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Communications Magazine, IEEE

Issue 8 • Date Aug. 2003

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Displaying Results 1 - 23 of 23
  • Wireless Local Area Networks: The New Wireless Revolution [Book Review]

    Publication Year: 2003, Page(s):8 - 10
    Cited by:  Papers (4)
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    Freely Available from IEEE
  • In Memory of Walter E. Noller

    Publication Year: 2003, Page(s): 10
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    Freely Available from IEEE
  • Guest Editorial - Storage area networking

    Publication Year: 2003, Page(s):70 - 71
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    Freely Available from IEEE
  • Guest editorial - Capacity approaching codes, iterative decoding algorithms, and their applications

    Publication Year: 2003, Page(s):100 - 101
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • Guest editorial - Topics in circuits for communications series: analog and digital circuits for wireless communications

    Publication Year: 2003, Page(s):142 - 143
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    Freely Available from IEEE
  • Integrated circuits for channel coding in 3G cellular mobile wireless systems

    Publication Year: 2003, Page(s):150 - 159
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB) | HTML iconHTML

    Error control coding is a key element of any digital wireless communication system, minimizing the effects of noise and interference on the transmitted signal at the physical layer. In 3G mobile cellular wireless systems, error control coding must accommodate both voice and data users, whose requirements vary considerably in terms of latency, throughput, and the impact of errors on the user applic... View full abstract»

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  • Design and implementation of an all-CMOS 802.11a wireless LAN chipset

    Publication Year: 2003, Page(s):160 - 168
    Cited by:  Papers (26)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB) | HTML iconHTML

    The tremendous growth in wireless LANs has generated interest in technologies that provide higher data rates and greater system capacities. The IEEE 802.11a standard, based on coded OFDM modulation, provides nearly five times the data rate and at least 20 times the overall system capacity compared to the incumbent 802.11b wireless LAN systems. This article describes the design challenges and circu... View full abstract»

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  • Forward high-speed wireless packet data service in IS-2000 - 1×EV-DV

    Publication Year: 2003, Page(s):170 - 177
    Cited by:  Papers (27)  |  Patents (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1338 KB) | HTML iconHTML

    This article describes enhancements to the physical layer design of single-carrier (1×) cdma2000® wireless networks introduced by Revision C of the IS-2000 standard (commonly referred to as 1×EV-DV). These improvements are mainly for the support of high-speed wireless packet data service on the forward (base station to mobile station) link. A new shared channel, the forw... View full abstract»

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  • The renaissance of Gallager's low-density parity-check codes

    Publication Year: 2003, Page(s):126 - 131
    Cited by:  Papers (88)  |  Patents (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1055 KB) | HTML iconHTML

    LDPC codes were invented in 1960 by R. Gallager. They were largely ignored until the discovery of turbo codes in 1993. Since then, LDPC codes have experienced a renaissance and are now one of the most intensely studied areas in coding. In this article we review the basic structure of LDPC codes and the iterative algorithms that are used to decode them. We also briefly consider the state of the art... View full abstract»

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  • Concatenated convolutional codes with interleavers

    Publication Year: 2003, Page(s):102 - 109
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1223 KB) | HTML iconHTML

    This article presents a tutorial overview of the class of concatenated convolutional codes with interleavers, also known as turbo-like codes. They are powerful codes, formed by a number of encoders connected through interleavers, endowed by a decoding algorithm that splits the decoding burden into separate decoding of each individual code. Refinement of successive estimates of the information sequ... View full abstract»

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  • Iterative decoder architectures

    Publication Year: 2003, Page(s):132 - 140
    Cited by:  Papers (28)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1245 KB) | HTML iconHTML

    Implementation constraints on iterative decoders applying message-passing algorithms are investigated. Serial implementations similar to traditional microprocessor datapaths are compared against architectures with multiple processing elements that exploit the inherent parallelism in the decoding algorithm. Turbo codes and low-density parity check codes, in particular, are evaluated in terms of the... View full abstract»

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  • RF CMOS transceivers for cellular telephony

    Publication Year: 2003, Page(s):144 - 149
    Cited by:  Papers (21)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1607 KB) | HTML iconHTML

    This article describes system and circuit issues related to cellular transceivers, presenting design techniques that have provided high performance in CMOS technology. Following an overview of relevant GSM and WCDMA specifications, the article identifies four trends in RF design that have continued to improve the performance. Examples of CMOS transceivers, and circuit and device concepts are then ... View full abstract»

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  • An introduction to optical burst switching

    Publication Year: 2003, Page(s):S10 - S15
    Cited by:  Papers (80)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1182 KB) | HTML iconHTML

    Optical burst switching is a promising solution for all-optical WDM networks. It combines the benefits of optical packet switching and wavelength routing while taking into account the limitations of the current all-optical technology. In OBS, the user data is collected at the edge of the network, sorted based on a destination address, and grouped into variable sized bursts. Prior to transmitting a... View full abstract»

