The Experts below are selected from a list of 5817 Experts worldwide ranked by ideXlab platform
H. Sari - One of the best experts on this subject based on the ideXlab platform.
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Variable Symbol-rate demodulators for cable and satellite TV broadcasting
IEEE Transactions on Broadcasting, 1996Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:We present the design and the basic features of Variable Symbol-rate demodulators for digital TV broadcasting by cable and satellite. The demodulators are fully compliant with the DVB recommendations which were later published as ETSI standards. The satellite demodulator employs the QPSK signal constellation and can handle Symbol rates up to 30 Mbaud. The cable demodulator is configurable to operate with all QAM signal formats from 16-QAM to 256-QAM, and handles Symbol rates up to 7 Mbaud which is the maximum possible Symbol rate in an 8 MHz channel. Both demodulators employ polyphase filtering for Variable Symbol rate operation and fully-digital carrier recovery loops with an extended frequency acquisition range. In addition, the cable demodulator includes a blind equalizer with smooth transition to a conventional adaptation algorithm after convergence.
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Variable Symbol-Rate Modem Design for Cable and Satellite TV Broadcasting
Information Technology: Transmission Processing and Storage, 1996Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:We present the design and basic features of Variable Symbol-rate modems for digital TV broadcasting by cable and satellite. The modems are fully compliant with the DVB recommendations which were later published as ETSI standards. The satellite modem employs the QPSK signal constellation and can handle Symbol rates up to 30 Mbaud. The cable modem is configurable to operate with all QAM signal formats from 16-QAM to 256-QAM, and handles Symbol rates up to 7 Mbaud which is the maximum possible Symbol rate in an 8 MHz channel. Both modems employ polyphase filtering for Variable Symbol rate operation and fully-digital carrier recovery loops with an extended frequency acquisition range. In addition, the cable modem includes a blind equalizer with smooth transition to a conventional adaptation algorithm after convergence.
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Design and performance of a Variable-rate QAM modem for digital cable television
International Broadcasting Conference IBC '95, 1995Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:The paper presents the design and performance of a quadrature amplitude modulation (QAM) modem for digital cable TV broadcasting. The modem fully complies with the European DVB standard and includes a number of additional features. The most distinctive feature is that this fully-digital modem offers a Variable Symbol rate and handles all modulation schemes from 16-QAM up to 256-QAM. It also includes a powerful blind equalizer and a carrier synchronization technique with extended frequency acquisition capability that allows one to use low-cost tuners and analog front-ends. The authors present the architecture of the modem and discuss its performance.
Wanbin Tang - One of the best experts on this subject based on the ideXlab platform.
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a Variable Symbol duration based ftn signaling scheme for pls
International Conference on Wireless Communications and Signal Processing, 2019Co-Authors: Jianquan Wang, Wanbin TangAbstract:Physical layer security (PLS) has become an urgent issue as the growing importance of the information security. In this paper, a Variable Symbol duration based faster-than-Nyquist (FTN) signaling scheme for PLS is proposed. The information rates of the cooperative link and the uncooperative link are derived. The positivity of the secrecy rate of the cooperative link is proved. Numerical results show that the cooperative link has higher information rate than the uncooperative link, the optimal secrecy rate corresponds to a certain $E_{b}/N_{0}$ and the bigger the difference of the Symbol duration is, the higher the secrecy rate will be for the cooperative link.
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WCSP - A Variable Symbol Duration Based FTN Signaling Scheme for PLS
2019 11th International Conference on Wireless Communications and Signal Processing (WCSP), 2019Co-Authors: Jianquan Wang, Wanbin TangAbstract:Physical layer security (PLS) has become an urgent issue as the growing importance of the information security. In this paper, a Variable Symbol duration based faster-than-Nyquist (FTN) signaling scheme for PLS is proposed. The information rates of the cooperative link and the uncooperative link are derived. The positivity of the secrecy rate of the cooperative link is proved. Numerical results show that the cooperative link has higher information rate than the uncooperative link, the optimal secrecy rate corresponds to a certain $E_{b}/N_{0}$ and the bigger the difference of the Symbol duration is, the higher the secrecy rate will be for the cooperative link.
G. Karam - One of the best experts on this subject based on the ideXlab platform.
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Variable Symbol-rate demodulators for cable and satellite TV broadcasting
IEEE Transactions on Broadcasting, 1996Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:We present the design and the basic features of Variable Symbol-rate demodulators for digital TV broadcasting by cable and satellite. The demodulators are fully compliant with the DVB recommendations which were later published as ETSI standards. The satellite demodulator employs the QPSK signal constellation and can handle Symbol rates up to 30 Mbaud. The cable demodulator is configurable to operate with all QAM signal formats from 16-QAM to 256-QAM, and handles Symbol rates up to 7 Mbaud which is the maximum possible Symbol rate in an 8 MHz channel. Both demodulators employ polyphase filtering for Variable Symbol rate operation and fully-digital carrier recovery loops with an extended frequency acquisition range. In addition, the cable demodulator includes a blind equalizer with smooth transition to a conventional adaptation algorithm after convergence.
