| Author | Khan, Zuhaib Ashfaq |
| Call Number | AIT Diss no.TC-14-02 |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Telecommunications, School of Engineering and Technology
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| Publisher | Asian Institute of Technology |
| Abstract | This dissertation discusses femto-cell scenario that has been deployed as a part of Long Term Evolution (LTE) for indoor coverage extension. In order to maintain reliable service of macro-cells, it is important to mitigate destructive femto-femto (co-channel) and femto-macro (adjacent or cross channel) cell interferences respectively. The thesis report presents the performance evaluation of the novel schemes considering SISO and MIMO cases respectively in order to mitigate the interference issues in femto-macro cell scenarios. Novel cooperative, distributive, femto cooperative (Fe-COPE) and femto adjacent (Fe-ADJ) transceiver design is proposed for multiple femto-macro cell systems with the mitigation of co-channel and cross-channel interferences in various fading channel environments respectively. The significant advantage of the proposed scheme is the exploitation of the user as a relay network with feedback cancellation to acquire diversity gain from the interferer user of the femto COPE system. Fe-ADJ scheme for the cross-channel interference approach works with the coordination of femto and macro base stations by using wired back-haul whereas, another protocol (Fe-COPE) for mitigating the co-channel interference issue needs no feedback information or backhaul connection. A MIMO based novel interference mitigation scheme is discussed by exploiting Alamouti coding gain to mitigate interference issues in femto cells while enjoying the enormous diversity gain in heterogeneous networks. The performance is analyzed over independent and identical (i.i.d.) Rayleigh, Rician-K, and Nakagami-m fading channel environments. The closed form expressions for the moment generating function (M.G.F.) of the received signal-to-noise-ratio (SNR) are derived in order to evaluate the average symbol error rate (SER) analysis and bit error rate (BER) expressions are computed under M-QAM modulation scheme. Simulation results demonstrate considerable improvement in the curves of BER as a function of SNR. Monte-Carlo simulations are conduced to verify the correctness of the analytical expressions that are derived for the different proposed schemes.
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| Year | 2014 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Rajatheva, R.M.A.P; |
| Examination Committee(s) | Teerapat Sa-nguankotchakorn ;Dailey, Matthew N. ; |
| Scholarship Donor(s) | Higher Education Commission (HEC), Pakistan-AIT Fellowship; |