Organization:
Electrical and Computer Engineering (ECE)

orgunit.page.dateEstablished
orgunit.page.dateDissolved
City
Country
Description
The mission of the Electrical and Computer Engineering department is to provide relevant and unique advanced education and research programs to meet Naval unique needs, and increase the warfighting effectiveness of the U.S. Naval Forces, DoD and allied armed forces. Our students include commissioned officers of the Naval Service, other U.S. and allied armed forces, civilian employees of the Defense Department and international defense establishments. Civilian employees of DoD contractors are also eligible to attend NPS in limited numbers.
Type
Website of the organization
ID

Publication Search Results

Now showing 1 - 10 of 97
  • Publication
    Performance of high-reliability space-qualified processors implementing software defined radios
    (Monterey, California. Naval Postgraduate School, 2014-03) Loomis, Herschel H., Jr.; Dinolt, George W.; Kragh, Frank E.; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
    This report provides results of a study of the application to software-defined radios (SDR) of the Maestro 49-tile Radiation-Hard-by-Design multi-processor chip developed by Boeing Corporation for the U.S. Government using DARPA-developed radiation-hard chip technology. The heart of the pipeline SDR architecture is an implementation of single-precision floating-point pipeline FFT. The details of the software architecture to achieve the pipeline operation are presented. The performance of N-point FFTs for N = 128, 256, 512, 1024, and 2048 is reported as number of processor tiles is increased. Maximum FFT throughput achieved for a 2048-point FFT is 27 million samples per second when 20 of the 49 available tiles are used for separate FFT blocks, one tile is used for input data distribution, and one tile is used for output data collection. The performance of the complete SDR is projected based upon the FFT experiments.
  • Publication
    The Modeling of Bistatic Scattering With Moving Platforms
    (2003) Ziomek, Lawrence J.; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS)
  • Publication
    Development of Protocols for Maritime Mobile Communications
    (Monterey, California. Naval Postgraduate School, 1993-11-12) Borchardt, Randy L.; Ha, Tri T.; Robertson, R. Clark; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
    Data communications are becoming more extensively used in the maritime mobile services. With no current general protocol profile that can be used for data communications between mobile services, it will be advantageous to develop protocols that adhere to the Open System Interconnection (OSI) standards. Implementation of such protocols will allow multiple shipboard equipment to communicate via a shipborne network and then transmit the data to a shore-based network in an effective and efficient manner. Automatic Repeat reQuest (ARQ) techniques are often used by packet-switching networks to provide error-free communication links between network nodes. Information throughput is highly link dependent; as the noise or interference on the link increases, throughput decreases. To improve the throughput on a packet switching communications network, an adaptive ARQ strategy is developed and applied to the Stop-and-Wait protocol. A comparison of the throughput efficiencies of the simulated adaptive SW protocol with the non-adaptive SW protocol showed a marked improvement in throughput when the communication links are subjected to high channel bit error rates.
  • Publication
    Wideband signal analysis for electromagnetic transient waveforms
    (Monterey, California. Naval Postgraduate School, 1996-09) Tummala, Murali; Jeong, Soonho; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
  • Publication
    Digital communications over fading channels
    (Monterey, California. Naval Postgraduate School, 2004) Beltz, Nathan E.; Robertson, R. Clark; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS)
    In this report, the probabilities of bit error for the most commonly used digital modulation techniques are analyzed. Analytic solutions are developed for the probability of bit error when the signal is affected by the most commonly encountered impairment to system performance for a wireless channel, the transmission of the signal over a fading channel. In this report, the effect of a slow, flat Ricean fading channel on communications systems performance is examined. Since channel fading significantly degrades the performance of a communication system, the performance of digital communication systems that also use forward error correction channel coding is analyzed for hard decision decoding and, where appropriate, for soft decision decoding. Diversity, another technique to mitigate the effect of fading channels on digital communication systems performance, is also discussed. Also included is a discussion of the effect of narrowband noise interference, both continuous and pulsed, on digital communication systems. We then discuss the analysis of the probability of bit error for the combination of error correction coding and diversity. Following this, we briefly discuss spread spectrum systems. Next, we examine the link budget analysis and various models for channel loss. Finally, we examine in detail the second generation digital wireless standard Global System for Mobile (GSM).
  • Publication
    New algorithms for the detection and elimination of sine waves and other narrow-band signals in the presence of broadband signals and noise
