The Experts below are selected from a list of 1698 Experts worldwide ranked by ideXlab platform
N. Cardona - One of the best experts on this subject based on the ideXlab platform.
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VTC Fall (2) - Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
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PIMRC - Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Comparison of capacity in downlink WCDMA systems using Soft Handover techniques with SIR-based power control and site selection diversity transmission
2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514), 2004Co-Authors: J. Reig, L. Rubio, N. CardonaAbstract:In this paper, downlink performance of WCDMA system with site selection diversity transmission power control (SSDT) during Soft Handover mode is analysed. Signal to interference ratio (SIR) power control techniques are modelled and used in simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using SSDT is compared to usual Soft Handover technique.
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Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
J. Reig - One of the best experts on this subject based on the ideXlab platform.
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VTC Fall (2) - Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
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PIMRC - Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Comparison of capacity in downlink WCDMA systems using Soft Handover techniques with SIR-based power control and site selection diversity transmission
2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514), 2004Co-Authors: J. Reig, L. Rubio, N. CardonaAbstract:In this paper, downlink performance of WCDMA system with site selection diversity transmission power control (SSDT) during Soft Handover mode is analysed. Signal to interference ratio (SIR) power control techniques are modelled and used in simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using SSDT is compared to usual Soft Handover technique.
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Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
Yue Chen - One of the best experts on this subject based on the ideXlab platform.
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Optimized downlink transmit power control during Soft Handover in WCDMA systems
2003 IEEE Wireless Communications and Networking 2003. WCNC 2003., 2003Co-Authors: Yue Chen, L. CuthbertAbstract:This paper proposes a new power control strategy during Soft Handover in WCDMA systems. According to the link qualities of the down link channels involved in Soft Handover, the transmit powers of the base stations in the active set are dynamically allocated. This new optimized power control scheme reduces the additional interference caused by the multiple site transmission during Soft Handover. Compared with the unbalanced and balanced power control scheme adopted by 3GPP, the proposed scheme shows better performance. It increases the downlink capacity and makes the whole system more robust to the fluctuating attenuation of the radio environment.
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WCNC - Optimized downlink transmit power control during Soft Handover in WCDMA systems
2003 IEEE Wireless Communications and Networking 2003. WCNC 2003., 2003Co-Authors: Yue Chen, Laurie CuthbertAbstract:This paper proposes a new power control strategy during Soft Handover in WCDMA systems. According to the link qualities of the down link channels involved in Soft Handover, the transmit powers of the base stations in the active set are dynamically allocated. This new optimized power control scheme reduces the additional interference caused by the multiple site transmission during Soft Handover. Compared with the unbalanced and balanced power control scheme adopted by 3GPP, the proposed scheme shows better performance. It increases the downlink capacity and makes the whole system more robust to the fluctuating attenuation of the radio environment.
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MWCN - Downlink performance of different Soft Handover algorithms in 3G multi-service environments
4th International Workshop on Mobile and Wireless Communications Network, 2002Co-Authors: Yue Chen, Laurie CuthbertAbstract:As a crucial technology for seamless communication, Soft Handover has been investigated in the literature since the emergence of CDMA.. In this paper, triggered by the asymmetric features of 3G Internet and multimedia services, the downlink performances of four typical Soft Handover algorithms: distance-based, IS-95A, UTRA Soft Handover algorithms and SSDT are evaluated and compared under various multi-service environments. Results show that the performance of different algorithms in terms of downlink information capacity depends closely on the Soft Handover overhead. It is also sensitive to the multi-service structure and the radio parameters such as shadow fading. By choosing proper Soft Handover algorithm and overhead, the downlink capacity can be improved.
