Dissertations / Theses on the topic 'Pulse-code modulation'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Pulse-code modulation.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Lum, Randall M. G. "Differential pulse code modulation data compression." Scholarly Commons, 1989. https://scholarlycommons.pacific.edu/uop_etds/2181.
Full textBaughman, James E. "A High Speed Miniature Pulse Code Modulation System." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614639.
Full textIncreasing speed and complexity of guidance and target acquisition systems being developed for SDI missile interceptors mandate new performance standards for today's airborne telemetry systems. High bandwidth video data merged with a myriad of high sample rate analog and digital channels have pushed bit rates to 10 MBPS (Mega Bits Per Second) and beyond. These bit rates which are an order of magnitude beyond most telemetry systems in use today, result in the need for a new architecture which facilitates data transfer at these higher rates.
Ahn, Seung Choon. "Variable threshold detection with weighted PCM signal transmitted over Gussian channel." Ohio : Ohio University, 1986. http://www.ohiolink.edu/etd/view.cgi?ohiou1183126123.
Full textNavickas, T. A., and S. G. Jones. "PULSE CODE MODULATION DATA COMPRESSION FOR AUTOMATED TEST EQUIPMENT." International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/612065.
Full textDevelopment of automated test equipment for an advanced telemetry system requires continuous monitoring of PCM data while exercising telemetry inputs. This requirements leads to a large amount of data that needs to be stored and later analyzed. For example, a data stream of 4 Mbits/s and a test time of thirty minutes would yield 900 Mbytes of raw data. With this raw data, information needs to be stored to correlate the raw data to the test stimulus. This leads to a total of 1.8 Gb of data to be stored and analyzed. There is no method to analyze this amount of data in a reasonable time. A data compression method is needed to reduce the amount of data collected to a reasonable amount. The solution to the problem was data reduction. Data reduction was accomplished by real time limit checking, time stamping, and smart software. Limit checking was accomplished by an eight state finite state machine and four compression algorithms. Time stamping was needed to correlate stimulus to the appropriate output for data reconstruction. The software was written in the C programming language with a DOS extender used to allow it to run in extended mode. A 94 - 98% compression in the amount of data gathered was accomplished using this method.
Collaer, Marcia Lee. "IMAGE DATA COMPRESSION: DIFFERENTIAL PULSE CODE MODULATION OF TOMOGRAPHIC PROJECTIONS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291412.
Full textMa, Kuang-Hua. "Image compression using a double differential pulse code modulation technique (DPCM/DPCM." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178215120.
Full textWong, K. H. J. "Adaptive differential pulse code modulation and sub-band coding of speech signals." Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380170.
Full textSee, Chun Kit. "Hybrid pulse interval modulation-code-division multiple-access for optical wireless communications." Thesis, Sheffield Hallam University, 2003. http://shura.shu.ac.uk/20340/.
Full textYoshida, K. "Speech coding by adaptive differential pulse code modulation with adaptive bit allocation." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37905.
Full textCooperwood, Michael Vonshay. "Analysis and performance comparison of adaptive differential pulse code modulation data compression systems." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA307823.
Full textElsabrouty, Maha. "Receiver-based packet loss concealment for pulse code modulation (PCM G.711) coders." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6306.
Full textŠiška, Martin. "Impulzové modulace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220215.
Full textBaker, Kenneth R. "Importance sampling simulation of free-space optical APD pulse position modulation receivers." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-172207/.
Full textZichy, Michael Andrew. "[Sigma Delta] Quantization with the hexagon norm in C /." Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/zichym/michaelzichy.pdf.
Full textTate, Jeffrey J. "Automating Signal Conditioning Setup Through Integration with Sensor Information." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607535.
