The Experts below are selected from a list of 16908 Experts worldwide ranked by ideXlab platform
Di Yuan - One of the best experts on this subject based on the ideXlab platform.
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enhancing hsdpa performance via automated and large scale optimization of radio base station Antenna Configuration
Vehicular Technology Conference, 2008Co-Authors: Iana Siomina, Di YuanAbstract:The rapid deployment of High Speed Downlink Packet Access (HSDPA) calls for automated optimization in network planning. In this paper, we study HSDPA performance improvement by means of optimizing base station Antenna Configuration. We consider networks with mixed HSDPA and Release 99 (R99) services that share the power resource of the cells. We present an optimization framework to capture the relationship between Antenna Configuration, service coverage, power sharing between R99 and HSDPA, and HSDPA performance, taking into account the influence of cell size and user distribution on HSDPA user throughput. The cost function is targeted at improving the average HSDPA user throughput. The engine of our computational machinery is a simulated annealing algorithm that is able to search and improve Antenna Configurations effectively and time-efficiently. We report the benefit of our approach for a realistic planning scenario for the city of Lisbon. The experiment demonstrates that automated optimization leads to significantly better HSDPA throughput.
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automated optimization of service coverage and base station Antenna Configuration in umts networks
IEEE Wireless Communications, 2006Co-Authors: Iana Siomina, Peter Värbrand, Di YuanAbstract:Deployment and maintenance of UMTS networks involve optimizing a number of network Configuration parameters in order to meet various service and performance requirements. In this article we address automated optimization of service coverage and radio base station Antenna Configuration. We consider three key Configuration parameters: transmit power of the common pilot channel (CPICH), Antenna tilt, and Antenna azimuth. CPICH power greatly influences coverage. From a resource management point of view, satisfying the coverage requirement using minimum CPICH power offers several performance advantages. In particular, less CPICH power leads to less interference and higher system capacity. Optimal CPICH power, in its turn, is highly dependent on how the other two parameters, tilt and azimuth, are configured at radio base station Antennas. Optimizing Antenna tilt and azimuth network-wise, with the objective of minimizing the CPICH power consumption, is a challenging task. The solution approach in this article adopts automated optimization. Our optimization engine is a simulated annealing algorithm. Staring from an initial Configuration, the algorithm searches effectively in the solution space of possible Configurations in order to find improvements. The algorithm is computationally efficient; thus, we can optimize large networks without using excessive computing resources. We present a case study for a UMTS planning scenario in Lisbon. For this network, automated optimization saves up to 70 percent of the CPICH power used in the reference network Configuration. In addition, the optimized network Configuration offers significant performance improvement in terms of fewer overloaded cells and lower downlink load factor
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VTC Fall - An Effective Optimization Algorithm for Configuring Radio Base Station Antennas in UMTS Networks
IEEE Vehicular Technology Conference, 2006Co-Authors: Iana Siomina, Peter Värbrand, Di YuanAbstract:In this paper we propose an effective algorithm for configuring radio base station Antennas in UMTS networks and optimizing the primary common pilot channel (CPICH) transmit power. The algorithm is based on tabu search and utilizes the advantage of a problem size reduction technique which allows us to detect the most critical parts of the service area where the coverage loss probability is very sensitive to the choice of Antenna Configuration in neighboring cells. We report numerical results for a test network originating from a realistic planning scenario for the city of Lisbon.
Iana Siomina - One of the best experts on this subject based on the ideXlab platform.
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enhancing hsdpa performance via automated and large scale optimization of radio base station Antenna Configuration
Vehicular Technology Conference, 2008Co-Authors: Iana Siomina, Di YuanAbstract:The rapid deployment of High Speed Downlink Packet Access (HSDPA) calls for automated optimization in network planning. In this paper, we study HSDPA performance improvement by means of optimizing base station Antenna Configuration. We consider networks with mixed HSDPA and Release 99 (R99) services that share the power resource of the cells. We present an optimization framework to capture the relationship between Antenna Configuration, service coverage, power sharing between R99 and HSDPA, and HSDPA performance, taking into account the influence of cell size and user distribution on HSDPA user throughput. The cost function is targeted at improving the average HSDPA user throughput. The engine of our computational machinery is a simulated annealing algorithm that is able to search and improve Antenna Configurations effectively and time-efficiently. We report the benefit of our approach for a realistic planning scenario for the city of Lisbon. The experiment demonstrates that automated optimization leads to significantly better HSDPA throughput.
