February 2005
Vol.43 No.2
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February 2005IEEE Optical Communications |
A quarterly supplement appearing in
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Multiple Access Technologies for B3G Wireless Communications |
| Hsiao-Hwa Chen, Mohsen Guizani, and Josef Franz Huber |
Interference-Free Broadband Single- and Multicarrier DS-CDMA
The IFW duration may be extended with the advent of multicarrier DS-CDMA proportionately to the number of subcarriers. The resultant MC DS-CDMA system is capable of exhibiting near-single-user performance without a multi-user detector.
H. Wei, L.-L. Yang, and L. Hanzo, Univ. of SouthamptonCS-OFDMA: A New WirelessCDD Physical Layer Scheme
A proposed new innovative wireless CDD physical layer scheme for 4G called CS-OFDMA is introduced. Code spreading uses a set of smart codes with its meritorious properties, which can eliminate multipath and multi-user interferences.
William C. Y. Lee, LinkAir Communications, Inc.Ultra-Wideband for Multiple Access Communications
The authors address a number of challenges in UWB receiver design, such as capturing multipath energy, intersymbol interference especially in a non-line-of- sight environment, and the need for high-sampling-rate analog-to-digital converters.
Robert C. Qiu, Tennessee Tech University; Huaping Liu, Oregon State University; Xuemin (Sherman) Shen, University of WaterlooA Time-Orthogonal CDMA High-Speed Uplink Data Transmission Scheme for3G and Beyond
The author presents a new time-orthogonal CDMA approach called high-speed uplink data burst transmission mode. The concept is based on slot-synchronized slot-orthogonal transmissions whereby high-speed data transmissions take place in slots orthogonal to the slots used for physical layer control signaling and low-data- rate transmission such as resource requests.
Farooq Khan, Bell Laboratories — Lucent TechnologiesPerspectives for Present and Future CDMA-Based Communications Systems
The authors present and describe the main boosters of future CDMA communication systems in order to highlight methods to cope with the more challenging requirements of future systems and services.
Romano Fantacci, Francesco Chiti, Dania Marabissi, Giada Mennuti, Simone Morosi, and Daniele Tarchi, Università di FirenzeA High-PerformanceMIMO OFDM Wireless LAN
Data rates in WWANs continue to lag advances in wireless local area networks by orders of magnitude. There are valuable lessons to be learned from the design of WLANs that provide data rates in excess of hundreds of megabits per second.
Sanjiv Nanda, Rod Walton, John Ketchum, Mark Wallace, and Steven Howard, Qualcomm, Inc.A Tutorial on Multiple Access Technologies for Beyond 3G Mobile Networks
The authors review fundamental technical concepts of the main multiple access schemes for wireless mobile systems, and they propose a path for development of appropriate multiple access technologies for next-generation mobile networks.
Abbas Jamalipour, University of Sydney; Tadahiro Wada, Shizuoka University; Takaya Yamazato, Nagoya UniversityMIMO MC–CDMA Communications for Future Cellular Systems
The authors propose an efficient multiple-input multiple-output concept based on space-time turbo coded modulation and layered spatial multiplexing architectures for cellular multicarrier code-division multiple access systems.
Markku Juntti, Mikko Vehkapera, Jouko Leinonen, Zexian Li, and Djordje Tujkovic, University of Oulu; Shigehiko Tsumura and Shinsuke Hara, Osaka University
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Broadband Access Varieties |
| Steve Gorshe and Zdzislaw Papir |
Broadband Wireless Access with WiMax/8O2.16: Current Performance Benchmarks and Future Potential
The IEEE 802.16 family of standards and its associated industry consortium, WiMax, promise to deliver high data rates over large areas to a large number of users in the near future. This exciting addition to current broadband options such as DSL, cable, and WiFi promises to rapidly provide broadband access to locations in the world’s rural and developing areas where broadband is currently unavailable, as well as compete for urban market share.
Arunabha Ghosh and David R. Wolter, SBC Laboratories Inc.; Jeffrey G. Andrews and Runhua Chen, The University of Texas at AustinOn the Role of Future High-Frequency BFWA Systems in Broadband Communication Networks
Frequencies above 25 GHz represent a great opportunity for BFWA systems because of the extraordinary bandwidths available. But standards for high-frequency BFWA published so far have not been able to unleash this potential.
Isabelle Tardy and Ole Grøndalen, Telenor R&DMedia Access Control for Ethernet Passive Optical Networks: An Overview
Medium access control is one of the crucial issues in the design of Ethernet passive optical networks. To ensure efficient transmission, an EPON system must employ a MAC mechanism to arbitrate access to the shared medium in order to avoid data collisions in the upstream direction and at the same time efficiently share the upstream transmission bandwidth among all ONUs.
Jun Zheng and Hussein T. Mouftah, University of Ottawa
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Standards Topics |
A Standard's Integrity: Can It Be Safeguarded?
When a compatibility standard is adapted, extended, or selectively implemented, its purpose is likely to be undermined. Its value declines because interoperability between standard-compliant implementations becomes uncertain. The integrity of the standard is at stake. This article discusses strategies intended to safeguard standards’ integrity. The examples are set in the context of the development of Java, a de facto standard.
Tineke M. Egyedi, Delft University of Technology; John Hudson, Bath University