    (Monterey, CA; Naval Postgraduate School, 1992-10) Soderstrand, Michael A.; Rangarao, Kaluri Venkata.; Loomis, Herschel H.; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Naval Postgraduate School (U.S.); Electrical and Computer Engineering
    Four different classes of adaptive signal cancelers can be used to eliminate narrow-band interference from a broadband signal: (1) cascaded second- order notch filters, (2) high-order in-line notch filters, (3) second-order bandpass noise cancelers, and (4) high-order bandpass noise cancelers. Of the four, a structure based on second-order bandpass filters used as signal cancelers is found to perform better than the other structures. The adaptive algorithm for these filters has been proposed by Kwan and Martin and modified by Petraglia, Mitra, and Szczupak. The Kwan and Martin structure can be reduced in hardware complexity without degrading performance using a new adaptive algorithm that out-performs any of the other known structures or algorithms. This new structure is particularly suited to the elimination of narrow-band interference in broadband Bi-Phase Shift-Key (BPSK) signals with and without background noise.... Narrow-band interference removal, Adaptive interference removal, Pipeline digital filters
  • Publication
    Master of Science in Computer Engineering (MSCE) description
    (Monterey, California: Naval Postgraduate School, 1999-11-01) Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
    Purpose: The MSCE program provides both a broad-based education in traditional computer hardware and software related subjects while at the same time concentrating on military-relevant Computer Engineering tops such as Computer Security, High-Speed Networking, Distributed and Parallel computing, and Fault Tolerant computing.
  • Publication
    Improvement of the Time Difference of Arrival (TDOA) estimation of GSM signals using wavelets
    (Monterey, California. Naval Postgraduate School, 2000-06-30) Hippenstiel, Ralph Dieter; Haney, Timothy; Ha, Tri T.; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
    The problem of localization of wireless emitters (GSM based) using time difference of arrival (TDOA) techniques is studied. The wavelet transform and denoising techniques are used to increase the accuracy of the TDOA estimate. GSM like signals are simulated using the Hewlett-Packard Advanced Designs System (HP-ADS) software. Improvement in the mean squared error (MSE) of the TDOA estimate is demonstrated. It is shown that the improvement depends on signal to noise (SNR) ratio, data length, bandwidth, and on spectral location within the frequency band of interest.
  • Publication
    The Military Applications of MEO and ICO Commercial Satellite Systems
    (Monterey, California. Naval Postgraduate School, 1998-09-15) Kakavas, Ioannis; Ha, Tri T.; Garcia, Vicente; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Electrical and Computer Engineering
    At the dawn of the 21st century several low and medium earth orbit commercial satellite constellations will be operational and they will be able to provide high bandwidth global communications in voice, data, and multimedia services for mobile consumers and also "users in the move." This research evolves as a continuation of previous studies (on Iridium, Globalstar, Teledesic, and Odyssey), and considers the ICO as well as the Teledesic and GBS systems in an effort to provide a comprehensive model architecture. This model accommodates narrowband, wideband, and broadcast requirements, respectively, of the U.S. MILSATCOM in addition to the communication needs of a model UN peacekeeping mission. The application of these systems to U.S. MILSATCOM coincides perfectly with the U.S. defense doctrine of a CONUS-based military with the capability of rapid global power projection to respond to crises throughout the global arena. Instead of investing heavily in new satellite systems, the U.S. military services can use the forthcoming commercial LEO and MEO systems to meet the information requirements of tactical commanders.
  • Publication
    Multiple-valued programmable logic array minimization by simulated annealing
    (Monterey, CA; Naval Postgraduate School, 1992) Dueck, Gerard W.; Earle, Robert C.; Butler, Jon T.; Tirumalai, Parthasarathy; Electrical and Computer Engineering (ECE); Graduate School of Engineering and Applied Science (GSEAS); Naval Postgraduate School (U.S.); Electrical and Computer Engineering
    We propose a solution to the minimization problem of multiple-valued programmable logic arrays (PLA) that uses simulated annealing. The algorithm accepts a sum-of-products expression, divides and recombines the product terms, gradually progressing toward a minimal solution. The input expression can be user-specified or one produced by another heuristic. The process is termed simulated annealing because it has an analog in the statistical mechanical model of annealing in solids. That is, the slow cooling of certain solids results in a state of low energy, a crystalline state rather than an amorphous state that results from fast cooling. In a PLA, the crystalline state is analogous to a realization with a small number of product terms. Unlike recently studied minimization techniques (which are classified as direct cover methods), our technique manipulates product terms directly, breaking them up and joining them in different was while reducing the total number of product terms. Computer- aided design tool, multiple-valued logic, programmable logic array, heuristic minimization technique VLSI design tool