The Experts below are selected from a list of 165 Experts worldwide ranked by ideXlab platform
Athanassios Manikas - One of the best experts on this subject based on the ideXlab platform.
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Diffused Channel Estimation and Reception for Cyclic Prefix-free MC-CDMA Arrayed-MIMO Communication Systems
International Journal of Wireless Information Networks, 2008Co-Authors: Farrukh Rashid, Athanassios ManikasAbstract:An arrayed-MIMO communication system, which employs Antenna arrays at both ends of the wireless link is proposed to leverage upon spatial information such as directions-of-arrival to achieve an improvement in performance. This is in contrast with conventional MIMO systems, which typically assume multiple Independent Antenna elements at the transmitters and receivers. This paper focuses on an arrayed-MIMO communication system operating over a frequency selective fading channel and employs MC-CDMA as the modulation technique. However, in a departure from conventional MC-CDMA systems, cyclic prefixes or guard intervals are not used for the MC-CDMA system employed here so that valuable bandwidth is not wasted on cyclic prefixes or guard intervals. Localized scattering is assumed to occur for each multipath; hence the wireless channel is modelled as a diffused vector channel. A robust blind estimation method is presented to estimate the parameters of the spatially diffused channel, followed by reception based on these parameters. The feasibility of the proposed system is supported by simulation results.
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An investigative study of cyclic prefix-free MC-CDMA arrayed-MIMO communication systems
2007 2nd International Symposium on Wireless Pervasive Computing, 2007Co-Authors: Athanassios Manikas, Tjeng Thiang Tjhung, Wai-choong WongAbstract:An arrayed-MIMO communication system, which employs Antenna arrays at both ends of the wireless link, is proposed to leverage upon spatial information such as directions-of-arrival for achieving an improvement in performance. This is in contrast with conventional MIMO systems, which typically assume multiple Independent Antenna elements at the transmitters and receivers. This paper focuses on an arrayed-MIMO communication system operating over a frequency-selective fading channel and employs MC-CDMA as the modulation scheme. However, in a departure from conventional MC-CDMA systems, cyclic prefixes or guard intervals are not used for the MC-CDMA system employed here so that valuable bandwidth is not wasted on cyclic prefixes or guard intervals. The feasibility of the proposed system is supported by simulation results.
Wai-choong Wong - One of the best experts on this subject based on the ideXlab platform.
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An investigative study of cyclic prefix-free MC-CDMA arrayed-MIMO communication systems
2007 2nd International Symposium on Wireless Pervasive Computing, 2007Co-Authors: Athanassios Manikas, Tjeng Thiang Tjhung, Wai-choong WongAbstract:An arrayed-MIMO communication system, which employs Antenna arrays at both ends of the wireless link, is proposed to leverage upon spatial information such as directions-of-arrival for achieving an improvement in performance. This is in contrast with conventional MIMO systems, which typically assume multiple Independent Antenna elements at the transmitters and receivers. This paper focuses on an arrayed-MIMO communication system operating over a frequency-selective fading channel and employs MC-CDMA as the modulation scheme. However, in a departure from conventional MC-CDMA systems, cyclic prefixes or guard intervals are not used for the MC-CDMA system employed here so that valuable bandwidth is not wasted on cyclic prefixes or guard intervals. The feasibility of the proposed system is supported by simulation results.
Ching Cheng - One of the best experts on this subject based on the ideXlab platform.
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Fractal multiband Antennas based on lotus-pod patterns
Microwave and Optical Technology Letters, 2002Co-Authors: Dau-chyrh Chang, Chung-chi Chang, Ching ChengAbstract:A novel microstrip Antenna constructed with a lotus-pod pattern is presented in this Letter. It exhibits a frequency-Independent Antenna after a self-similar design. In practice, the multiband spectrum depends on the iteration of the fractal pattern. Both outward and inward iteration approaches are introduced. Experimental results with multiband spectrums and radiation patterns are presented and discussed. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 223–228, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10282
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Fractal multiband Antennas based on lotus-pods patterns
APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577), 2001Co-Authors: Dau-chyrh Chang, Chung-chi Chang, Ching ChengAbstract:A novel microstrip Antenna constructed with lotus-pods pattern is presented in this paper. It exhibits a frequency-Independent Antenna after a self-similar design. In practice, the multiband response dependents on the iteration of fractal pattern. Both outward and inward iteration approaches are introduced. Experimental results with multiband spectrums and array radiation patterns are presented and discussed.
Dau-chyrh Chang - One of the best experts on this subject based on the ideXlab platform.
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Fractal multiband Antennas based on lotus-pod patterns
Microwave and Optical Technology Letters, 2002Co-Authors: Dau-chyrh Chang, Chung-chi Chang, Ching ChengAbstract:A novel microstrip Antenna constructed with a lotus-pod pattern is presented in this Letter. It exhibits a frequency-Independent Antenna after a self-similar design. In practice, the multiband spectrum depends on the iteration of the fractal pattern. Both outward and inward iteration approaches are introduced. Experimental results with multiband spectrums and radiation patterns are presented and discussed. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 223–228, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10282
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Fractal multiband Antennas based on lotus-pods patterns
APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577), 2001Co-Authors: Dau-chyrh Chang, Chung-chi Chang, Ching ChengAbstract:A novel microstrip Antenna constructed with lotus-pods pattern is presented in this paper. It exhibits a frequency-Independent Antenna after a self-similar design. In practice, the multiband response dependents on the iteration of fractal pattern. Both outward and inward iteration approaches are introduced. Experimental results with multiband spectrums and array radiation patterns are presented and discussed.
Farrukh Rashid - One of the best experts on this subject based on the ideXlab platform.
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Diffused Channel Estimation and Reception for Cyclic Prefix-free MC-CDMA Arrayed-MIMO Communication Systems
International Journal of Wireless Information Networks, 2008Co-Authors: Farrukh Rashid, Athanassios ManikasAbstract:An arrayed-MIMO communication system, which employs Antenna arrays at both ends of the wireless link is proposed to leverage upon spatial information such as directions-of-arrival to achieve an improvement in performance. This is in contrast with conventional MIMO systems, which typically assume multiple Independent Antenna elements at the transmitters and receivers. This paper focuses on an arrayed-MIMO communication system operating over a frequency selective fading channel and employs MC-CDMA as the modulation technique. However, in a departure from conventional MC-CDMA systems, cyclic prefixes or guard intervals are not used for the MC-CDMA system employed here so that valuable bandwidth is not wasted on cyclic prefixes or guard intervals. Localized scattering is assumed to occur for each multipath; hence the wireless channel is modelled as a diffused vector channel. A robust blind estimation method is presented to estimate the parameters of the spatially diffused channel, followed by reception based on these parameters. The feasibility of the proposed system is supported by simulation results.
