- 111 views
- 118 downloads
Performance Analysis of Network-Coded Cooperation Systems
- Author / Creator
- Heidarpour, Ali Reza
Today’s wireless networks face scarcity and expense of the radio spectrum, unprecedented increase in data traffic, and excessive energy consumption. The vision of the next generation of wireless networks is to overcome these challenges and provide seamless and ubiquitous wireless connectivity.
Cooperative communication (CC) and network coding (NC), referred to as network-coded cooperation (NCC), appears to be the ideal architecture for future wireless networks. The main focus of this thesis is to propose and analyze new NCC transmission strategies and study their performance under practical implementation issues.
The first part of this thesis focuses on design and analysis of new transmission strategies in single-antenna NCC systems. Firstly, we propose a two-step user-relay selection in multiuser multirelay NCC systems to exploit both multiuser diversity (MUD) and cooperative diversity (CD). Taking into account practical constraints, we suggest the most generalized user-relay selection (GURS) scheme. It selects any arbitrary subsets of users and any arbitrary subsets of relays. Our analytical results and design guidelines generalize and subsume all existing results as special cases. Secondly, we investigate the performance of a NCC system in an underlay cognitive radio network (CRN). Compared to the existing literature, the proposed CRN NCC has four main distinguishable features: i) it is applicable to general CRN NCC network settings with arbitrary number of sources and relays; ii) it considers general relay selection (RS) and independent and non-identically distributed (i.n.i.d.) Nakagami-m fading channels; iii) it accounts for maximum transmit power at the secondary network (SN) and assumes secondary-to-primary (S2P) and primary-to-secondary (P2S) interference links; and iv) it provides a generalized version of previous works and includes existing results in the literature as special cases.
Despite the rich literature on NCC, all existing works have predominantly been focused on relay networks with single-antenna terminals. The applications of multiple-input multiple-output (MIMO) techniques on NCC networks are also interesting, which have been lacking in the literature. Furthermore, not only MIMO NCC is not studied in the literature, but also the existing NCC RS strategies rely on the “max-min” end-to-end (E2E) criterion. This RS strategy will be too complicated even for a network with single-antenna terminals as it requires global channel state information (CSI). Such high signaling overhead leads to difficult implementation of NCC system with RS, especially for a network with a large number of branches. Attracted by the benefits of multi antenna techniques in enhancing NCC system performance, in the second part of the thesis, we firstly extend single-antenna NCC to a multi-antenna scenario. A new RS strategy for NCC systems is also proposed and analyzed. It can substantially reduce the required signaling overhead for RS-based NCC, without sacrificing the performance. Secondly, we investigate the performance of RS MIMO NCC systems under practical implementation issues such as co-channel interference (CCI) and outdated CSI.
- Graduation date
- Fall 2021
- Type of Item
- Doctor of Philosophy
- This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.