Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 71 for “"SINR"”.
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Communication strategies for the MIMO interference channel
… (MIMO) interference channel by extending the Max SINR algorithm. The Max SINR algorithm starts with arbitrary beamformers and then designs optimal receivers to maximize the SINR at each receiver. The Max SINR algorithm then alternates the direction of communication and repeats this process. This …
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Adaptive iterative multiuser detection for wireless communication systems
… in a low signal to interference noise ratio (SINR) region are studied in this thesis. This thesis examines a class of wireless communication systems that employs an adaptive receiver for multi-user symbol detection that operates in a low SINR (< 5 dB) region. Since the knowledge of …
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Utilizing optimal nulling to increase the number of supported wireless users over conventional beamforming
… acceptable signal-to-interference-and-noise (SINR) threshold and additional power margin. Variations of the antenna radius, number of antenna elements, and low- and high-SINR threshold are considered. We have shown a significant gain associated with the use of optimal beamformers instead of …
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Coordinated Beamforming for Millimeter-wave Terrestrial Peer-to-Peer Communication Networks
… the signal-to-interference-plus-noise ratio (SINR) of all links operating in a network. In this work, we explore coordinated beamforming in peer-to-peer networks and demonstrate its efficacy. Networks with varying numbers of links are simulated in scenarios with and without obstructions. The …
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Channel parameter tuning in a hybrid Wi-Fi-Dynamic Spectrum Access Wireless Mesh Network
… We use signal-to-interference-plus-noise ratio (SINR) as the optimisation objective. This incorporates any possible source or type of interference and makes our method agnostic to the protocol or technology of the interfering devices while ensuring that the received signal level is high enough …
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Modeling of gene regulatory networks controlling cell-fate decisions in Bacillus subtilis
… in a subpopulation of cells via a SinI-SinR-SlrR regulatory network. When the nutrient is further depleted, Spo0A~P activates sporulation by directly and indirectly regulating sporulation gene expression. In this work, using mathematical modeling, we provide system-level understandings …
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Performance Analysis and Learning Algorithms in Advanced Wireless Networks
… as the signal-to-interference-plus-noise ratio (SINR) coverage, energy coverage, and area spectral efficiency are analyzed. In addition, UAV path planning in cellular networks are investigated, and deep reinforcement learning (DRL) based algorithms are proposed to find collision-free UAV …
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Cooperative relay beamforming design for multi-cluster relay interference networks
… minimum signal-to-interference-and-noise ratio (SINR) at destinations subject to the relay power budget within each cluster. Both single and multiple source-destination (S-D) pair scenarios are considered. We propose a beam matrix structured as a weighted sum of two types of beam matrices: zero …
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Capacity Characterization of Multi-Hop Wireless Networks- A Cross Layer Approach
… as the Signal to Interference Plus Noise Ratio (SINR) model. This model is more realistic than disk-graph models as it captures the effects of signal fading and ambient noise. This work considers both disk-graph and SINR interference models. In addition to radio interference, the throughput …
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High Resolution Continuous Active Sonar
… a high signal-to-interference plus noise ratio (SINR).</p><p>CAS systems transmit at or near 100\% duty cycle for improved update rates compared to pulsed systems. For this reason, CAS is particularly attractive for use in shallow, reverberation-limited environments to provide more ``hits'' to …
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Low complexity multicast beamforming in massive MIMO multi-cell networks
… the minimum signal-to-interference-plus-noise (SINR) among users, we propose two multicast beamforming structures: weighted maximum ratio transmission (MRT) and weighted zero-forcing (ZF). Based on the weighted MRT beamforming structure, we propose a multicast beamforming design that transforms …
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Joint relay beamforming and transceiver processing in multiuser relay network
… individual relay power subject to pre-defined SINR requirements. The resulting non-convex optimization problem is solved by ordinary semi-definite relaxation (SDR) and separable SDR approaches. Compared to conventional rank-one scheme, proposed rank-two methods provide one more degree of …
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Post-translational control of <em>Bacillus subtilis</em> biofilm formation
… transcription factors including the repressor SinR and activator DegU. I initially identified that these transcriptional regulators control biofilm formation via parallel pathways. Through investigating the regulation of biofilm formation by SinR and DegU, I discovered that biofilm formation is …
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Improving fractional frequency reuse (FFR) for interference mitigation in Multi-tier 4G wireless networks
… signal-to-interference-plus-noise ratio (SINR) and its daughter metrics such as channel capacity and throughput) was estimated. In terms of the SINR, the performance improvement recorded for Femto-cell users at the border region after the implementation of the buffer zone was more than …
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The Immune Inhibitor A1 Protease of <em>Bacillus Anthracis</em>
… are controlled by the regulatory protein SinR, which inhibits <em>inhA1</em> expression. Second, InhA1 abundance is inversely proportional to the SinR-regulated protease camelysin, indicating the post-transcriptional regulation of InhA1 by camelysin. Third, InhA1 activity is dependent on a …
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Performance evaluation for communication systems with receive diversity and interference
… output signal to interference plus noise ratio (SINR) and results in expressions for symbol and bit error probability for multiple phaseshift keying modulation. The third method uses the probability density function of the output SINR and arrives at expressions of symbol error probability for …
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A Study of Interference Suppression Using Deep Learning Methods
… for different SNR values along with the SINR values to observe the effectiveness of the approach at different levels. The results of our approach are quantified using popular metrics such as bit error rate (BER), error vector magnitude (EVM), and Signal to Noise-Interference Ratio (SINR). …
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Transmitter Authentication in Dynamic Spectrum Sharing
… signal's signal to interference and noise ratio (SINR) and the authentication signal's SINR. In this dissertation, the novel approaches which are not constrained by the aforementioned tradeoff between message and authentication signals, are proposed.
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Improving Implantable Medical Device Security Through Cooperative Jamming
… share the underlying principles of minimizing SINR at potential eavesdroppers while maximizing the SINR at the intended receiver. Researchers exploring cooperative jamming have largely used models to estimate its impact on channel secrecy. While RF propagation and communication system modeling …
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Robust multi-group multicast beamforming design and antenna selection for massive MIMO systems
… transmit power limit, and the minimum worst case SINR requirements while limited number of antennas can be exploited for beamforming. To overcome the acquired mixed-Boolean problem, we replace the binary constraints with a continuous equivalent form. We use exact penalty function to transfer the …
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