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automated optimization of service coverage and base station Antenna Configuration in umts networks
IEEE Wireless Communications, 2006Co-Authors: Iana Siomina, Peter Värbrand, Di YuanAbstract:Deployment and maintenance of UMTS networks involve optimizing a number of network Configuration parameters in order to meet various service and performance requirements. In this article we address automated optimization of service coverage and radio base station Antenna Configuration. We consider three key Configuration parameters: transmit power of the common pilot channel (CPICH), Antenna tilt, and Antenna azimuth. CPICH power greatly influences coverage. From a resource management point of view, satisfying the coverage requirement using minimum CPICH power offers several performance advantages. In particular, less CPICH power leads to less interference and higher system capacity. Optimal CPICH power, in its turn, is highly dependent on how the other two parameters, tilt and azimuth, are configured at radio base station Antennas. Optimizing Antenna tilt and azimuth network-wise, with the objective of minimizing the CPICH power consumption, is a challenging task. The solution approach in this article adopts automated optimization. Our optimization engine is a simulated annealing algorithm. Staring from an initial Configuration, the algorithm searches effectively in the solution space of possible Configurations in order to find improvements. The algorithm is computationally efficient; thus, we can optimize large networks without using excessive computing resources. We present a case study for a UMTS planning scenario in Lisbon. For this network, automated optimization saves up to 70 percent of the CPICH power used in the reference network Configuration. In addition, the optimized network Configuration offers significant performance improvement in terms of fewer overloaded cells and lower downlink load factor
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VTC Fall - An Effective Optimization Algorithm for Configuring Radio Base Station Antennas in UMTS Networks
IEEE Vehicular Technology Conference, 2006Co-Authors: Iana Siomina, Peter Värbrand, Di YuanAbstract:In this paper we propose an effective algorithm for configuring radio base station Antennas in UMTS networks and optimizing the primary common pilot channel (CPICH) transmit power. The algorithm is based on tabu search and utilizes the advantage of a problem size reduction technique which allows us to detect the most critical parts of the service area where the coverage loss probability is very sensitive to the choice of Antenna Configuration in neighboring cells. We report numerical results for a test network originating from a realistic planning scenario for the city of Lisbon.
Magdalena Bielinski - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - mm Wave UE Antenna Configuration Study
2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015Co-Authors: Steven Ferrante, Philip J. Pietraski, Tao Deng, Magdalena BielinskiAbstract:Abstract- Millimeter wave (mm wave) communication has emerged as a promising component of 5G cellular systems. The large losses in the Friis equation (due to the implied small apertures of mm wave Antennas) suggest that high gain Antennas are required. The high gain also implies steerability is required. Arrays of patch Antennas are one possible low cost solution, but each array has a limited angular field of view. Multiple arrays per node can be used to improve the field of view. Choosing the correct Antenna Configuration requires a complex cost-benefit analysis and performance-complexity tradeoff. In this paper, we investigate these tradeoffs through system simulations. Our study uses ray tracing in 3D deployment scenarios and realistic patch Antenna array models. MATLAB-based system simulation results are provided, and conclusions are drawn to provide insight into the performance vs. Antenna complexity of a mm wave based system. Some of the key conclusions are: diminishing returns on performance as the number of arrays are increased, and the fact that a smaller number of larger arrays can outperform a larger number of smaller arrays. Iso-element curves are also presented as another way to perform a cost-benefit analysis.
Jukka Lempiainen - One of the best experts on this subject based on the ideXlab platform.
