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Resource Allocation in mmWave Massive MIMO Transmission in the Presence of Neighboring Cells Interference

Sadeghabadi, Elahe | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50669 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Kenari, Masoumeh
  7. Abstract:
  8. In Massive multiple input multiple output (MIMO) systems, due to utilizing a large antenna array in each base station, each user’s channel is orthogonal to one another. These systems have some valuable advantages such as the reduction of energy needed for transmission and significant improvement in spectral efficiency, which makes them be suitable for the next generation of wireless communication systems. In this thesis a massive MIMO working is considered on TDD mode, for wich the channel estimation is done in the base station using the pilot sequences recieved from users. At the beginning of each coherence block, users send their pilot sequences and the rest of the times is allocated to downlink and uplink data transmissions. The coverage probability and ergodic rate of the system are analyazed using stochastic geometry tool . Then based on the results derived, optimzation problem are defined to determine two system parameters, namely the maximum number of users supported by each cell and the power control parameter in the uplink. While in most prior works, a synchronous system has been assumed, in which all users and base stations in all cells send thier pilot and data sequences at the same time, in this thises, the coverage probability and ergodic rate are obtained for both synchronous and asynchronous systems. For a synchronous case, the analytical analysis ared carried out using some reasonable approximation. Simulation results validate the applied approximations. For the examles considered, the asynchronous system performs lower than the synchronous system, in contrast to the previous report
  9. Keywords:
  10. Massive Multiple-Input Multiple-Output Systems ; Stochastic Geometry ; Synchronous System ; Asynchronous System ; Coverage Probability

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