Editorial
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Editorial ` Affes Sofiene Institut National de la Recherche Scientifique (INRS-EMT), Universit´e du Qu´ebec, 800 de la Gaucheti`ere Ouest, bureau 6900, Montreal, QC, Canada H5A 1K6 Email: aff[email protected]
Jacob Benesty Institut National de la Recherche Scientifique (INRS-EMT), Universit´e du Qu´ebec, 800 de la Gaucheti`ere Ouest, bureau 6900, Montreal, QC, Canada H5A 1K6 Email: [email protected]
David Gesbert Institut Eur´ecom, 2229 route des Crˆetes, BP 193, 06904 Sophia Antipolis Cedex, France Email: [email protected]
Laurence Mailaender Bell Laboratories, Lucent Technologies, Room R-139, 791 Holmdel Road, Holmdel, NJ 07733, USA Email: [email protected]
Mamoru Sawahashi Wireless Access Laboratory, Wireless Laboratories, NTT DoCoMo, 3-5 Hikarinooka, Yokosuka, Kanagawa 239-8536, Japan Email: [email protected]
Current research in wireless transceiver design will extend wireless system performance beyond the capabilities of thirdgeneration (3G) systems. Yet the prospective innovative solutions that are most likely to make their shortest way to integration in a future real-world wireless system are those that take into account interaction with other subsystem components, any source of imperfection such as estimation and modeling errors, implementation feasibility and costs, software/hardware codesign issues, and so forth to the proof of concept. This special issue has solicited original research contributions in the design of new transceiver solutions for wireless networks beyond 3G with a development and assessment approach oriented towards implementation and integration in a real-world wireless system, that is, the methodology ranging from (i) realistic link/system-level software simulation, to (ii) off-line verification and validation over channel measurements, (iii) real-time prototyping and validation, and (iv) on-air demonstration and field trials. The papers included in this special issue address a broad range of topics such as MIMO (multiple-input multipleoutput) systems, space-time coding (STC), multiuser detection and interference suppression, synchronization and
channel identification, and so forth applied in most cases to code-division multiple access (CDMA), wideband CDMA (WCDMA), high-speed downlink packet access (HSDPA), or multicarrier CDMA (MC-CDMA). A relatively large number of contributions also come from industry and hence provide an invaluable industrial perspective on current research issues in wireless. In the following, the specific contributions of the papers included in this special issue are summarized and grouped according to the adopted methodology. Simulation-based performance evaluation with system-design approach Maljevi´c and Sousa introduce a new paradigm in the design of DS-CDMA receivers that mixes analog and digital processing based on a five-port device to achieve direct conversion and analog despreading with symbol-rate sampling only. They also exploit the five-port device to propose a noncoherent code-tracking scheme and a RAKE combiner fo
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