 268 µm height × 400 µm width. This design is the first IC of its kind for this neuron model and is successfully able to output true spiking that follows the behaviors of bistability, monotonic, …
Spin-Imbalance In A 2d Fermi-Hubbard System, Peter Brown, Debayan Mitra, Elmer Guardado-Sanchez, Peter Schauß, Stanimir Kondov, Ehsan Khatami, Thereza Paiva, Nandini Trivedi, David Huse, Waseem Bakr
Spin-Imbalance In A 2d Fermi-Hubbard System, Peter Brown, Debayan Mitra, Elmer Guardado-Sanchez, Peter Schauß, Stanimir Kondov, Ehsan Khatami, Thereza Paiva, Nandini Trivedi, David Huse, Waseem Bakr
Faculty Publications
The interplay of strong interactions and magnetic fields gives rise to unusual forms of superconductivity and magnetism in quantum many-body systems. Here, we present an experimental study of the two-dimensional Fermi-Hubbard model—a paradigm for strongly correlated fermions on a lattice—in the presence of a Zeeman field and varying doping. Using site-resolved measurements, we revealed anisotropic antiferromagnetic correlations, a precursor to long-range canted order. We observed nonmonotonic behavior of the local polarization with doping for strong interactions, which we attribute to the evolution from an antiferromagnetic insulator to a metallic phase. Our results pave the way to experimentally mapping the low-temperature …
Multi-Valued Sequences Generated By Power Residue Symbols Over Odd Characteristic Fields, Begum Nasima, Yasuyuki Nogami, Satoshi Uehara, Robert Morelos-Zaragoza
Multi-Valued Sequences Generated By Power Residue Symbols Over Odd Characteristic Fields, Begum Nasima, Yasuyuki Nogami, Satoshi Uehara, Robert Morelos-Zaragoza
Faculty Publications
This paper proposes a new approach for generating pseudo random multi-valued (including binary-valued) sequences. The approach uses a primitive polynomial over an odd characteristic prime field $\f{p}$, where p is an odd prime number. Then, for the maximum length sequence of vectors generated by the primitive polynomial, the trace function is used for mapping these vectors to scalars as elements in the prime field. Power residue symbol (Legendre symbol in binary case) is applied to translate the scalars to k-value scalars, where k is a prime factor of p-1. Finally, a pseudo random k-value sequence is obtained. Some important properties …
Reduced Haemodynamic Coupling And Exercise Are Associated With Vascular Stiffening In Pulmonary Arterial Hypertension, Alessandro Bellofiore, Eric Dinges, Robert Naeije, Hamorabi Mkrdichian, Lauren Beussink-Nelson, Melissa Bailey, Michael Cuttica, Ranya Sweis, James Runo, Jon Keevil, Christopher Francois, Sanjiv Shah, Naomi Chesler
Reduced Haemodynamic Coupling And Exercise Are Associated With Vascular Stiffening In Pulmonary Arterial Hypertension, Alessandro Bellofiore, Eric Dinges, Robert Naeije, Hamorabi Mkrdichian, Lauren Beussink-Nelson, Melissa Bailey, Michael Cuttica, Ranya Sweis, James Runo, Jon Keevil, Christopher Francois, Sanjiv Shah, Naomi Chesler
Faculty Publications
Inadequate right ventricular (RV) and pulmonary arterial (PA) functional responses to exercise are important yet poorly understood features of pulmonary arterial hypertension (PAH). This study combined invasive catheterisation with echocardiography to assess RV afterload, RV function and ventricular–vascular coupling in subjects with PAH.
