- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Interference mitigation and alignment for interference-limited...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Interference mitigation and alignment for interference-limited communication systems Rahman, Md. Jahidur
Abstract
With limited availability of the communication spectrum and ever-increasing demands for high-data-rate services, it is natural to reuse the same time-frequency resource to the greatest degree possible. Depending on the nature of transmission and reception of the users, this leads to different instances of interference, e.g., inter-user interference in an interference network and self-interference in a Full-Duplex (FD) transmission. With a goal to mitigate such interference, in this thesis we investigate emerging interference-limited communication systems, such as FD, Device-to-Device (D2D), and Power Line Communication (PLC). To this end, we propose advanced solutions, namely self-interference mitigation and Interference Alignment (IA). With an objective to reduce the power consumption, we study transceiver design for FD multi-cell Multi-Input Multi-Output (MIMO) systems with guaranteed Quality of Service (QoS). Considering realistic self-interference models and robustness against Channel State Information (CSI) uncertainty, our numerical results reveal transmission scenarios and design parameters for which replacing half-duplex with FD systems is beneficial in terms of power minimization. If the system is not power constrained, however, a natural objective is to optimize the total throughput given a power budget. Nonetheless, throughput maximization underserves the users that experience poor channels, which leads to QoS unfairness. Therefore, we propose a fair transceiver design for FD multi-cell MIMO systems, which can be implemented in a distributed manner. We further extend our design to enforce robustness against CSI uncertainty. As a second contribution within this design theme, the concept of robust fair transceiver design is also extended for D2D communications, where unlike the self-interference in FD transmission, the users suffer from strong inter-user interference. Recognizing that simultaneous multiple connections in PLC contribute to (interuser) interference-limited communication, we introduce IA techniques for PLC networks, for which the results confirm a significant sum-rate improvement. To overcome the implementation burden of CSI availability for IA techniques, we then study Blind Interference Alignment (BIA) for PLC X-network, and show that the characteristics of the PLC channel thwart simple implementation of this technique via impedance modulation. We therefore resort to a transmission scheme with multiple receiving ports, which can achieve the maximum multiplexing gain for this network.
Item Metadata
Title |
Interference mitigation and alignment for interference-limited communication systems
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
2017
|
Description |
With limited availability of the communication spectrum and ever-increasing demands
for high-data-rate services, it is natural to reuse the same time-frequency resource
to the greatest degree possible. Depending on the nature of transmission and
reception of the users, this leads to different instances of interference, e.g., inter-user
interference in an interference network and self-interference in a Full-Duplex (FD)
transmission. With a goal to mitigate such interference, in this thesis we investigate
emerging interference-limited communication systems, such as FD, Device-to-Device
(D2D), and Power Line Communication (PLC). To this end, we propose advanced
solutions, namely self-interference mitigation and Interference Alignment (IA).
With an objective to reduce the power consumption, we study transceiver design
for FD multi-cell Multi-Input Multi-Output (MIMO) systems with guaranteed Quality
of Service (QoS). Considering realistic self-interference models and robustness
against Channel State Information (CSI) uncertainty, our numerical results reveal
transmission scenarios and design parameters for which replacing half-duplex with
FD systems is beneficial in terms of power minimization. If the system is not power constrained,
however, a natural objective is to optimize the total throughput given
a power budget. Nonetheless, throughput maximization underserves the users that
experience poor channels, which leads to QoS unfairness. Therefore, we propose a
fair transceiver design for FD multi-cell MIMO systems, which can be implemented
in a distributed manner. We further extend our design to enforce robustness against CSI uncertainty. As a second contribution within this design theme, the concept of
robust fair transceiver design is also extended for D2D communications, where unlike
the self-interference in FD transmission, the users suffer from strong inter-user
interference. Recognizing that simultaneous multiple connections in PLC contribute to (interuser)
interference-limited communication, we introduce IA techniques for PLC networks,
for which the results confirm a significant sum-rate improvement. To overcome
the implementation burden of CSI availability for IA techniques, we then study Blind
Interference Alignment (BIA) for PLC X-network, and show that the characteristics
of the PLC channel thwart simple implementation of this technique via impedance
modulation. We therefore resort to a transmission scheme with multiple receiving
ports, which can achieve the maximum multiplexing gain for this network.
|
Genre | |
Type | |
Language |
eng
|
Date Available |
2017-12-22
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
DOI |
10.14288/1.0362403
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
2018-02
|
Campus | |
Scholarly Level |
Graduate
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International