Digital communications over fading channels
Authors
Beltz, Nathan E.
Robertson, R. Clark
Subjects
Digital communications.
Modulation (Electronics)
Modulation (Electronics)
Advisors
Date of Issue
2004
Date
2004
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
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).
Type
Technical Report
Description
Series/Report No
Department
Organization
Electrical and Computer Engineering (ECE)
Graduate School of Engineering and Applied Science (GSEAS)
Identifiers
NPS Report Number
NPS-EC-05-002
Sponsors
Funder
Format
x, 92 p.: ill.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.