The Influence Of Personality And Ability On Undergraduate Teamwork And Team Performance, Jinny Rhee, David W. Parent, Anuradha Basu
The Influence Of Personality And Ability On Undergraduate Teamwork And Team Performance, Jinny Rhee, David W. Parent, Anuradha Basu
Faculty Publications
The ability to work effectively on a team is highly valued by employers, and collaboration among students can lead to intrinsic motivation, increased persistence, and greater transferability of skills. Moreover, innovation often arises from multidisciplinary teamwork. The influence of personality and ability on undergraduate teamwork and performance is not comprehensively understood. An investigation was undertaken to explore correlations between team outcomes, personality measures and ability in an undergraduate population. Team outcomes included various self-, peer- and instructor ratings of skills, performance, and experience. Personality measures and ability involved the Five-Factor Model personality traits and GPA. Personality, GPA, and teamwork survey …
Power Spectral Densities Of Baseband Signals In Epc Class-1 Gen-2 Uhf Rfid Systems, Robert H. Morelos-Zaragoza
Power Spectral Densities Of Baseband Signals In Epc Class-1 Gen-2 Uhf Rfid Systems, Robert H. Morelos-Zaragoza
Faculty Publications
The power spectral densities (PSD) of baseband signals in EPC Class-1 Gen-2 UHF RFID systems are shown. PSD are obtained using Matlab as the Fourier transform (via the FFT algorithm) of the autocorrelation function of random pulse sequences. The PSD of PIE, FM0 and Miller subcarrier for M=2, 4 and 8 are shown for both unipolar (for 100% ASK or OOK modulation) and polar (PSK modulation) waveforms.
Design Optimization Of Transistors Used For Neural Recording, E J. Basham, David W. Parent
Design Optimization Of Transistors Used For Neural Recording, E J. Basham, David W. Parent
Faculty Publications
Neurons cultured directly over open-gate field-effect transistors result in a hybrid device, the neuron-FET. Neuron-FET amplifier circuits reported in the literature employ the neuron-FET transducer as a current-mode device in conjunction with a transimpedance amplifier. In this configuration, the transducer does not provide any signal gain, and characterization of the transducer out of the amplification circuit is required. Furthermore, the circuit requires a complex biasing scheme that must be retuned to compensate for drift. Here we present an alternative strategy based on the design approach to optimize a single-stage common-source amplifier design. The design approach facilitates in circuit characterization of …
Influence Of Personality On A Senior Project Combining Innovation And Entrepreneurship, Jinny Rhee, David W. Parent, Clifton M. Oyamot
Influence Of Personality On A Senior Project Combining Innovation And Entrepreneurship, Jinny Rhee, David W. Parent, Clifton M. Oyamot
Faculty Publications
No abstract provided.
Error Correcting Codes For Cooperative Broadcasting, Robert H. Morelos-Zaragoza
Error Correcting Codes For Cooperative Broadcasting, Robert H. Morelos-Zaragoza
Faculty Publications
This talk considers the design and implementation of error correcting codes for cooperative broadcasting in wireless networks. Focus is on the case of two cooperating sources transmitting two classes of information to a single receiver. This case was first introduced in the seminal work of Bergmans and Cover and referred to as "over the air mixing". Two levels of protection are provided using two low-density parity-check (LDPC) codes combined using Plotkin's |u|u+v|-construction. Expressions are derived for the bit metrics used in iterative decoding for two-level codes combined with BPSK, QPSK and 4-PAM modulations. Several examples of codes and their performance …
On Iterative Decoding Of Two-Level Superposition Codes For Cooperative Broadcasting Based On Qpsk And 4-Pam Constellations, Robert H. Morelos-Zaragoza
On Iterative Decoding Of Two-Level Superposition Codes For Cooperative Broadcasting Based On Qpsk And 4-Pam Constellations, Robert H. Morelos-Zaragoza
Faculty Publications