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Variable Symbol-Rate Modem Design for Cable and Satellite TV Broadcasting
Information Technology: Transmission Processing and Storage, 1996Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:We present the design and basic features of Variable Symbol-rate modems for digital TV broadcasting by cable and satellite. The modems are fully compliant with the DVB recommendations which were later published as ETSI standards. The satellite modem employs the QPSK signal constellation and can handle Symbol rates up to 30 Mbaud. The cable modem is configurable to operate with all QAM signal formats from 16-QAM to 256-QAM, and handles Symbol rates up to 7 Mbaud which is the maximum possible Symbol rate in an 8 MHz channel. Both modems employ polyphase filtering for Variable Symbol rate operation and fully-digital carrier recovery loops with an extended frequency acquisition range. In addition, the cable modem includes a blind equalizer with smooth transition to a conventional adaptation algorithm after convergence.
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Design and performance of a Variable-rate QAM modem for digital cable television
International Broadcasting Conference IBC '95, 1995Co-Authors: G. Karam, K. Maalej, V. Paxal, H. SariAbstract:The paper presents the design and performance of a quadrature amplitude modulation (QAM) modem for digital cable TV broadcasting. The modem fully complies with the European DVB standard and includes a number of additional features. The most distinctive feature is that this fully-digital modem offers a Variable Symbol rate and handles all modulation schemes from 16-QAM up to 256-QAM. It also includes a powerful blind equalizer and a carrier synchronization technique with extended frequency acquisition capability that allows one to use low-cost tuners and analog front-ends. The authors present the architecture of the modem and discuss its performance.
Jianquan Wang - One of the best experts on this subject based on the ideXlab platform.
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a Variable Symbol duration based ftn signaling scheme for pls
International Conference on Wireless Communications and Signal Processing, 2019Co-Authors: Jianquan Wang, Wanbin TangAbstract:Physical layer security (PLS) has become an urgent issue as the growing importance of the information security. In this paper, a Variable Symbol duration based faster-than-Nyquist (FTN) signaling scheme for PLS is proposed. The information rates of the cooperative link and the uncooperative link are derived. The positivity of the secrecy rate of the cooperative link is proved. Numerical results show that the cooperative link has higher information rate than the uncooperative link, the optimal secrecy rate corresponds to a certain $E_{b}/N_{0}$ and the bigger the difference of the Symbol duration is, the higher the secrecy rate will be for the cooperative link.
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WCSP - A Variable Symbol Duration Based FTN Signaling Scheme for PLS
2019 11th International Conference on Wireless Communications and Signal Processing (WCSP), 2019Co-Authors: Jianquan Wang, Wanbin TangAbstract:Physical layer security (PLS) has become an urgent issue as the growing importance of the information security. In this paper, a Variable Symbol duration based faster-than-Nyquist (FTN) signaling scheme for PLS is proposed. The information rates of the cooperative link and the uncooperative link are derived. The positivity of the secrecy rate of the cooperative link is proved. Numerical results show that the cooperative link has higher information rate than the uncooperative link, the optimal secrecy rate corresponds to a certain $E_{b}/N_{0}$ and the bigger the difference of the Symbol duration is, the higher the secrecy rate will be for the cooperative link.
Hwangjun Song - One of the best experts on this subject based on the ideXlab platform.
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An effective mesh-pull-based P2P video streaming system using Fountain codes with Variable Symbol sizes
Computer Networks, 2011Co-Authors: Hwangjun SongAbstract:In this paper, we propose an effective mesh-pull-based video streaming system over P2P networks using Fountain codes with Variable Symbol sizes for video-on-demand services. The goal of the proposed system is to provide a stable video streaming service of high quality with minimum computational complexity and a short initial latency over P2P networks. Basically, Fountain codes are adopted in the proposed system to simplify the handshaking procedure, which causes a large initial latency, and to support a robust video streaming service despite packet losses. The proposed Fountain encoding mechanism works by using feedback information to reduce unnecessary encoded Symbol generation. In addition, the Fountain code Symbol size is continuously adjusted to minimize additional computational overhead required for Fountain encoding/decoding. The proposed system is fully implemented in software and examined over an Internet environment.
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ICCCN - Mesh-Pull-Based P2P Video Streaming System Using Fountain Codes
2011 Proceedings of 20th International Conference on Computer Communications and Networks (ICCCN), 2011Co-Authors: Hwangjun SongAbstract:In this work, we propose a simple but effective mesh-pull-based P2P video streaming system using Fountain codes with Variable Symbol sizes for video-on-demand services. The goal of the proposed system is to provide a stable video streaming service of high quality with a low computational complexity and short initial latency. Fountain codes are adopted in the proposed system to simplify the handshaking procedure which causes a large initial latency, and to support a robust video streaming service. The proposed system works by using feedback information to reduce unnecessary encoded Symbol generation. In addition, the Fountain code Symbol size is continuously adjusted to minimize additional computational overhead required for Fountain encoding/decoding.
