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Digital communications over non-fading and fading channels

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Author
Hernandez, Jose H.
Date
2008-09
Advisor
Robertson, Clark R.
Second Reader
Kragh, Frank
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Abstract
The objective of this thesis is to enhance the ability of the Improved Many-on-Many (IMOM) software package to analyze modern digital communication systems using available intelligence. Currently, IMOM can only be used to analyze analog communication systems, but modern systems are, increasingly digital. In this thesis, the probability of bit error expressions for many common digital modulation techniques, both binary and non-binary, are inverted to obtain expressions for the required signal-to-noise ratio as a function of probability of channel bit error. Furthermore, results are obtained not only for a non-fading channel but for channels modeled as either Rayleigh or Ricean. These equations can be implemented in IMOM to increase the accuracy of the link budget analysis when the specific modulation type being evaluated is known. This thesis takes the approach of determining probability of channel bit error rather than information bit error, which allows generic solutions independent of the specifics of the system under investigation as long as the particular modulation type is known. When even greater accuracy is desired, system specifics such as the type of error control coding must be taken into account. As an example of this, the Joint Tactical Information Distribution System (JTIDS) is considered.
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http://hdl.handle.net/10945/3899
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    Digital communications over fading channels 

    Beltz, Nathan E.; Robertson, R. Clark (Monterey, California. Naval Postgraduate School, 2004); NPS-EC-05-002
    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 ...
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    Performance analysis of wireless LAN signals transmitted over a ricean fading channel in a pulsed-noise preference environment 

    Spyrou, Evangelos (Monterey California. Naval Postgraduate School, 2004-09);
    This thesis examines the performance of the waveforms specified by the IEEE 802.11a wireless local area network standard when the signal is transmitted over a Ricean fading channel with AWGN and pulsed-noise interference. ...
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    Performance analysis of a JTIDS/link-16-type waveform transmitted over slow, flat Nakagami fading channels in the presence of narrowband interference 

    Kao, Chi-Han (Monterey, California. Naval Postgraduate School, 2008., 2008-12);
    Link-16 is a tactical data link currently employed by the United States Navy, the Joint Services, and forces of North Atlantic Treaty Organization. It provides presumably secure and jam-resistant tactical information for ...
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