2 edition of Detection processes for digital satellite modems found in the catalog.
Detection processes for digital satellite modems
S. B. Aftelak
Written in English
Thesis(Ph.D.) - Loughborough University of Technology 1985.
|Statement||by S.B. Aftelak.|
Satellite Comm Networks Radar Systems Detect/ Estimation Estim & Adap Filt Inform/ Coding random processes – The waveform aspects of digital comm bring digital sig-nalprocessing(DSP)totheforefront;simulate/implement All-digital phone systems result in modem . Even though the emphasis of the book is on digital communications, necessary analog fundamentals are included, since analog waveforms are used for the radio transmission of digital signals.
Spread-spectrum modems for satellite communication currently on the market are targeted towards voice and facsimile communications at rates up to 10 kb/s using transmission bandwidths up to 5 MHz. John M. Cioffi Room , David Packard Electrical Engineering Jane Stanford Way, MC Stanford, CA [email protected]
Satellite remote sensing era begins: CORONA satellite system developes The Zenit 2 program (Soviet Union) TIROS: first Meteorological satellite -purpose to detect clouds • Cold War intensifies. • US search for signs of military activity • Air planes shot down need for satellites. • These satellites were active. including detection of point targets and imaging of extended use of EO/IR for tracking targets is also covered, as are some recent technological advancements. Finally, sections are dedicated to the topics of sampling, aliasing, and reconstruction, and issues in color cameras.
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Detection processes for digital satellite modems Author: Aftelak, Stephen B. ISNI: The aim of this study is to devise detectors for digital satellite modems, that have tolerances to additive white Gaussian noise which are as close as possible to that for optimal detection, at a fraction of the equipment complexity required for optimal Author: Stephen B.
Aftelak. This book uses a practical approach in the application of theoretical concepts to digital communications in the design of software defined radio modems.
This book discusses the design, implementation and performance verification of waveforms and algorithms appropriate for digital data modulation and demodulation in modern communication systems. Using a building-block approach, the author. This Chapter considers the modems used in digital communications systems.
In particular, the design and implementation of modems for mobile satellite (mobilesat) systems will be examined. These modems provide a good illustration of the need for advanced approaches to modem design because of the propagation characteristics of the mobilesat : William G.
Cowley. The paper outlines the problems encountered when attempting to design and construct a kbit s−1 satellite modem using digital techniques as far as Author: W.
Marshall, D. Hoare, A. Clark. This book uses a practical approach in the application of theoretical concepts to digital communications in the design of software defined radio modems. This book discusses the design, implementation and performance verification of waveforms and algorithms appropriate for digital data modulation and demodulation in modern communication : $ Interpreting Digital Radar Images page 3 Interpreting Digital Radar Images Aircraft-mounted imaging radar systems have been in use for several decades.
Early systems processed the recorded data to create an image on film, but modern systems record and process radar image data in digital form. With the launch of commercial radar imaging. Microsoft's process explorer, reports the exe as:"The Digital Line Detection program monitors the modem to make sure that the phone line is a standard analog phone line.
Plugging into a digital phone line could cause damage to the purpose of this application is to provide a warning before damage occurs." drWireMore: AFAIK- serves no. As such the sole modem interface is a uncontrolled A/D convertor and timing recovery is asynchronous with the receiver A/D clock.
In addition, a polyphase filter interpolation timing recovery algorithm is modified and tested. The satellite modem applications involve filtered BPSK, filtered QPSK and 8-PSK with trellis coded modulation. A satellite modem or satmodem is a modem used to establish data transfers using a communications satellite as a relay.A satellite modem's main function is to transform an input bitstream to a radio signal and vice versa.
There are some devices that include only a demodulator (and no modulator, thus only allowing data to be downloaded by satellite) that are also referred to as "satellite modems. In the real-world, analog products detect signals such as sound, light, temperature or pressure and manipulate them.
Converters such as an Analog-to-Digital converter then take the real-world signal and turn it into the digital format of 1's and 0's. From here, the DSP takes over by capturing the digitized information and processing it.
Wiley, p. ISBN 10 ISBN 13 This book uses a practical approach in the application of theoretical concepts to digital communications in the design of software defined radio modems.
This book discusses the design. After provisioning the modem for high-speed services, what should you do to make sure the modem is provisioned correctly. C) Reboot the computer, open a browser, and go to a website to click through. When connecting coaxial cable to the embedded multimedia terminal adapter (EMTA) in a.
86 Digital Image Processing have been found to be most satisfactory than the photographic technique for image enhancement, because of the precision and wide variety of digital processes. Contrast Contrast generally refers to the difference in luminance or grey level values in an image and is an important characteristic.
It can be defined as the. This is an extremely useful book for any Digital Communication System designer or engineers who wish to develop digital transmitters and (especially) receivers for a given system.
Covers all aspects, including recent developments and classic algorithms used for synchronization of digital communication s: 4. _____ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.
Contention On digital circuits, we use _____ to reshape the incoming signal and prevent attenuation. amplifiers d. not needed for satellite-based networks. 11 of 36 History of DIP (cont) s: Improvements in computing technology and the onset of the space race led to a surge of work in digital image processing – Computers used to.
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Whether used for managing trucks, fishing vessels or oil and gas equipment, the IDP series facilitates improved asset visibility, increased productivity, [ ]. • Feature detector • Hypothesizer • Hypothesis verifier A block diagram showing interactions and information flow among different components of the system is given in Figure I.
The model database contains all the models known to the system. The information in the model database depends on the approach used for the recognition.
4–13 Detector Circuits Envelope Detector, Product Detector, Frequency Modulation Detector, 4–14 Phase-Locked Loops and Frequency Synthesizers 4–15 Direct Digital. Digital modulation methods. In digital modulation, an analog carrier signal is modulated by a discrete signal.
Digital modulation methods can be considered as digital-to-analog conversion and the corresponding demodulation or detection as analog-to-digital conversion.
The changes in the carrier signal are chosen from a finite number of M alternative symbols (the modulation alphabet).Introduction to digital communication called a modulator) processes the binary sequence for transmission over the channel. The channel decoder (demodulator) recreates the incoming binary sequence (hopefully As another example, a modem consists of an input module (a modulator) and an output module (a demodulator).
The modulator receives.Modem manufacturers therefore offer different data compression as well as error-detection and -correction schemes.
Unless one is operating with identical schemes used in both modems, the error-detection and -correction process will generate errors. Two sets of standardized schemes are in general use. One scheme is the V international.