Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"reverse link"”.
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Data Chunking in Quasi-synchronous DS-CDMA
… difficult to perfectly synchronize users in the reverse link due to the geographic diversity of mobile users in the cell. As a result, most commercial DS-CDMA networks utilize an asynchronous reverse link resulting in a reduced user capacity. A possible compromise to increase the user capacity in …
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SCHEDULING IN PACKET SWITCHED CELLULAR WIRELESS SYSTEMS
… has been greatly increased on the downlink by using opportunistic schedulers at the base station. These schedulers exploit the multiuser diversity inherent in cellular systems. An interesting question is how opportunistic schedulers will provide Quality of Service(QoS) guarantees for a …
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Smart Base Station Antenna Performance for Several Scenarios - an Experimental and Modeling Investigation
… developed to investigate performances of three reverse link diversity methods. The experiment campaign resulted in 245 sets of collected data over 83 measurement sites, which were used to compare the performance of space, polarization, and angle diversity under identical conditions. Measured …
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A multistage RAKE receiver for CDMA systems
… control and multiple access interference for the reverse link CDMA channel. Under a wide range of conditions, the multistage RAKE receiver is able to support two to three times as many users as a conventional single stage RAKE receiver. The receiver is also shown to be robust to the near-far …
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Space-time Processsing for the Wideband-CDMA System
… as two-dimensional (2-D) RAKE receiver, for the reverse link of the W-CDMA system. We consider three different Pilot Symbol Assisted (PSA) beamforming techniques, Direct Matrix Inversion (DMI), Least-Mean Square (LMS) and Recursive Least Square (RLS) adaptive algorithms. Two different …
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Antenna Array Systems: Propagation and Performance
… to separate the signals of two users on the reverse link is studied using simulation. Finally, forward link beamforming techniques are reviewed.
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VT-STAR design and implementation of a test bed for differential space-time block coding and MIMO channel measurements
… multiple-output (SIMO) channel in the reverse link, meaning one transmit antenna at the user terminal and multiple receive antennas at the base station. Recently, information theoretic research has shown an enormous potential growth in the capacity of wireless systems by using multiple …
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Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks
… of the inter-cell interference and the reverse-link capacity of the network. An analytical model for optimizing capacity in multi-cell WCDMA networks is presented. Capacity is optimized for different spreading factors and for perfect and imperfect power control. Numerical results show …
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A hybrid frequency modulated CDMA communication system
… and the system robustness, compare the forward link and the reverse link system performance and investigate the effect of power control schemes.
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Selective cancellation of interference for CDMA
… improving the performance and capacity of the reverse link in a Code Division Multiple Access (CDMA) cellular system. However, it has beep observed that indiscriminate cancellation of all received signals can degrade performance. This thesis explores the use of selective cancellation to improve …
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On the Impact of MIMO Implementations on Cellular Networks: An Analytical Approach from a Systems Perspective
… research, system capacity and coverage of the uplink (or reverse link) are investigated when antenna arrays are implemented at both the BS and the MS. In addition, the system capacity and soft handoff capability of the downlink (or forward link) are examined taking into account MIMO. Furthermore, …
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Analytical Framework for the Performance Analysis of Multiple Antenna Systems
… impact of transmit diversity at handsets on the reverse link DS/CDMA systems in terms of capacity and coverage over generalized fading channels through analytical approaches. Then, we validate the analytical results with simulation results and investigate practical issues which are hard to …