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 10 of 10 for “"blind channel estimation"”.
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Blind Channel Estimation and Multiuser Detection for Multi-Rate CDMA Communications
… wireless links. Currently, the study on channel estimation and multiuser detection for multi-rate DS/CDMA, which makes full use of the nature of multi-rate signals, is still at its early stage. The thesis deals with the application of subspace-based techniques to blind channel estimation …
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On the performance and capacity of space-time block coded multicarrier CDMA communication systems
… synchronization is studied. A subspace-based blind joint timing and frequency synchronization algorithm is proposed. After all the mobile users have adjusted and achieved synchronous transmission, the semi-blind channel estimation and linear multiuser detection are performed to recover the …
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A novel OFDM Blind Equalizer: Analysis and Implementation
… is implemented at the receiver to estimate the channel impulse response. This estimate can be fed back to the transmitter via a feedback channel, which can in turn help generate a sub-optimal transmission solution for the current situation. In this thesis, a link adaptation method is proposed …
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Blind multidimensional matched filtering for wireless channelswith multiple antennas
… the most crippling handicaps of implementing a blind channel estimation scheme in a wireless receiver. The state-of-the-art blind channel estimation methods either need matrix decomposition methods, which are implementation inefficient and expensive, or higher order cumulant functions of the …
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Channel Estimation in TDD and FDD-Based Massive MIMO Systems
… to this thesis. In the first part, we study the channel estimation problem in frequency-selective multi-user (MU) multi-cell massive multiple-input multiple-output (MIMO) systems, where, a time-domain semi-blind channel estimation technique is proposed. Compared to frequency-domain, the …
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Analysis of Jamming-Vulnerabilities of Modern Multi-carrier Communication Systems
… OFDMA and SC-FDMA using Pilot Symbol Assisted Channel Estimation (PSACE) techniques in Rayleigh slow-fading channel that takes into account channel estimation error as well as pilot-jamming effect. From there we advanced to propose more novel attacks on the Cyclic Prefix (CP) of SC-FDMA. The …
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Adaptive interference suppression algorithms for DS-UWB systems
… scheme. Secondly, a novel linear reduced-rank blind adaptive receiver based on JIO and the constrained constant modulus (CCM) design criterion is proposed that offers higher spectrum efficiency. Adaptive implementations for the blind JIO receiver are developed by using the normalized stochastic …
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Blind Identification of MIMO Systems: Signal Modulation and Channel Estimation
… well as how the received signals are affected (channel) by these impediments in order to appropriately mitigate them. This dissertation addresses the blind (unaided) identification of the signal modulations and the channel in a Multiple Input Multiple Output (MIMO) system. The method presented …
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Novel Estimation and Detection Techniques for 5G Networks
The thesis presents several detection and estimation techniques that can be incorporated into the fifth-generation (5G) networks. First, the thesis presents a novel system for orthogonal frequency division multiplexing (OFDM) to estimate the channel blindly. The system is based on modulating …
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Blind Acquisition of Short Burst with Per-Survivor Processing (PSP)
… the use of Maximum Likelihood Sequence Estimation (MLSE) in the presence of unknown channel parameters. MLSE is a fundamental problem that is closely related to many modern research areas like Space-Time Coding, Overloaded Array Processing and Multi-User Detection. Per-Survivor …