Full textCaterpillar Inc. has been testing construction and mining equipment using Computerized Analysis Vans for two decades. During our latest van upgrade, we chose to move to PCM/FM from FM/FM mainly to increase the channel count. We also replaced our old signal conditioning that used span and balance potentiometers with computer programmable signal conditioning. This new signal conditioning requires that the gain and balance point be calculated for every channel on each test. The formulas for these calculations depend on the sensor, the signal conditioning card used, and the test requirements. Due to the number and variety of machines tested at the Caterpillar Proving Grounds, these calculations needed to be automated. Using a few initial parameters and the information from our sensor calibration database, each channel’s balance point, gain, and expected slope are calculated. This system has increased productivity, accuracy, and consistency over manually calculating these parameters. This paper covers the sensor database, the calculated parameters and an overview of the way the system works.
Svensson, Ake, and Michael Maoz. "HIGH SHOCK, COMPUTERIZED, MINIATURE, AIRBORNE PCM/FM TELEMETRY SYSTEM." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614501.
Full textAydin Vector Division has developed and manufactured an airborne, high shock, wideband FM/FM telemetry system for Saab Missiles AB in Sweden. This system was presented in the ITC Proceedings of 1988, Volume XXIV, pp 71-84 (Ref [1]). Three such systems were supplied. Saab Missiles AB also awarded Aydin Vector Division with an additional order for a larger number of high shock, computer based, specially designed, miniature PCM/FM airborne telemetry systems. These systems were developed, manufactured and supplied to Saab Missiles AB, and have been extensively and successfully used in the Swedish program. The PCM/FM telemetry package described in this paper was used for the system testing and the firing trials program of a mortar projectile, where the measurement requirements included micro processor interfaces, as well as a high amount of analog and bi-level data channels. The paper covers the specifications of the PCM/FM system mentioned above, the concept that was used to meet these specifications, the system’s mechanical and electrical design, the packaging technique and some of the test results.
Borgen, Gary. "MICROCONTROLLER BASED PCM ENCODERS FOR TELEMETRY INSTRUMENTATION." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604920.
Full textPulse Code Modulation (PCM) Encoders used in Telemetry Instrumentation systems have traditionally been implemented using sequencer or state-machine based micro-architectures with distributed control and signal acquisition components. This architecture requires the use of many discrete electronic components and custom micro-code programming or state machine development for the control of the systems. The advent of relatively high-speed microcontrollers with embedded signal acquisition subsystems has brought about the ability to implement highly integrated PCM Encoder systems using fewer components and standardized programming methods. This paper will discuss sequencer based PCM encoders for background and then introduce the concept of Microcontroller Based PCM Encoders for Telemetry Instrumentation. Specific design examples will be introduced. Advantages and disadvantages of the two techniques will be discussed.
Cirineo, Tony. "Doppler Video Signal Conditioning, Theory of Operation." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/611417.
Full textThis paper describes some of the signal conditioning and processing circuits that were developed to reconstruct the doppler video signal from a radar receiver under test. The reconstructed doppler video signal is then digitized and put into a telemetry frame for transmission to a ground receiving station.
PENHARLOW, DAVID. "MICROMINIATURE DISTRIBUTED DATA ACQUISITION SYSTEM." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613485.
Full textThe new generation of advanced tactical aircraft and missiles places unique demands on the electronic and mechanical designs for flight test instrumentation, high bit rates, operating temperature range and system interconnect wiring requirements. This paper describes a microminiature PCM distributed data acquisition system with integral signal conditioning (MMSC) which has been used in advanced aircraft and missile flight testing. The MMSC system is constructed from microminiature, stackable modules which allow the user to reconfigure the system as the requirements change. A second system is also described which uses the same circuitry in hermetic hybrid packages on plug-in circuit boards.
Gaddis, William R. Jr, and Sawn Sandland. "AATIS AND CAIS DATA RECORDING." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/608876.
Full textDOD flight test centers need affordable, small-format, flight-qualified digital instrumentation recording solutions to support existing and future flight testing. The Advanced Airborne Test Instrumentation System (AATIS) is today's primary data acquisition system at the Air Force Flight Test Center (AFFTC). Digital Recorder (DR) 1995 is planned to provide full support for AATIS output capabilities and satisfy initial recording requirements for the Common Airborne Instrumentation System (CAIS). The follow-on to the AATIS, the CAIS is a tri-service development to satisfy future DOD flight test data acquisition requirements. DR 2000 is planned as the future recording solution for CAIS and will be able to fully satisfy the 50 Mbps recording requirement. In the developments of DR 1995 and DR 2000, commonality and interoperability have emerged as significant issues. This paper presents an overview of these recording solutions and examines commonality and interoperability issues.