This paper considers iterative decoding of two-level superposition codes used in cooperative broadcasting over wireless networks. The coding scheme consists of two low-density parity-check (LDPC) codes combined using Plotkin's |u|u + v|-construction and provides two levels of error protection. Coding for cooperative broadcasting differs from conventional single-source broadcast coding. Instead of binary addition of subcode codewords performed by a single-source encoder, in superposition coding two modulated subcode sequences, produced by two coordinated and independent sources, are combined at the antenna of the receiver. Expressions are derived for the bit metrics, or log-likelihood ratio values, used by an iterative decoder for …
A Trade-Off Analysis Of Energy Detectors And Partitioned Search For Primary Detection, Birsen Sirkeci-Mergen, Vishal Sawant, Robert H. Morelos-Zaragoza
A Trade-Off Analysis Of Energy Detectors And Partitioned Search For Primary Detection, Birsen Sirkeci-Mergen, Vishal Sawant, Robert H. Morelos-Zaragoza
Faculty Publications
Cognitive radios aim to coexist in the unused spectrum bands which are licensed to primary users without harming the primary transmission/reception. For a cognitive radio, it is important to detect the band in which the primary is operating as fast as possible and with high reliability in order to adapt its transmission. In this work, we propose P-partitioning method in combination with energy detectors for the search of the band that the primary user is operating. In the P-partitioning method, the spectrum bands are categorized into P groups and the group that the primary band belongs to is detected in …
An Adaptive Adjacent Channel Interference Cancellation Technique, Robert H. Morelos-Zaragoza, Shobha Kuruba
An Adaptive Adjacent Channel Interference Cancellation Technique, Robert H. Morelos-Zaragoza, Shobha Kuruba
Faculty Publications
In this paper, an adaptive adjacent channel interference (ACI) technique is proposed. Results for BPSK modulation with rectangular and square-root raised-cosine pulse shaping, under AWGN conditions, are obtained showing the proposed method to be effective in improving performance under high levels of interference. Basically, the idea is to send pilot signals and then to use them in estimating the amount of ACI in the frequency domain. The estimated spectral error is used to modify tap weights of an adaptive frequency-domain filter. Our simulation results reported suggest that ACI can be effectively reduced with the proposed technique. At the system level, …
Microfluidic Devices For Terahertz Spectroscopy Of Biomolecules, P. A. George, W. Hui, F. Rana, Benjamin G. Hawkins, A. E. Smith, B. J. Kirby
Microfluidic Devices For Terahertz Spectroscopy Of Biomolecules, P. A. George, W. Hui, F. Rana, Benjamin G. Hawkins, A. E. Smith, B. J. Kirby
Faculty Publications
We demonstrate microfluidic devices for terahertz spectroscopy of biomolecules in aqueous solutions. The devices are fabricated out of a plastic material that is both mechanically rigid and optically transparent with near-zero dispersion in the terahertz frequency range. Using a low-power terahertz time-domain spectrometer, we experimentally measure the absorption spectra of the vibrational modes of bovine serum albumin from 0.5–2.5 THz and find good agreement with previously reported data obtained using large-volume solutions and a high-power free-electron laser. Our results demonstrate the feasibility of performing high sensitivity terahertz spectroscopy of biomolecules in aqueous solutions with detectable molecular quantities as small as …
Cognitive Radio: Fundamentals And Opportunities., Robert H. Morelos-Zaragoza
Cognitive Radio: Fundamentals And Opportunities., Robert H. Morelos-Zaragoza
Faculty Publications
This talk is aimed at MSEE students in San Jose State University. It provides an overview of cognitive radio concepts and technologies. A MATLAB Simulink of demonstration of digital channel selection using a low IF radio architecture is presented. Technical challenges that remain to be solved in this area are identified.
