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Dissertation
Modeling and evaluation of fiber-fed microcellular systems
Doctor of Philosophy (Ph.D.), Drexel University
1997
DOI:
https://doi.org/10.17918/00007760
Abstract
The demands of the burgeoning mobile traffic, coupled with the scarcity of spectral resources, has led to the saturation of the conventional (Macrocells) cellular systems. In this regard, the concept of cell-splitting was proposed to enhance the system capacity, and has resulted in the microcellular systems. The optical fiber, due to its large bandwidth and low-loss, has been proposed to facilitate the low-cost deployment of microcells. Due to its flexibility and simplicity, the subcarrier multiplexing scheme (SCM) has been proposed as the mode of optical transport of the RF signals. The effects of fading and other nondeterministic phenomena in the wireless channel, mandate a very high dynamic range of the optical link in the uplink (mobile to base station). However, SCM-based systems are limited in their dynamic range due to the presence of nonlinearities (NLs) in the optical link. Therefore, it is imperative that any feasibility-study of the fiber-optic microcellular (FOM) systems consider the statistical effects of the wireless channel and the NLs in the lightwave link. The modeling and evaluation of FOM systems is presented from a bit error rate (BER) and probability of outage point of view. The models quantitatively predict the effects of the NLs of the optical link and the time-variant multipath nature of the wireless channel. Spread-spectrum techniques are proposed and investigated to alleviate the system impairments.
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Details
- Title
- Modeling and evaluation of fiber-fed microcellular systems
- Creators
- Binu John Koshy
- Contributors
- P. Mohana Shankar (Advisor) - Drexel University, Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xi, 139 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991021888782704721