Aue, Volker. "Optimum linear single user detection in direct-sequence spread-spectrum multiple access systems." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/43609.
Full textAfter Qualcomm's proposal of the IS-95 standard, code-division multiple access (CDMA) gained popularity as an alternative multiple-access scheme in cellular and personal communication systems (PCS). Besides the advantage of allowing asynchronous operation of the users, CDMA direct-sequence spread spectrum (DS-SS) offers resistance to frequency selective fading and graceful degradation of the performance as the number of users increases.
Orthogonality of the signals in time-division multiple access and frequency-division multiple access is inherent from the nature of the multiple access scheme. In a CDMA system, orthogonality of the signals is not guaranteed in general. Consequently, the performance of conventional correlation receivers suffers.
Sub-optimum receivers which use knowledge of the interfering signals have been investigated by other researchers. These receivers attempt to cancel the multi-user interference by despreading the interfering users. Hence, these receivers require knowledge about all the spreading codes, amplitude levels, and signal timing, and are, in general, computationally intensive.
In this thesis, a technique is presented for which a high degree of interference rejection can be obtained without the necessity of despreading each user. It is shown that exploiting spectral correlation can help mitigate the effects of the multiple-access interference. If code-on-pulse DS-SS modulation is used, a cyclic form of the Wiener filter provides substantial improvements in performance in terms of bit error rate and user capacity. Furthermore, it is shown, that a special error-criterion should be used to adapt the weights of the filter.
The computational complexity of the receiver is equivalent to that of conventional equalizers.
Master of Science
Grant, Eugene. "INTERCEPTOR TARGET MISSILE TELEMETRY." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607598.
Full textA target missile is a unique piece of test hardware. This test tool must be highly reliable, low cost and simple and must perform any task that the developing interceptor missile planners require. The target missile must have ample power and guidance resources to put the target in a specified place in the sky at a desired time. The telemetry and measurement system for the target missile must have the same requirements as its interceptor missile but must be flexible enough to accept new requirements as they are applied to the target and its interceptor. The United States Army has tasked Coleman Aerospace to design and build this type of target missile. This paper describes and analyzes the telemetry and instrumentation system that a Hera target missile carries. This system has been flying for the past two years, has completed seven out of seven successful test flights and has accomplished all test objectives to date. The telemetry and instrumentation system is an integral part of the missile self-test system. All preflight checks and flight simulations are made with the on-board three-link telemetry system through a radio frequency (RF) link directly through the missile antenna system to a ground station antenna. If an RF transmission path is not available due to test range restrictions, a fiber-optic cable links the pulse code modulator (PCM) encoder to the receiving ground stations which include the bitsync, decommutator and recorders. With this capability, alternative testing is not limited by RF test range availability. The ground stations include two mobile stations and a factory station for all testing including preflight testing of the missile system prior to flight test launches. These three ground stations are built in a single configuration with additional equipment in the mobile units for use at remote locations. The design, fabrication, testing and utilization of these ground stations are reviewed. The telemetry system is a modification of the classical PCM system and will operate with its interceptor missile at least into the first decade from the year 2000.
Ng, Sunny, Mei Y. Wei, Austin Somes, Mich Aoyagi, and Joe Leung. "REAL-TIME DATA SERVER-CLIENT SYSTEM FOR THE NEAR REAL-TIME RESEARCH ANALYSIS OF ENSEMBLE DATA." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/609671.
Full textThis paper describes a distributed network client-server system developed for researchers to perform real-time or near-real-time analyses on ensembles of telemetry data previously done in post-flight. The client-server software approach provides extensible computing and real-time access to data at multiple remote client sites. Researchers at remote sites can share similar information as those at the test site. The system has been used successfully in numerous commercial, academic and NASA wide aircraft flight testing.