Automatic Transmit Power Control Of A Digital Fixed Wireless Link With Co-Channel Interference, Robert H. Morelos-Zaragoza, Kyoung-Whoan Suh, Joo-Hwan Lee
Automatic Transmit Power Control Of A Digital Fixed Wireless Link With Co-Channel Interference, Robert H. Morelos-Zaragoza, Kyoung-Whoan Suh, Joo-Hwan Lee
Faculty Publications
In this paper, a study is presented of the dynamic behavior of an automatic transmit power control (ATPC) loop in a single fixed wireless system (FWS) link subject to multipath fading and an uncorrelated co-channel interferer that does not use ATPC (this represents a so-called non-ATPC FWS link or a fixed satellite link). Fundamental questions include the sensitivity of an ATPC link to multipath interference and the co-channel interference that may be caused by a non-ATPC interferer. In the context of the present project, a good example of a non-ATPC interferer is a fixed satellite to which one antenna in …
Implementation Of A Mems Laboratory Course With Modular, Multidisciplinary Team Projects, S J. Lee, S Gleixner, T R. Hsu, David W. Parent
Implementation Of A Mems Laboratory Course With Modular, Multidisciplinary Team Projects, S J. Lee, S Gleixner, T R. Hsu, David W. Parent
Faculty Publications
No abstract provided.
A Development Framework For Hands-On Laboratory Modules In Microelectromechanical Systems (Mems), S J. Lee, S Gleixner, T R. Hsu, David W. Parent
A Development Framework For Hands-On Laboratory Modules In Microelectromechanical Systems (Mems), S J. Lee, S Gleixner, T R. Hsu, David W. Parent
Faculty Publications
No abstract provided.
Modulation Identification And Carrier Recovery System For Adaptive Modulation In Satellite Communications, Kenta Umebayashi, Robert H. Morelos-Zaragoza, Ryuji Kohno
Modulation Identification And Carrier Recovery System For Adaptive Modulation In Satellite Communications, Kenta Umebayashi, Robert H. Morelos-Zaragoza, Ryuji Kohno
Faculty Publications
We introduce the modulation identification technique implementing the multimode phase locked loop (PLL) in the satellite communication using adaptive modulation scheme which is a countermeasure against the rain attenuation. In the multimode PLL, phase lock detectors (PLDs) are used for not only phase lock, but also modulation identification. We present the sub-optimized design of the PLDs for modulation identification with respect to the throughput and show the validity of sub-optimization. In addition, by the comparison between the multimode PLL and conventional scheme in ISDB-S, we present the effectivity of the multimode PLL.
A Suboptimal Receiver With Turbo Block Coding For Ultra-Wideband Communications, Robert H. Morelos-Zaragoza, Timothy Becker, Sim Aquino
A Suboptimal Receiver With Turbo Block Coding For Ultra-Wideband Communications, Robert H. Morelos-Zaragoza, Timothy Becker, Sim Aquino
Faculty Publications
In this paper, the performance of adaptive equalization and turbo product coding is investigated for pulse-based UWB communications in short-range indoor environments. The sensitivity of adaptive LMS linear and nonlinear (decision-feedback) equalizers with respect to the number of training symbols and number of taps is considered. To reduce the error performance variation with respect to changing channel conditions, a turbo product code (TPC) with two component (31,26,3) Hamming codes is proposed. We report simulation results showing that channel coding not only improves error performance, but also reduces significantly the sensitivity of UWB systems in short-range indoor wireless communications.
Using Open-Ended Design Projects In An Open Lab To Teach Lifelong Learning Skills In An Ic Design Course, David Parent
Using Open-Ended Design Projects In An Open Lab To Teach Lifelong Learning Skills In An Ic Design Course, David Parent
Faculty Publications
The ABET criterion, recognition for and the ability to engage in life-long learning, is one of the most important, given that we as engineering educators can not teach every concept that students will encounter over the span of a 20-40 year career as an engineer. We believe that one method to teach and verify this critical skill in the area of Integrated Circuit (IC) design, is to have the students learn IC CAD tools by following well crafted tutorials and then complete open-ended IC design projects in an open lab. The project is supposed to be a full custom design …
Method Of Non-Data-Aided Carrier Recovery With Modulation Identification, Kenta Umebayashi, Robert H. Morelos-Zaragoza, Ryuji Kohno
Method Of Non-Data-Aided Carrier Recovery With Modulation Identification, Kenta Umebayashi, Robert H. Morelos-Zaragoza, Ryuji Kohno
Faculty Publications
A non-data aided carrier recovery technique using digital modulation format identification called multi-mode PLL (Phase Locked Loop) is proposed. This technique can be interpreted as a modulation identification method that is robust against static phase and frequency offsets. The performance of the proposed technique is studied and the analytical expressions are derived for the probability of lock detection, acquisition time over AWGN channel in the cases of M-PSK and M-QAM modulations with respect to frequency offset and signal-to-noise ratio.
