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Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks

Eltayeb, Mohammed

Abstract Details

2014, Doctor of Philosophy, University of Akron, Electrical Engineering.
In multiuser networks, the base stations (BSs) rely on the channel state information (CSI) of the users to perform user scheduling and downlink transmissions. While the downlink channels can be easily estimated at all user terminals via a single broadcast, several key challenges are faced during uplink (feedback) transmissions. Firstly, the amount of air-time consumed during feedback transmission grows linearly with the number of users. This domination of the network resources by feedback traffic leads to increased scheduling delay and outdated CSI at the BS. Secondly , the fed back CSI is generally corrupted by the fading and noisy feedback channel. This could lead to transmission outages if the network scheduler bases its scheduling decisions on inaccurate CSI. These challenges make CSI acquisition arduous, if not impossible, in practice. In this research, we develop efficient scheduling algorithms that account for the feedback channel impairments of multiuser wireless networks. The proposed algorithms encompass both single and dual-hop wireless networks, and; permit the BS to obtain CSI with acceptable recovery guarantees under substantially reduced feedback overhead. More specifically, we consider feedback reduction for i) multiuser networks with single antenna base stations, ii) multiuser user networks with multi-antenna base stations, and iii) cooperative multiuser networks. Analytical and simulations results show that the proposed algorithms, together with the proposed feedback noise mitigation techniques, drastically reduce the feedback overhead, and achieve a rate close to that obtained by scheduling algorithms that require noiseless dedicated feedback from all users.
Hamid Bahrami, Dr. (Advisor)
Tareq Al-Naffouri , Dr. (Advisor)
Malik Elbuluk, Dr. (Committee Member)
Nghi Tran, Dr. (Committee Member)
Ali Hajjafar, Dr. (Committee Member)
Lan Zhang, Dr. (Committee Member)
167 p.

Recommended Citations

Citations

  • Eltayeb, M. (2014). Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1414874159

    APA Style (7th edition)

  • Eltayeb, Mohammed. Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks . 2014. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1414874159.

    MLA Style (8th edition)

  • Eltayeb, Mohammed. "Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks ." Doctoral dissertation, University of Akron, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1414874159

    Chicago Manual of Style (17th edition)