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Soft Handover effects on downlink capacity-coverage trade-off in 3G WCDMA networks
Proceedings of SPIE, 2002Co-Authors: Yue Chen, Laurie CuthbertAbstract:It is well know that Soft Handover extends the coverage and increases uplink capacity in CDMA systems. Triggered by the asymmetric features of 3G Internet and multimedia services, in this paper, we analysed the Soft Handover effects on both downlink capacity and coverage. The relationship between the capacity and the coverage is also investigated. Results show that when the Soft Handover overhead is beyond a certain value, there is a trade-off between the capacity and coverage. We quantified and compared the Soft Handover effects on the capacity and the coverage with three different Soft Handover algorithms: distance-based, IS-95A, and UTRA algorithms. It is shown that, the performance of Soft Handover is closely related to the algorithm and parameters setting. Distance-based algorithm is not accurate for analysing coverage.
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Downlink Soft Handover gain in UMTS networks under different power control conditions
Third International Conference on 3G Mobile Communication Technologies, 2002Co-Authors: Yue Chen, Laurie CuthbertAbstract:In this paper, the downlink Soft Handover gain is analysed in UMTS networks under three different power control situations: without power control, with perfect power control and with imperfect power control. The results show that although power control in the downlink direction is not as crucial as it in the uplink direction, it does have a significant influence on the downlink Soft Handover gain. The downlink Soft Handover gain will be overestimated without considering the power control and underestimated without considering the imperfection of the power control process.
L. Cuthbert - One of the best experts on this subject based on the ideXlab platform.
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Optimized downlink transmit power control during Soft Handover in WCDMA systems
2003 IEEE Wireless Communications and Networking 2003. WCNC 2003., 2003Co-Authors: Yue Chen, L. CuthbertAbstract:This paper proposes a new power control strategy during Soft Handover in WCDMA systems. According to the link qualities of the down link channels involved in Soft Handover, the transmit powers of the base stations in the active set are dynamically allocated. This new optimized power control scheme reduces the additional interference caused by the multiple site transmission during Soft Handover. Compared with the unbalanced and balanced power control scheme adopted by 3GPP, the proposed scheme shows better performance. It increases the downlink capacity and makes the whole system more robust to the fluctuating attenuation of the radio environment.
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Optimum size of Soft Handover zone in power-controlled UMTS downlink systems
Electronics Letters, 2002Co-Authors: Y. Chen, L. CuthbertAbstract:Soft Handover has two opposing effects on UMTS downlink systems, and there is a trade-off between them. The optimum size of the Soft Handover zone, is analysed in a power-controlled UMTS downlink system. The sensitivity of this optimum size to different system parameters, such as downlink orthogonal factor, path loss exponent, shadowing fading variable, is also analysed.
J. Larrey - One of the best experts on this subject based on the ideXlab platform.
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VTC Fall (2) - Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
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PIMRC - Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Capacity in downlink WCDMA hexagonal and sectorized scenarios using Soft Handover techniques with SIR-based power control and SSDT
2004 IEEE 15th International Symposium on Personal Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004Co-Authors: J. Larrey, J. Reig, N. CardonaAbstract:In this paper, downlink performance of WCDMA hexagonal and sectorized systems during Soft Handover mode is analyzed. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The capacity and resources allocated (number of codes required) using site selection diversity transmission power control (SSDT) is compared to usual Soft Handover techniques.
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Power allocation strategies in downlink WCDMA systems using Soft Handover and SSDT power control techniques
IEEE 60th Vehicular Technology Conference 2004. VTC2004-Fall. 2004, 2004Co-Authors: J. Reig, J. Larrey, N. CardonaAbstract:In this paper, site selection diversity transmission power control (SSDT) is compared to usual Soft Handover (SHO) techniques in downlink WCDMA hexagonal and sectorized systems. Signal to interference ratio (SIR) power control techniques are modeled and used in the simulations. The study is focused on finding the optimum Soft Handover margin in terms of maximum system capacity under E/sub b//N/sub 0/ quality requirements. The comparison is addressed throughout the capacity and required resources (number of codes) obtained from the simulations, by assuming two different power allocation strategies.