Ultra-Wide (Uwb) Communications: New Paradigms And Opportunities., Robert H. Morelos-Zaragoza
Ultra-Wide (Uwb) Communications: New Paradigms And Opportunities., Robert H. Morelos-Zaragoza
Faculty Publications
In this talk, the unique characteristics of ultra wideband (UWB) communications systems are introduced. Receiver design considerations are presented. Focus is on the relation between the symbol duration and the delay spread of the channel. This determines whether the receiver should use a Rake receiver (Spread-spectrum system) or an equalizer (multiple carrier or OFDM system).
Combined Beamforming And Space-Time Block Coding With Sparse Array Antennas, Robert H. Morelos-Zaragoza, Mohammad Ghavami
Combined Beamforming And Space-Time Block Coding With Sparse Array Antennas, Robert H. Morelos-Zaragoza, Mohammad Ghavami
Faculty Publications
No abstract provided.
A Course Assessment Of The Microelectronics Process Engineering Program At Sjsu, Gregory Young, Stacy H. Gleixner, David W. Parent, Yasser Dessouky, Emily Allen, Linda Vanasupa
A Course Assessment Of The Microelectronics Process Engineering Program At Sjsu, Gregory Young, Stacy H. Gleixner, David W. Parent, Yasser Dessouky, Emily Allen, Linda Vanasupa
Faculty Publications
The program assessment strategy of San Jose State University's new interdisciplinary curriculum in Microelectronics Process Engineering is described. Vertical integration of specific class and program learning objectives allows for a clear and efficient method to evaluate the continued growth and improvement of the program. The program assessment process relies on clearly defined and detailed program and course learning objectives that are linked vertically to ABET outcomes. In addition, we discuss briefly the structure of the program and the "hands-on" experience that we provide the students.
Microelectronics Process Engineering At San Jose State University: A Manufacturing-Oriented Interdisciplinary Degree Program, Emily Allen, Stacy H. Gleixner, David W. Parent, Greg Young, Yasser Dessouky, Linda Vanasupa
Microelectronics Process Engineering At San Jose State University: A Manufacturing-Oriented Interdisciplinary Degree Program, Emily Allen, Stacy H. Gleixner, David W. Parent, Greg Young, Yasser Dessouky, Linda Vanasupa
Faculty Publications
San Jose State University's new interdisciplinary curriculum in Microelectronics Process Engineering is described. This baccalaureate program emphasizes hands-on thin-film fabrication experience, manufacturing methods such as statistical process control, and fundamentals of materials science and semiconductor device physics. Each course of the core laboratory sequence integrates fabrication knowledge with process engineering and manufacturing methods. The curriculum development process relies on clearly defined and detailed program and course learning objectives. We also briefly discuss our strategy of making process engineering experiences accessible for all engineering students through both Lab Module and Statistics Module series.
Combined Beamforming And Space-Time Block Coding With A Sparse Array Antenna, Robert H. Morelos-Zaragoza, Mohammad Ghavami
Combined Beamforming And Space-Time Block Coding With A Sparse Array Antenna, Robert H. Morelos-Zaragoza, Mohammad Ghavami
Faculty Publications
We continue our investigation of joint beamforming and transmit diversity with space-time block coding. In particular, the performance of a four-element array antenna is considered, in the context of an indoor wireless communication system. The main contribution is to show that transmit diversity may be practically achieved, even with correlated beams produced by a sparse array antenna.