Berdugo, Albert, and William G. Ricker. "A NEW 1553 ALL-BUS INSTRUMENTATION MONITOR." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613782.
Full textIncreased data throughput demands in military and avionics systems has led to the development of an advanced, All-Bus MIL-STD-1553 Instrumentation Monitor. This paper discusses an airborne unit which acquires the information from up to 8 dual-redundant buses, and formats the data for telemetry, recording or real-time analysis according to the requirements of IRIG-106-86, Chapter 8. The ALBUS-1553 acquires all or selected 1553 messages which are formatted into IRIG-compatible serial data stream outputs. Data is time tagged to microsecond resolution. The unit selectively transmits entire or partial 1553 messages under program control. This results in reduced transmission bandwidth if prior knowledge of 1553 traffic is known. The ALBUS also encodes analog voice inputs, discrete userword inputs and multiplexed analog (overhead) inputs. The unit is provided in a ruggedized airborne housing utilizing standard ATR packaging,
Papich, William J. "THE USE OF TELEMETRY IN AN ELECTROMAGNETIC TEST ENVIRONMENT." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607292.
Full textThe U.S. Army Redstone Technical Test Center (RTTC) uses telemetry as a vital part of its data acquisition and analysis for electromagnetic environmental effects developmental testing of U.S. Army weapon systems. Testing in an electromagnetic environment poses several unique challenges. These challenges have resulted in the development of highly customized telemetry and data acquisition systems. This paper discusses the design and integration of past and current telemetry needs to incorporate real-time or near real-time simulations or scene generations into the testing process.
Hochner, William "Bill." "B-2 Flight Test Implementation of an Ethernet Based Network System for Data Acquisition." International Foundation for Telemetering, 2015. http://hdl.handle.net/10150/596404.
Full textNorthrop Grumman Corporation's B-2 Flight Test Instrumentation team is revamping its entire Data Acquisition System (DAS) to be an Ethernet based network (EBN) system that will provide simplified wiring, higher speeds, greater capacity, and control over the data. The old system became obsolete in terms of capability and maintainability. New on-board avionic systems also demand that the Flight Test Instrumentation group (INSTR) accommodate fiber and high speed Ethernet data. In addition, the footprint and location for INSTR systems and components will be moved to remote areas. INSTR engineering selected the Teletronics Technology Corporation's Ethernet networked Data Acquisition Units (DAUs), known as MnDAUs, as the core system. Prior to the first flight utilization of the new INSTR DAS will undergo extensive lab and field testing to assure flight test effectiveness and the accuracy of all necessary data products. The goal is to acquire and employ the best system available while avoiding costly lessons.
Eccles, Lee, Michael O’Brien, and William Anderson. "DATA ACQUISITION SYSTEM FOR AIRCRAFT QUALIFICATION." International Foundation for Telemetering, 1986. http://hdl.handle.net/10150/615566.
Full textThe Boeing Commercial Airplane Company presently uses an Airborne Data Analysis and Monitor System (ADAMS) to support extensive qualification testing on new and modified commercial aircraft. The ADAMS system consists of subsystems controlled by independent processors which preprocess serial PCM data, perform application-specific processing, provide graphic display of data, and manage mass storage resources. Setup and control information is passed between processors using the Ethernet protocol on a fiber optic network. Tagged data is passed between processors using a data bus with networking characteristics. During qualification tests, data are dynamically selected, analyses performed, and results recorded. Decisions to proceed or repeat tests are made in real time on the aircraft. Instrumentation in present aircraft includes up to 3700 sensors, with projections for 5750 sensors in the next generation. Concurrently, data throughput rates are increasing, and data preprocessing requirements are becoming more complex. Fairchild Weston Systems, Inc., under contract to Boeing, has developed an Acquisition Interface Assembly (AIA) which accepts multiple streams of PCM data, controls recording and playback on analog tape, performs high speed data preprocessing, and distributes the data to the other ADAMS subsystems. The AIA processes one to three streams in any of the standard IRIG PCM formats using programmable bit, frame and subframe synchronizers. Data from ARINC buses with embedded measurement labels, bus ID’s, and time tags may also be processed by the AIA. Preprocessing is accomplished by two high-performance Distributed Processing Units (DPU) operating in either pipeline or parallel environments. The DPU’s perform concatenation functions, number system conversions, engineering unit conversions, and data tagging for distribution to the ADAMS system. Time information, from either a time code generator or tape playback, may be merged with data with a 0.1 msec resolution. Control and status functions are coordinated by an embedded processor, and are accessible to other ADAMS processors via both the Ethernet interface and a local operator’s terminal. Because the AIA assembly is used in aircraft, the entire functional capability has been packaged in a 14-inch high, rack-mountable chassis with EMI shielding. The unit has been designed for high temperature, high altitude, vibrating environments. The AIA will be a key element in aircraft qualification testing at Boeing well into the next generation of airframes, and specification, design, development, and implementation of the AIA has been carried out with the significance of that fact in mind.
