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Signal Processing Magazine, IEEE

Issue 6 • Date Nov. 2004

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Displaying Results 1 - 23 of 23
  • Dates ahead

    Page(s): 86
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  • Pilot-assisted wireless transmissions: general model, design criteria, and signal processing

    Page(s): 12 - 25
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    Pilot-assisted transmission (PAT) multiplexes the known symbols with the information bearing data. These pilot symbols and the specific multiplexing scheme are known at the receiver and can be exploited for channel estimation, receiver adaptation, and optimal decoding. Even though PAT has been used for many practical reasons, there still remains a need for an optimal design. The theory and methodology for the design of an optimal PAT have emerged, but much still remains unknown. In this article, the author has presented an overview of PAT. A general PAT model is given as well as the review of the common design criteria. The information theoretic and signal processing issues were also discussed. View full abstract»

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  • Beginnings: the first hardware digital filters

    Page(s): 55 - 81
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    The article narrates the beginnings of the first digital hardware filters based from the author's historical perspective. It all began when the author was assigned to design and build an all-digital touch-tone receiver (TTR). In the course of analysis and experimentation, a new and exciting area of digital filtering that is largely based on earlier results from the field of sampled-data control system was discovered. View full abstract»

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  • Computational functional genomics

    Page(s): 62 - 69
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    The exponential growth of the publicly available data has transformed biology into an information rich science that provides new and interesting applications for the machine learning community. In this article, the author presents some specific examples regarding the possibility of representing biological data in a machine-learning framework as well as the contributions these representations impart to both the prediction and discovery of the biological function. The paper also illustrates the proper feature selection critical to the success of the of a particular computational functional genomics approach. View full abstract»

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  • Society news

    Page(s): 6
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  • New Products

    Page(s): 82 - 84
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  • Speech-centric multimodal interfaces

    Page(s): 76 - 81
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1552 KB)  

    Benefiting from the knowledge of speech, language, and hearing, a new technology has arisen to serve the users with complex information systems. This technology aims for a natural communication environment, capturing the attributes that humans favor in face-to-face exchange. Conversational interaction bears a central burden, with visual and manual signaling simultaneously supplementing the communication process. In addition to instrumenting the sensors for each mode, the interface must incorporate the context-aware algorithms in fusing and interpreting the multiple sensory channels. The ultimate objective is a reliable estimate of the user's intent, from which actionable responses can be made. The current research therefore addresses the multi-modal interfaces that can transcend from the limitations of the mouse and the keyboard. This report indicates the early status of the multimodal interfaces and identifies the emerging opportunities for enhanced usability and naturalness. It concludes by advocating the focused research on a frontier issue - the formulation of a quantitative language framework for multimodal communication. View full abstract»

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  • Ultra-wideband communications: an idea whose time has come

    Page(s): 26 - 54
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    Ultra-wideband (UWB) radio is a fast emerging technology with many unique attractive features that promotes major advances in wireless communications, networking, radar, imaging, and positioning systems. Research in UWB is still in its infancy stages, offering limited resources in handling the challenges facing the UWB communications. Understanding the unique properties and challenges of UWB communications as well as its application in competent signal processing techniques are vital in conquering the obstacles towards developing exciting UWB applications. UWB research and development has to cope with the challenges that limit their performance, capacity, throughput, network flexibility, implementation complexity, and cost. This tutorial focuses on UWB wireless communications at the physical layer. It overviews the state-of-the-art UWB in channel modeling, transmitters, and receivers of UWB radios, and outlines the research directions and challenges that needs to be overcome. Since a signal processing expertise is expected to have major impact in research and development of UWB systems, emphasis is placed on the DSP aspects. View full abstract»

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  • Ask me again in ten years!

    Page(s): 8 - 11
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  • JPEG2000 - choices and tradeoffs for encoders

    Page(s): 70 - 75
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    A new and improved image coding standard, called JPEG2000, has been developed. JPEG2000 is the state-of-the-art image coding standard that results from the joint efforts of the International Standards Organization (ISO) and the International Telecommunications Union. In this article, we describe the most important parameters of this new standard and present several "tips and tricks" to help resolve the design tradeoffs that JPEG2000 application developers are likely to encounter in practice. The new standard outperforms the older JPEG standard by approximately 2 dB of peak signal-to-noise ratio (PSNR) for several images across all compression ratios. The JPEG2000's superiority from the previous standard largely depends on the standard's security aspects, interactive protocols and application program interfaces for network access, wireless transmission, wavelet transform, and embedded block coding with optimal truncation (EBCOT). View full abstract»

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  • Advertisers index

    Page(s): 88
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  • How can DNA computing be applied to digital signal processing?

    Page(s): 57 - 61
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    Although digital signals have been used as inputs in some DNA computing applications, there has been a small research regarding the application of DNA computing principles in solving DSP problems. This article offers a first step towards filling this gap and thus strengthening the ties between biology and signal processing. By focusing the attention of the article to a specific domain, the author believes that many new exciting applications of DNA computation can be discovered. A short overview of molecular biology and tools commonly used in DNA computing is also provided for presentation purposes. This article offers the signal processing community some future directions regarding the unexplored area of research in biocomputing technology. View full abstract»

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  • IEEE Signal Processing Magazine - Front cover

    Page(s): 0_1
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    Freely Available from IEEE
  • Table of contents - IEEE Signal Processing Magazine

    Page(s): 1
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    Freely Available from IEEE
  • European Association for Signal, Speech and Image Processing - 13th European Signal Processing Conference - Call for Papers

    Page(s): 5
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    Freely Available from IEEE
  • SPAWC 2005 Announcement

    Page(s): 7
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    Freely Available from IEEE
  • EURASIP book series on Signal Processing and Communication

    Page(s): 85
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    Freely Available from IEEE
  • Call for Papers - IEEE Signal Processing Magazine

    Page(s): 87
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    Freely Available from IEEE
  • 2004 Index IEEE Signal Processing Magazine Vol. 21 - Author Index

    Page(s): 89 - 91
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    Freely Available from IEEE
  • The IEEE Member Digital Library

    Page(s): 97
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    Freely Available from IEEE

Aims & Scope

IEEE Signal Processing Magazine publishes tutorial-style articles on signal processing research and applications, as well as columns and forums on issues of interest.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Min Wu
University of Maryland, College Park
United States 

http://www/ece.umd.edu/~minwu/