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Strategic Innovations and Interdisciplinary Perspectives in Telecommunications and Networking - Multidimensional Analysis of LTE Network Rollout With Typical and Non-Typical Antenna Configurations
Strategic Innovations and Interdisciplinary Perspectives in Telecommunications and Networking, 2019Co-Authors: Muhammad Usman Sheikh, Jukka Lempiainen, Riku JanttiAbstract:Higher order sectorization and the site densification are the two renowned solutions for the cellular system capacity crunch. However, in order to take adequate benefits of these techniques they should be implemented with optimal Antenna Configuration. This chapter highlights the gain of using an optimized Antenna Configuration for three- and six-sector sites in achieving a better network coverage and network quality (i.e., capacity). Unlike traditional wide 65° HPBW Antenna, this chapter also focuses on the use of other narrow HPBW Antennas for three- and six-sector sites. This chapter provides detailed analysis of network performance from coverage, capacity, spectral-efficiency, power-efficiency, and cost-efficiency point of view. It also provides a fair comparison between the network rollout with traditional three-sector sites and higher order six-sector sites. Similarly, the impact of site densification along with sector densification is also studied in this chapter.
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Impact of Non-Typical Antenna Configurations on Higher Order Sectored Sites in Ultra Dense Networks
International Journal of Interdisciplinary Telecommunications and Networking, 2017Co-Authors: Muhammad Usman Sheikh, Jukka LempiainenAbstract:The site densification and higher order sectorization are the two well-known possible ways of increasing the system capacity. However, to take the full advantage of these techniques they should be implemented with optimum Antenna Configuration. The target of this paper is to highlight the gain of using an optimized Antenna Configuration for 3-, and 6-sector sites in achieving a better quality (SINR) and capacity. Generally, a 3-sector site is deployed with 65° HPBW Antenna; however, it was observed that for ultra-dense networks i.e. 100 m to 250 m ISD distance 3-sector site gives better result with 32° HPBW Antenna. Similarly, performance of 6-sector site was found better with 16° HPBW Antenna at small ISDs, whereas at large intersite distances the 32° HPBW Antenna was found to be a preferred choice. It was observed that spectral efficiency of the cell degrades with site densification and higher order sectorization, but the overall capacity of a system improves due to more number of sectors and cells.
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VTC Spring - HSDPA Measurements for Indoor DAS
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007Co-Authors: Tero Isotalo, Jukka LempiainenAbstract:The target of the paper is to study performance of HSDPA in indoor environment, and to provide guidelines for HSDPA coverage and capacity planning and Antenna Configurations selection. Field measurements with a HSDPA data card, field measurement software, and a fully functional HSDPA enabled UMTS network were performed. Indoor corridor environment was used to study the impact of different distributed Antenna Configurations on a HSDPA performance. In addition, pico cell Configuration is compared to corresponding distributed Antenna Configuration, and the effect of coverage limitations on HSDPA capacity is studied. The results show, that ensuring sufficient coverage is the key factor in planning HSDPA indoor network. Signal quality can be enhanced by increasing the number of Antennas in DAS, which is also visible as improved capacity. Better signal level can be achieved by pico base stations, but taking benefit of added capacity is problematic. The measurement results show that distributed Antenna Configuration provides better performance compared to pico cells. As a conclusion, adequate coverage planning plays an important role in planning indoor networks for HSDPA, and some additional capacity can be gained by Antenna Configuration optimization.
Ekambir Sidhu - One of the best experts on this subject based on the ideXlab platform.
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Design and Performance Analysis of Step Graded Dielectric Profile High Gain Flexible Textile Antennas for Radiolocation Military and Aeronautical Radio Navigation Applications
Advances in Signal Processing and Intelligent Recognition Systems, 2018Co-Authors: Kirtan Kaur, Sneh Kanwar Singh Sidhu, Raveena Bhatoa, Aman Nag, Ekambir SidhuAbstract:This paper emphasizes on the analysis of stacking different dielectric materials forming step graded profile along the thickness of the substrate in the microstrip patch Antenna design. The different step graded dielectric profiles have been employed to design Antennas and the performance of proposed Antennas have been analyzed in terms of gain (dB), directivity (dBi), return loss (dB), VSWR, half power beam width (degrees), total efficiency (dB), side lobe level (dB) and impedance bandwidth (MHz). The stacking of three flexible textile materials namely fleece, felt and curtain cotton having dielectric constant of 1.04, 1.35 and 1.47, respectively have been used as substrate material to obtain six step graded dielectric profile Antenna Configurations which are P1, P2, P3, P4, P5 and P6. It has been concluded that the profile P3 having staircase dielectric profile is the best suited Antenna Configuration due to effective return loss, high gain, directivity and HPBW. The step graded dielectric profile Antenna designs have been practically fabricated employing copper material as patch, feedline and ground having conductivity of 5.96 × 107 S/m. The performance of fabricated Antennas has been analyzed practically by employing E5071C network analyzer and anechoic chamber. It has been observed that practical results intently match with the simulated results of the proposed Antenna Configurations. The proposed Antenna Configurations can be suitably employed for Military Radiolocation and Aeronautical Radio navigation applications as the proposed Antenna Configuration is resonant at 16.262 GHz which matches with the corresponding resonant frequency range of 15.6–16.6 GHz.