Martins, Gabriel Soares 1983. "Construção de um turbidímetro de baixo custo para controle de qualidade de efluentes industriais." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263484.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-21T21:54:45Z (GMT). No. of bitstreams: 1 Martins_GabrielSoares_M.pdf: 6495887 bytes, checksum: 4a05e53032d23853568df2eca3d4ecf7 (MD5) Previous issue date: 2012
Resumo: Medir a qualidade da água sempre foi importante para as agências governamentais, organizações científicas e a própria sociedade manterem o nível de contaminação da água em patamares que não afetem a sobrevivência de nenhum ser vivo. Rastrear de forma mais detalhada e precisa os efluentes industriais que retornam aos rios e lagos das cidades, através da instalação de diversos medidores ao longo das linhas de distribuição de água industriais, auxilia na manutenção da qualidade da água destas fontes naturais. Os medidores existentes atualmente, conhecidos por turbidímetros, são caros, o que impede o amplo monitoramento das linhas de água. O objetivo desta dissertação é a construção de um turbidímetro de baixo custo que seja capaz de auxiliar na avaliação dos efluentes industriais. O turbidímetro proposto é baseado no GLI Método 2 (Great Lake Instruments Method 2), que emprega duas técnicas de espectroscopia: a nefelometria e a turbidimetria. A contribuição dada por esta dissertação está na aplicação da técnica de modulação por amplitude de pulso com amostragem instantânea, muito utilizada em telecomunicações, com o intuito de mitigar qualquer deslocamento do sinal devido às fontes de luz do ambiente e outras interferências do circuito eletrônico. O equipamento consegue medir uma faixa de turbidez de 16 a 4000 NTU. Abaixo de 16 NTU não há precisão nas medidas devido à intensa presença de ruído no sinal nefelométrico. Apesar de não conseguir medir o nível de turbidez aceitável de água apropriada para consumo (5 NTU), considera-se a faixa de medição suficiente para se medir efluentes indústrias e monitorá-los para não que não poluam os rios e reservatórios das cidades
Abstract: Measuring water quality has always been important for government agencies; scientific organizations and society maintain the level of water contamination at levels that do not affect the survival of any living being. Track, with more details and accuracy, the industrial effluents that return to the rivers and the lakes of the cities through the installation of several meters along the water lines of industries, helps maintain water quality of the natural sources. The meters currently existing, known for turbidimeters, are expensive, which prevents the widespread monitoring of water lines. The objective of this dissertation is design a low cost turbidimeter that is able to assist in the assessment of industrial effluents. The turbidimeter proposed is based on the GLI Method 2 (Great Lake Instruments Method 2), which employs two spectroscopic techniques: nephelometry and turbidimetry. The contribution of this dissertation is in applying the technique of pulse amplitude modulation with instantaneous sampling, widely used in telecommunications, in order to mitigate any signal offset due to ambient light sources and interference from the electronic circuit. The equipment can measure a range of 16-4000 turbidity NTU. Below 16 NTU there is no accuracy in measurements because the noise interfering in the nephelometric signal. Although the equipment cannot measure the acceptable turbidity level of drinking water (5 NTU), it is considered sufficient to measure industrial effluents and track them to not pollute the rivers and reservoirs of cities
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
Filho, Nelson Whitaker. "Aircraft Distance Measurement System." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611674.
