A study on propagation characteristics and interference of spread spectrum code division multiple access cellular radio systems.

by Kwok Ming Shan.Thesis (M.Phil.)--Chinese University of Hong Kong, 1995.Includes bibliographical references (leaves 102-[109]).Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Cellular Radio Systems --- p.3Chapter 1.2 --- Code Division Multiple Access (CDMA) --- p.7Chapter 1.2.1 --- Direct Sequence CDMA (DS-CDMA) --- p.8Chapter 1.2.2 --- Frequency Hopping CDMA (FH-GDMA) --- p.11Chapter 1.2.3 --- Time Hopping CDMA (TH-CDMA) --- p.12Chapter 1.3 --- Propagation Characteristics --- p.12Chapter 1.3.1 --- Signal Strength Prediction - Path Loss --- p.13Chapter 1.3.2 --- Signal Variability --- p.17Chapter 1.3.3 --- Delay Spread --- p.23Chapter 1.3.4 --- Coherence Bandwidth --- p.23Chapter 1.4 --- Power Control in Cellular Radio Systems --- p.24Chapter 1.4.1 --- Centralized Power Control --- p.24Chapter 1.4.2 --- Distributed Power Control --- p.25Chapter 1.4.3 --- CDMA Power Control --- p.29Chapter 2 --- Contributions --- p.39Chapter 3 --- ACI Analysis of the Reverse-Link --- p.41Chapter 3.1 --- Adjacent Cell Interference --- p.42Chapter 3.2 --- Adjacent Cell Interference Analysis --- p.43Chapter 3.2.1 --- Interference Analysis of Hexagonal Cells --- p.43Chapter 3.2.2 --- Interference Analysis of Circular Cell Structure --- p.47Chapter 3.3 --- Closed-form of Adjacent Cell Interference --- p.51Chapter 3.4 --- Generalization to Irregular Cell Structure --- p.54Chapter 3.5 --- Conclusions --- p.57Chapter 4 --- ACI Analysis of Reverse-Link with Log-normal Shadowing --- p.59Chapter 4.1 --- Interference with Shadowing --- p.59Chapter 4.2 --- Conclusions --- p.66Chapter 5 --- ACI Analysis of Microcell --- p.68Chapter 5.1 --- Propagation Characteristics of Microcellular Radio Systems --- p.69Chapter 5.2 --- CDMA Microcellular Radio Systems --- p.70Chapter 5.3 --- Results and Discussions --- p.74Chapter 5.4 --- Conclusions --- p.76Chapter 6 --- Outage Probability Analysis of Imperfect Power Control --- p.77Chapter 6.1 --- Fast Fading of Signal --- p.78Chapter 6.2 --- Imperfect Power Control in CDMA --- p.81Chapter 6.3 --- Conclusions --- p.85Chapter 7 --- Conclusions --- p.88Chapter 8 --- Examples of CDMA Cellular Radio Systems --- p.91Chapter 8.1 --- Qualcomm CDMA system --- p.91Chapter 8.1.1 --- Forward-link --- p.92Chapter 8.1.2 --- Reverse-link --- p.93Chapter 8.1.3 --- Reverse-Link Open-Loop Power Control --- p.94Chapter 8.1.4 --- Reverse-Link Closed-Loop Power Control --- p.95Chapter 8.1.5 --- Forward-Link Power Control --- p.96Chapter 8.2 --- Interdigital Broadband CDMA System --- p.96Appendix --- p.97Chapter A --- Derivation of the PDF of the fast fading signal power --- p.97Chapter B --- Derivation of the Mean-to-standard deviation ratio --- p.98Chapter C --- Acronyms --- p.100Bibliography --- p.10

A Cumulative Study of Performance Degrading Factors in a High Capacity Cellular Zone System

In high capacity cellular zone systems, cell size is reduced considerably: hence cells may be re-defined as microcells. The key point in microcell interference modeling is that the desired signal, as wall as co-channel interferers' signals should have different statistics. A microcell interference model that which provides different fading parameters to the concerned signals is used in this paper to evaluate various performance degrading factors. Outage probability and spectrum efficiency have been calculated. Various techniques to counteract the above mentioned interferences have been suggested

Integration of Hybrid Passive Optical Networks (PON) with Radio over Fiber (RoF)

A cost effective, robust, and high capacity access network necessitated to meet the mounting customer demands for bandwidth-desirous services. A remarkable evolution of access networks is observed both in wired and wireless, predominantly driven by ever-changing bandwidth requirements. A wireless connection releases the end user from the restrictions of a physical link to a network that results in mobility, flexibleness, and ease of use. Whereas, optical networks offer immense amount of bandwidth that appease the most bandwidth voracious customers compared to bandwidth limited wireless networks. The integration of wired and wireless domains in the access landscape that presents a technical analysis of optical architectures suitable to support radio over fiber (RoF) is the objective of this chapter. Investigate the main trends that drive the merger of fiber and wireless technologies in access networks. Moreover, study the primary terms and the particular transmission features of integrated fiber-radio links to form a well-defined classification of hybrid systems and techniques. This work also recognizes the major problems for realization of RoF systems and examines the limitation, advantages, and diversity of integrated RoF-PON technology

Adaptive Beamforming and Adaptive Modulation-Assisted Network Performance of Multiuser Detection-Aided FDD and TDD CDMA Systems

The network performance of a frequency division duplex and time division duplex (TDD) code division multiple access (CDMA)-based system is investigated using system parameters similar to those of the Universal Mobile Telecommunication System. The new call blocking and call dropping probabilities, the probability of low-quality access, and the required average transmit power are quantified both with and without adaptive antenna arrays (AAAs), as well as when subjected to shadow fading. In some of the scenarios investigated, the system’s user capacity is doubled with the advent of adaptive antennas. The employment of adaptive modulation techniques in conjunction with AAAs resulted in further significant network capacity gains. This is particularly so in the context of TDD CDMA, where the system’s capacity becomes poor without adaptive antennas and adaptive modulation owing to the high base station (BS) to BS interference inflicted as a consequence of potentially using all time slots in both the uplink and downlink of the emerging wireless Internet. Index Terms—Adaptive beamforming, adaptive modulation, code division multiple access (CDMA) systems, Universal Mobile Telecommunication System Terrestrial Radio Access (UTRA), wireless network performance