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Coordinated Multi-Points (CoMP) Transmission in Multiuser Relay Networks

Kiamari, Mehrdad | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44942 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Hossein Khalaj, Babak
  7. Abstract:
  8. Joint multi-input multi-output (MIMO) filter-and-forward relaying and post-processing at base stations (BSs) for uplink coordinated multi-point (CoMP) reception has been investigated in the case of users-to-relay and relay-to-BSs frequency-selective fading channels. Signal transmission from users to BSs is performed in two phases. In the first phase, all users transmit their data to MIMO relay at the same time slot. In order to combat the interference due to frequency-selectivity of channels, MIMO relay passes its received signals through a finite impulse response (FIR) filter. Then, in the second phase, relay transmits the processed signals to the BSs. In order to further reducemean square error (MSE), each BS applies post-processing to its received signals. We considered four optimization problems, namely minimization of sum mean square error (SMSE) subject to the transmit power constraint of relay, minimization of relay transmit power under the constraint of SMSE, minimization of the worst MSE subject to the transmit power constraint of relay, as well as minimization of relay transmit power under the constraint of individual MSEs. Iterative algorithms are proposed to jointly optimize filter matrices at relay node and post-processing matrices at coordinated BSs. Simulation results show the significant effectiveness of the proposed schemes in comparison with joint MIMO amplify-and-forward relay and post-processing BSs
  9. Keywords:
  10. Relay Network ; Multiple Input Multiple Output (MIMO)System ; Filter-and-Forward Relay Network ; Coordinated Multipoint (CoMP)Networks

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