Full textThe Aircraft Distance Measurement System (ADMS) could be used in Flight Test application to determine the aircraft position and speed during takeoff, landing and acceleration-stop performance test within runway limits using a microwave link.
Knoebel, Robert, and Albert Berdugo. "“CAIS GROUND SUPPORT EQUIPMENT USING A LOW COST, PC-BASED PLATFORM”." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/607589.
Full textThe Common Airborne Instrumentation System (CAIS) was developed under the auspices of the Department of Defense to promote standardization, commonality, and interoperability among flight test instrumentation. The central characteristic of CAIS is a common suite of equipment used across service boundaries and in many airframe and weapon systems. The CAIS system has many advanced capabilities which must be tested during ground support and system test. There is a need for a common set of low cost, highly capable ground support hardware and software tools to facilitate these tasks. The ground support system should combine commonly available PC-based telemetry tools with unique devices needed for CAIS applications (such as CAIS Bus Emulator, CAIS Hardware Simulator, etc.). An integrated software suite is imperative to support this equipment. A CAIS Ground Support Unit (GSU) has been developed to promote these CAIS goals. This paper presents the capabilities and features of a PC-based CAIS GSU, emphasizing those features that are unique to CAIS. Hardware tools developed to provide CAIS Bus Emulation and CAIS Hardware Simulation are also described.
Afiomah, Stephen U. "A decision-directed-detection scheme for PCM systems in a noisy environment." Ohio : Ohio University, 1986. http://www.ohiolink.edu/etd/view.cgi?ohiou1183125570.
Full textKnudtson, Kevin, Alice Park, Bob Downing, Jack Sheldon, Robert Harvey, and April Norcross. "The Western Aeronautical Test Range Chapter 10 Tools." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595770.
Full textThe Western Aeronautical Test Range (WATR) staff at the NASA Dryden Flight Research Center is developing a translation software called Chapter 10 Tools in response to challenges posed by post-flight processing data files originating from various on-board digital recorders that follow the Range Commanders Council Inter-Range Instrumentation Group (IRIG) 106 Chapter 10 Digital Recording Standard but use differing interpretations of the Standard. The software will read the date files regardless of the vendor implementation of the source recorder, displaying data, identifying and correcting errors, and producing a data file that can be successfully processed post-flight.
Morgan, Jon, and Charles H. Jones. "PCM Backfill: Providing PCM to the Control Room Without Dropouts." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577490.
Full textOne of the initial control room capabilities to be demonstrated by iNET program is the ability to provide data displays in the control room that do not contain data dropouts. This concept is called PCM Backfill where PCM data is both transmitted via traditional SST and recorded onboard via an iNET compatible recorder. When data dropouts occur, data requests are made over the telemetry network to the recorder for the missing portions of the PCM data stream. The retrieved data is sent over the telemetry network to the backfill application and ultimately delivered to a pristine data display. The integration of traditional SST and the PCM Backfill capability provides both real-time safety of flight data side-by-side with pristine data suitable for advanced analysis.
Knudtson, Kevin M., and Randy Glass. "DIGITAL VOICE DECODING IN TODAY'S TELEMETRY SYSTEM." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607327.
Full textToday’s telemetry systems can reduce spectrum demand and maintain secure voice by encoding analog voice into digital data using; Continuously Variable Slope Delta Modulation ( CVSD ) format and imbedding it into a telemetry stream. The model CSC-0390 DvD system is an excellent choice in decoding digital voice, designed with flexibility, efficiency, and simplicity in mind. Flexibility in design brings forth a capability of operating on a wide variety of telemetry systems and data formats without any specialized interfaces. The utilization of 74HC series circuit technology makes this DvD system efficient in design, low cost, and lower power consumption. In addition the front panel display and control function is also is an example of Simplicity in design and operation.
Grace, Thomas. "COMMON AIRBORNE INSTRUMENTATION SYSTEM; A FRESH LOOK." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606475.