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SIRS - Design and Performance Analysis of Step Graded Dielectric Profile High Gain Flexible Textile Antennas for Radiolocation Military and Aeronautical Radio Navigation Applications
Advances in Intelligent Systems and Computing, 2017Co-Authors: Kirtan Kaur, Sneh Kanwar Singh Sidhu, Raveena Bhatoa, Aman Nag, Ekambir SidhuAbstract:This paper emphasizes on the analysis of stacking different dielectric materials forming step graded profile along the thickness of the substrate in the microstrip patch Antenna design. The different step graded dielectric profiles have been employed to design Antennas and the performance of proposed Antennas have been analyzed in terms of gain (dB), directivity (dBi), return loss (dB), VSWR, half power beam width (degrees), total efficiency (dB), side lobe level (dB) and impedance bandwidth (MHz). The stacking of three flexible textile materials namely fleece, felt and curtain cotton having dielectric constant of 1.04, 1.35 and 1.47, respectively have been used as substrate material to obtain six step graded dielectric profile Antenna Configurations which are P1, P2, P3, P4, P5 and P6. It has been concluded that the profile P3 having staircase dielectric profile is the best suited Antenna Configuration due to effective return loss, high gain, directivity and HPBW. The step graded dielectric profile Antenna designs have been practically fabricated employing copper material as patch, feedline and ground having conductivity of 5.96 × 107 S/m. The performance of fabricated Antennas has been analyzed practically by employing E5071C network analyzer and anechoic chamber. It has been observed that practical results intently match with the simulated results of the proposed Antenna Configurations. The proposed Antenna Configurations can be suitably employed for Military Radiolocation and Aeronautical Radio navigation applications as the proposed Antenna Configuration is resonant at 16.262 GHz which matches with the corresponding resonant frequency range of 15.6–16.6 GHz.
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high gain stacked microstrip folded dipole yagi Antenna Configuration for wimax applications
International Conference on Wireless Communications and Signal Processing, 2016Co-Authors: Raveena Bhatoa, Ekambir SidhuAbstract:This paper demonstrates the design and performance analysis of the stacked microstrip folded dipole Yagi Antenna. The proposed Antenna design employs three substrates of FR4 material, each having thickness and dielectric constant of 1.62 mm and 4.4, respectively. The proposed Antenna design, consists of three substrates (named as Substrate 1, Substrate 2, Substrate 3) stacked together to form stacked microstrip folded dipole Yagi Antenna Configuration. The director elements, folded dipole feed line and reflector elements have been placed on Substrate 1, Substrate 2 and Substrate3 respectively. The proposed Antenna has been designed using CST Microwave Studio 2014. The analyzation of proposed folded dipole Yagi Antenna design has been taken place in terms of resonant frequency, return loss (S 11 ), gain (dB), directivity (dBi) and percentage bandwidth. The proposed Antenna resonates at 5.38 GHz with an impedance bandwidth of 170 MHz and an operating frequency range of 5.31 GHz – 5.48 GHz. The proposed Antenna has return loss (S 11 ) of −61dB at resonant frequency of 5.38 GHz. The Antenna has gain of 7.4 dB, directivity of 7.37 dBi and percentage bandwidth of 3.1 percent at resonant frequency of 5.38 GHz. T he proposed Antenna has been fabricated and successfully tested for return loss (S 11 ) using E5071C network analyzer and anechoic chamber. The simulation and experimental results have been examined and it has been concluded that the practical results closely match with the theoretical results. The proposed Antenna can be suitably used for WiMAX applications.