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.
Results
Showing 1 to 20 of 63 for “"Interference Mitigation"”.
-
Interference mitigation in colocated wireless systems
… base station transmitters; resulting in major interference issues. The thesis identifies two major mechanism of interference for the colocated victim receiver. First, the strong jamming signals mix within the victim receiver front-end to produce intermodulation products that may fall on its …
-
Adaptive Interference Mitigation in GPS Receivers
… vulnerable to intentional and unintentional interference. GNSS signals have spectral power densities far below ambient thermal noise. Consequently, GNSS receivers must meet high standards of reliability and integrity to be used within a broad spectrum of applications. GNSS receivers must …
-
Interference Mitigation by Reconfigurable Adaptive Antenna Array
… with the metric of maximum output signal to interference plus noise ratio (SINR). We propose a new parameter, called Spatial Correlation Coefficient (SCC) to characterize the spatial separation between the target and interferences in terms of array configuration. We then extend this parameter …
-
Learning-Based Interference Mitigation for Wireless Networks
… network research has been spent on reducing the interference among the communication nodes, the problem remains open. In this dissertation, we propose a learning-based approach to alleviate wireless interference. The principle of the learning-based approach is based on the observation that …
-
Relays for Interference Mitigation in Wireless Networks
… the presence of relays in a way that mitigates interference between the network nodes. Optimal spatial locations and transmission schemes which enhance this gain are identified.
-
Inter-carrier interference mitigation for underwater acoustic communications
… potential to introduce significant inter-carrier interference (ICI). This thesis explores a number of means for mitigating ICI in such communication systems. One method that is explored is directly adapted linear turbo ICI cancellation. This scheme uses linear filters in an iterative structure to …
-
Interference Mitigation for Cellular Networks: Fundamental Limits and Applications
Interference is a key limiting factor in modern communication systems. In a wireless cellular network, the performance of cell-edge users is severely limited by the intercell interference. This thesis studies the use of interference-channel and relay-channel techniques to mitigate intercell …
-
Spectral Cohabitation and Interference Mitigation via Physical Radar Emissions
… frequency spectrum bands, without causing mutual interference, or move to other bands of the spectrum, the latter being the more undesirable choice. Two methods of spectral cohabitation are proposed and presented in this work, each taking advantage of recent developments in random frequency …
-
Inter-cell interference mitigation in LTE-advanced heterogeneous mobile networks
… the system capacity and to provide lower interference by reducing the distance between the transmitter and the receiver. However, inter-cell interference is a major technical challenge in heterogeneous networks, which mainly affects system performance and may cause a significant …
-
Integrated Tunable LC Higher-Order Microwave Filters for Interference Mitigation
Modern and future communication and radar systems require highly reconfigurable RF front-ends to realize the vision of Software-Defined Radio (SDR), where a single digitally-enabled radio is able to cover multiple bands and multiple operating standards. However, in the increasingly hostile RF …
-
Effective Scheduling Algorithms for Cross-Interference Mitigation in Heterogeneous Wireless Networks
… is powerless when dealing with Cross-Technology Interference (CTI) between Wi-Fi and Low-Rate Wireless Personal Area Network (LR-WPAN), because of asymmetric transmission power, incompatible Clear Channel Assessment (CCA) and different timing parameters. Plenty of studies have shown that WiFi …
-
Discrete Wavelet Methods for Interference Mitigation: An Application To Radio Astronomy
… project makes use of wavelets to mitigate interference, and documents how wavelets are effective in the suppression of Radio Frequency Interference (RFI) in the context of radio astronomy. This study begins with the design of a library of smooth orthogonal wavelets well suited to …
-
Non-Wiener Effects in Narrowband Interference Mitigation Using Adaptive Transversal Equalizers
… equalizer in the presence of additive narrowband interference. The steady-state LMS equalizer behavior does not correspond to that of the fixed Wiener equalizer: the mean of its weights is different from the Wiener weights, and its mean squared error (MSE) performance may be significantly better …
-
Free-space optical networks : fade and interference mitigation and network congestion control
… of the received signal, but there may also be interference that scatters into the receiver and deteriorates performance. In this thesis, we consider mitigating the fading and interference with diversity coherent and diversity incoherent detection. We derive the performance of diversity coherent …
-
Reduced Rank Adaptive Filtering Applied to Interference Mitigation in Wideband CDMA Systems
… system to perform multiuser detection (MUD) or interference suppression (IS) with no loss in performance and significant signal subspace compression better than any previous reduced rank techniques have shown. This is important for optimizing performance because it implies a reduction in the …
-
Beamforming Techniques and Interference Mitigation Using a Multiple Feed Array for Radio Astronomy
<p>Radio frequency interference has become a large problem to radio astronomers. This thesis proposes the idea that radio frequency interference can be mitigated using a phased array feed in conjunction with a large reflector. A phased array feed would allow radio astronomers to observe fainter …
-
Improving fractional frequency reuse (FFR) for interference mitigation in Multi-tier 4G wireless networks
… is the possibility of erratic but significant interference to both the Femto-cell and the Macro-cell tiers owing to their Ad-hoc mode of deployment. The Fractional Frequency Reuse (FFR) is an interference mitigation scheme, due to its effectiveness and low complexity; it has been proposed to be …
-
Machine Learning for Data-Driven Signal Separation and Interference Mitigation in Radio-Frequency Communication Systems
Single-channel source separation for radio-frequency (RF) systems is a challenging problem relevant to key applications, including wireless communications, radar, and spectrum monitoring. This thesis addresses the challenge by focusing on data-driven approaches for source separation, leveraging …
-
High-Speed Data Acquisition and FPGA Detected Pulse Blanking System for Interference Mitigation in Radio Astronomy
… RF transmissions are called radio frequency interference (RFI). One strategy to remove RFI is to apply spatial filtering using an array antenna. This thesis documents the development of a high-speed data acquisition system used to record data from 7- and 19-element phased array feeds. The …
Page 1 of 4