Full textThe US Government originally funded the development of the Common Airborne Instrumentation System (CAIS) to address industry-wide compatibility, maintenance, and commonality issues. Although initially targeted for US Department of Defense (DoD) programs, CAIS is also being used throughout the world in many commercial applications. This paper provides a fresh look at the evolution of the CAIS concept starting with some historical background of the CAIS Program, an overview of the CAIS System Architecture and recent trends in the use of “Commercial Off The Shelf (COTS)” products and technology.
Spáčil, Tomáš. "Bicí automat pro hudebníky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220353.
Full textКубів, Роман Володимирович, and Roman V. Kubiv. "Дослідження адаптивної диференціальної імпульсно-кодової модуляції голосового сигналу." Thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2013. http://elartu.tntu.edu.ua/handle/123456789/2679.
Full textThe thesis for Magister's degree in the technical sciences on the specialty 8.05010201 – Computer systems and networks. – Ternopil National Technical University. I. Pul'uj, Ternopil, 2013.
Роботу присвячено дослідженню адаптивної диференціальної імпульсно- кодової модуляції для вибору методу кодування з врахуванням забезпечення користувача якісним голосовим зв'язком, а також можливістю передачі цифрових даних. Проведено аналіз існуючих методів кодування мовних сигналів, розглянуто основні принципи побудови систем з адаптивною диференціальною імпульсно-кодовою модуляцією для кодування голосового сигналу. Розроблено алгоритм роботи універсального декодера адаптивної диференціальної імпульсно-кодової модуляції голосового сигналу.
Work is devoted to adaptive differential pulse code modulation to select encoding method, taking into account user software quality voice communication and the ability to transfer digital data. An analysis of existing methods of encoding speech signals, the basic principles of the system with an adaptive differential pulse code modulation to encode the voice signal. The algorithm of the universal decoder adaptive differential pulse code modulation of voice signal.
Contino, Sergio. "Development of Software Tools for the Test of Ultra Wide Band Receivers." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4327/.
Full textBillings, Don, Mei Wei, Joseph Leung, Michio Aoyagi, Fred Shigemoto, and Rob Honeyman. "REAL-TIME INTEGRATION OF RADAR INFORMATION, AND GROUND AND RADIOSONDE METEOROLOGY WITH FLIGHT RESEARCH DATA." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607368.
Full textAlthough PCM/TDM framed data is one of the most prevalent formats handled by flight test ranges, it is often required to acquire and process other types. Examples of such non-standard data types are radar position information and meteorological data from both ground based and radiosonde systems. To facilitate the process and management of such non-standard data types, a micro-processor based system was developed to acquire and transform them into a standard PCM/TDM data frame. This obviated the expense of developing additional special software and hardware to handle such non-standard data types.
Wan-ZhenHuang and 黃婉甄. "Adaptive Differential Pulse Code Modulation for Audio Signals." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/qt67qr.
Full textChen, Horng-Bin, and 陳鴻斌. "Advanced Double Predictor Differential Pulse Code Modulation Image Transmission System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/52648235553857997819.
Full text大葉大學
電機工程研究所
87
The thesis is focused on the improvement of Double Predictor Differential Pulse Code Modulation algorithm for image data compression to increase the image transmission speed. We adopt the Quadtree segmentation algorithm to divide the real-world images into regions having widely differing perceptual importance. The detail regions of a given image will be segmented into blocks with smaller block size, and the background regions of the image will be assigned larger block size for the blocks. After the pre-processing of Quadtree segmentation, the differential values between the near by pixels of each image block are reduced. Therefore, we can decrease the distribution range of prediction error as well as reduce the bit rate and quantization levels. We also use the double predictor DPCM architecture for the proposed image coding system. The conventional DPCM image coding system can be easily affected by a larger fed-back quanti-zation error while transmitted over an error-free channel. The advantage of double predictor DPCM system is to reduce the affect from the fed-back quantization error and not to increase the system complexity. The system performance results of the proposed variable block-size Double Predictor DPCM image encoder/decoder system are about 5 to 6 dB coding gain in signal to noise ratio（SNR） than the conventional DPCM system.