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  • Object-based storage

    Publication Year: 2003, Page(s):84 - 90
    Cited by:  Papers (97)  |  Patents (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1435 KB) | HTML iconHTML

    Storage technology has enjoyed considerable growth since the first disk drive was introduced nearly 50 years ago, in part facilitated by the slow and steady evolution of storage interfaces (SCSI and ATA/IDE). The stability of these interfaces has allowed continual advances in both storage devices and applications, without frequent changes to the standards. However, the interface ultimately determi... View full abstract»

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  • Features of the iSCSI protocol

    Publication Year: 2003, Page(s):72 - 75
    Cited by:  Papers (13)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (661 KB) | HTML iconHTML

    The iSCSI protocol specifies how to access SCSI storage devices over a TCP network. In this article we give a brief introduction to the iSCSI protocol and a brief comparison with alternative technologies. We then discuss the basic features of the iSCSI protocol: sessions, naming, discovery, security, data placement, and recovery. View full abstract»

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  • Routing and wavelength assignment vs. wavelength converter placement in all-optical networks

    Publication Year: 2003, Page(s):S22 - S28
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1533 KB) | HTML iconHTML

    Blocking has been the key performance index in the design of an all-optical network. Existing research demonstrates that an effective routing and wavelength assignment strategy and a proper wavelength converter placement algorithm are the two primary vehicles for improving the blocking performance. However, these two issues have largely been investigated separately in that the existing RWA algorit... View full abstract»

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  • Codes defined on graphs

    Publication Year: 2003, Page(s):118 - 125
    Cited by:  Papers (30)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1337 KB) | HTML iconHTML

    Low-density parity-check codes, turbo codes, and indeed most practically decodable capacity-approaching error correcting codes can all be understood as codes defined on graphs. Graphs not only describe the codes, but, more important, they structure the operation of the sum-product decoding algorithm (or one of many possible variations), which can be used for iterative decoding. Such coding schemes... View full abstract»

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  • The ten-year-old turbo codes are entering into service

    Publication Year: 2003, Page(s):110 - 116
    Cited by:  Papers (41)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1162 KB) | HTML iconHTML

    In the matter of channel coding and spectral efficiency, up to the invention of turbo codes, 3 dB or more stood between what the theory promised and what real systems were able to offer. This gap has now been removed, allowing communication systems to be designed with quasi-optimum performance. Ten years after the first publication on this new technique, turbo codes have commenced their practical ... View full abstract»

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  • Novel VOA using in-plane reflective micromirror and off-axis light attenuation

    Publication Year: 2003, Page(s):S16 - S20
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1503 KB) | HTML iconHTML

    A new off-axis light attenuation configuration combining with a movable reflective micromirror is proposed for variable optical attenuator (VOA) application. Comprehensive study of new comb drive actuators of a two-step structure is done to achieve large displacement of an actuated micromirror for VOA. The measured optical and electrical performances have proven this new design promising for pract... View full abstract»

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  • Standards update: routing for optical networks

    Publication Year: 2003
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    We focus on a component of the optical control plane: routing. We give a quick overview of what routing functionality can mean in the optical control plane and compare that with routing in IP networks. We also look at this functionality from the point of view of a carrier running an optical network. We point out some areas of potential disagreement and give an update of the status of optical routi... View full abstract»

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  • Secure group key management for storage area networks

    Publication Year: 2003, Page(s):92 - 99
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1696 KB) | HTML iconHTML

    Storage area networks offer high availability, reliability, and scalability, and are a promising solution for large-scale storage needs of many enterprises. As with any distributed storage system, a major design challenge for SANs is to provide secure storage, which implies data integrity and data confidentiality. In this article we propose a solution that addresses these core security requirement... View full abstract»

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  • Performance study of iSCSI-based storage subsystems

    Publication Year: 2003, Page(s):76 - 82
    Cited by:  Papers (9)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1371 KB) | HTML iconHTML

    iISCSI is emerging as an end-to-end protocol for transporting storage I/O block data over IP networks. By exploiting the ubiquitous Internet infrastructure, iSCSI greatly facilitates remote storage, remote backup, and data mirroring. This article evaluates the performance of two typical iSCSI storage subsystems by measuring and analyzing block-level I/O access performance and file-level access per... View full abstract»

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  • The optical network control plane: state of the standards and deployment

    Publication Year: 2003, Page(s):S29 - S34
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB) | HTML iconHTML

    The notion of an optical control plane has rapidly ascended from being a mere concept to a detailed set of protocol standards developed with broad industry participation. In this article we present a brief overview of optical control plane architecture and the associated protocols. We then examine the business drivers and inhibitors behind the optical control plane effort, the current state of the... View full abstract»

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Aims & Scope

IEEE Communications Magazine, considered by most to be their most important member benefit, provides timely information on all aspects of communications: monthly feature articles describe technology, systems, services, market trends, development methods, regulatory and policy issues, and significant global events.

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Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies