tailieunhanh - Báo cáo hóa học: " Andreas Czylwik Department of Communication Systems, University of Duisburg-Essen"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Andreas Czylwik Department of Communication Systems, University of Duisburg-Essen | EURASIP Journal on Applied Signal Processing 2004 9 1189-1190 2004 Hindawi Publishing Corporation Editorial Andreas Czylwik Department of Communication Systems University of Duisburg-Essen 47048 Duisburg Germany Em ail czylwik@ Alex B. Gershman Department of Electrical and Computer Engineering McMaster University Hamilton Canada L8S 4K1 Email gershman@ Thomas Kaiser Department of Communication Systems Faculty of Engineering University of Duisburg-Essen 47048 Duisburg Germany Email Smart antennas have recently emerged as a key technology for third 3G and higher generations of wireless communication systems. They are able to add a new spatial dimension on top of the currently used time frequency and code multiple access schemes. The past of 3G wireless systems licensing process in Europe has shown that spectral bandwidth may cost wireless system providers billions of Euros. In light of this fact smart antennas offer an elegant and relatively inexpensive opportunity of increasing data rate system capacity and flexibility and quality of service. Today developments and progress in this area are still away from cost-efficient practical implementations and further theoretical and experimental studies are crucial to enable successful applications of smart antennas in the future. The aim of this special issue is to present recent advances of the smart antenna research. The contributions cover a broad range of topics. We classified them into three major categories namely link level system level and applications. The first ten papers of the issue are related to the linklevel study of smart antennas. In the paper by Meurer et al. the MIMO transmitter design approach with a priori given structure of the receiver the so-called receiver-oriented design scheme is compared to the case when the MIMO receiver design is performed for a fixed transmitter structure the so-called transmitter-oriented design scheme . The paper by