Cronje, Bernhard. "Evaluation of a poisson windowed test signal for pcm codecs." Thesis, 2015. http://hdl.handle.net/10539/16550.
Full textDe, Beer Daniel Jacobus. "Aspekte van die ontwikkeling van 'n herhalermodule vir pulskodemodulasiestelsels." Thesis, 2014. http://hdl.handle.net/10210/12200.
Full textWu, Cong-Nan, and 吳聰男. "The Research,Design and Application of Adaptive Pulse Code Modulation Speech Codec." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/56932765701443924098.
Full textWu, tsong-nan, and 吳聰男. "The Research,Design and Application of Adaptive Pulse Code Modulation Speech Codec." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/81556512688010405338.
Full text淡江大學
電機工程學系
84
The speech application are very popular in the world today, such as telephone,voice mail box,speech recognition,speech synthesis...etc.The amout of orginal speech data is very large. If we don't process those stored speech data , it must cost much memory.For example,if we record speech signal with 8 KHZ sampling rate and 8 bits per sample,we need 64k bits memory per second and 3.84 Mbits per minute . In the region of speech coding, people try to reduce the bit rate of speech data and make reconstructed signal comfortable for people.This paper focuses on using less bit rate to implement speech application. Sound baster is used to record speech signal and Adaptive Differential Pulse Code Modulation (ADPCM ) bases on International Telegraph and Telephone Consultative Committee (CCITT) G.721 standard is adopted to compress speech data in this paper.The sampling rate is 8 KHZ and 4 bits per sample. In ADPCM system , one word memory adaptive quantizer and adaptive preditor is adopted to reduce bit rate in this paper. In the decoder of ADPCM , a 8-bit mircocontroller is adopted to implement this algorithm.Besides,the paper use verilog to simulate the interface between the mircocontroller,memory and D- to-A converter.After finishing all simulation,the paper uses FPGA to verify whole system in real world. Besides,this paper design a simple application using this speech decoder to make sure the quantity of output speech accepted by the people.
Benghuzzi, Mohsin M. Gross Frank B. "Passive detection suppression of cyclostationary phase coded waveforms." 2003. http://etd.lib.fsu.edu/theses/available/etd-09042003-145334/.
Full textAdvisor: Dr. Frank Gross, Florida State University, FAMU-FSU College of Engineering, Dept. of Electrical and Computer Engineering. Title and description from dissertation home page (viewed Oct. 3, 2003). Includes bibliographical references.
CHUNG, HSIN-CHUN, and 鍾新志. "Advanced Double Predictor Dofferential Pulse Code Modulation Image Transmission System Over Fading Channel." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/15871976111878200226.
Full text大葉大學
電機工程研究所
90
ABSTRACT In this study, we use quadtree segmentation method to improve the non-stationary statistic characteristics of digital image models. The double predictor differential pulse code modulation (DP-DPCM) system can reduce the quantization error than that in tradition differential pulse code modulation (DPCM) system. Therefore, DP-DPCM algorithm can possess better data compression ratio as well as increase system transmission rate. The transmission medium is modeled as a fading communication channel and quadrature phase shift keying (QPSK) modulation is adopted in the study. For channel coding, we use convolution encoder and maximum-likelihood Viterbi hard decision decoder. The channel coding scheme is to protect the transmitted source data and to reduce bit error rate (BER) in fading channel. Performance of this advanced double predictor differential pulse code modulation image transmission system over fading channel is evaluated in this research. Key Words : quadtree segmentation, non-stationary statistical, double predictor differential pulse code modulation, differential pulse code modulation, quadrature phase shift keying, fading channel.
Guan-TingLiu and 劉冠廷. "EEG Compression System using embedded zerotree wavelet and adaptive differential pulse code modulation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/4ae738.
Full textDebbo, George Alfred. "A proposed test system and strategy for the production testing of pulse code modulation codecs." Thesis, 2015. http://hdl.handle.net/10539/17041.
Full textSONG, WIN-SEN, and 宋文勝. "A study of two divisions processing for super pulse code modulation and its regenerator for VLSI." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/88796625683607605486.
Full text