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Skip to Search Results- 1Babaee, Ramin
- 1Dehghani Rahimzadeh, Payam
- 1Farhadi, Golnaz
- 1Hosseini, Iraj
- 1Nikjah, Reza
- 1Paysarvi Hoseini, Pedram
- 2Cooperative communications
- 2Outage probability
- 1Acknowledgment signals
- 1Amplify-and-Forward
- 1Amplify-and-forward relaying
- 1Antenna correlation
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Design of Optimal Frameworks for Wideband/Multichannel Spectrum Sensing in Cognitive Radio Networks
DownloadSpring 2011
Several optimal detection frameworks for wideband/multichannel spectrum sensing in cognitive radio networks are proposed. All frameworks search for multiple secondary transmission opportunities over a number of narrowband channels, enhancing the secondary network performance while respecting the...
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Fall 2009
Multiple access interference (MAI) in time-hopping (TH) ultra-wideband (UWB) systems is known to be non-Gaussian. Several statistical models have been proposed for the MAI, and based on them various nonlinear single-user receivers have been designed. In this thesis, an accurate mathematical model...
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Fall 2012
In opportunistic relaying systems, only the relay with best channel condition among K relays is selected to take part in cooperation. This setup efficiently achieves diversity gain. However, the high switching rate of such systems may be undesirable due to practical implementation issues, for...
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Spring 2012
Future generations of wireless cellular networks will vastly benefit from the various advantages of multiple antenna techniques. It is, however, well known that signal correlation among a closely spaced set of antennas deployed on a small wireless mobile device can dramatically degrade the...
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Performance evaluation and protocol design of fixed-rate and rateless coded relaying networks
DownloadSpring 2011
The importance of cooperative relaying communication in substituting for, or complementing, multiantenna systems is described, and a brief literature review is presented. Amplify-and-forward (AF) and decode-and-forward (DF) relaying are investigated and compared for a dual-hop relay channel. The...
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Performance evaluation, optimal power allocation, and physical layer designs for wireless relaying systems
DownloadFall 2009
Cooperative communication is a promising way to improve wireless network performance by exploiting spatial diversity in fading channels in a distributed manner. Performance of various wireless cooperative configurations are investigated. Theoretical expressions for outage and error probabilities...
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Fall 2014
Soliman, Samy Soliman Shokry Botros
Wireless cooperative networks have recently attracted the attention of many researchers as well as industry because such networks promise large diversity gains and increased capacity compared to other wireless communication systems. Accurate performance analysis of wireless cooperative systems is...
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Spring 2011
Multihop routing is an effective method for establishing connectivity between the nodes of a network. End-to-end outage probability and total power consumption are applied as the optimization criteria for routing protocol design in multihop networks based on the local channel state information...
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Statistical analysis of multiuser and narrowband interference and superior system designs for impulse radio ultra-wide bandwidth wireless
DownloadFall 2011
Ultra-wide bandwidth (UWB) wireless is a fast emerging technology which exploits major advances and offers unprecedented opportunity to impact wireless communications. In UWB systems, several users should coexist viably in the same coverage area. The multiuser interference (MUI) caused by...