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 26 for “"DoA Estimation"”.
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Evaluation of Joint AOA and DOA Estimation Algorithms Using the Antenna Array Systems
… as MUltiple SIgnal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques ESPRIT algorithms. Since using delay of arrival information can improve AOA estimates and classical PL algorithms do not incorporate Delay of Arrival (DOA) information, the …
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Underwater Direction-of-Arrival Finding: Maximum Likelihood Estimation and Performance Analysis
… consider the problems of direction-of-arrival: DOA) finding using acoustic sensor arrays in underwater scenarios, and develop novel signal models, maximum likelihood: ML) estimation methods, and performance analysis results. We first examine the underwater scenarios where the noise on sensor …
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Weak interference direction of arrival estimation in the GPS frequency band
… techniques to estimate the direction of arrival (DOA) of weak interferences in the GPS frequency band using antenna arrays. The main issues which affect weak GPS interference DOA estimation accuracy are the antenna array errors, interference from other GPS signals, the number of snapshots required …
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Interference Mitigation by Reconfigurable Adaptive Antenna Array
… as target detection and direction of arrival (DOA) estimation to list a few. Traditional receiver structures with a fixed array configuration are either inefficient due to array redundancies or may incur significant performance loss due to insufficient degrees of freedom (DoFs) under different …
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3D Massive MIMO and Artificial Intelligence for Next Generation Wireless Networks
… This dissertation focuses on aspects of channel estimation and precoding for 3D massive MIMO systems and application of deep reinforcement learning (DRL) for MIMO broadcast beam synthesis. To be specific, downlink (DL) precoding and power allocation strategies are identified for a …
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An electrically small multi-port loop antenna for direction of arrival estimation
Direction of arrival (DoA) estimation or direction finding (DF) requires multiple sensors to determine the direction from which an incoming signal originates. These antennas are often loops or dipoles oriented in a manner such as to obtain as much information about the incoming signal as possible. …
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Sparse spectrum fitting in array processing
… to the problem of Direction-Of-Arrival (DOA) estimation using sensor arrays. By developing the sparse representation models for the spatial covariance matrix of correlated or uncorrelated sources respectively, the DOA estimation problem is reformulated under the framework of Sparse Signal …
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Array Signal Processing Algorithms for Beamforming and Direction Finding
… of beamforming and direction of arrival (DOA) estimation. In the beamformer design, we employ the constrained minimum variance (CMV) and the constrained constant modulus (CCM) criteria to propose full-rank and reduced-rank adaptive algorithms. Specifically, for the full-rank algorithms, we …
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Electromagnetic Vector-Sensor Direction-of-Arrival Estimation in the Presence of Interference
… narrowband direction-of-arrival (DOA) estimation in the presence of interference. The approach in this thesis relies on a high-resolution ESPRIT-based algorithm. Unlike spatially displaced arrays, the sensor cannot estimate the DOA of sources using phase differences between the …
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Time Delay Estimate Based Direction of Arrival Estimation for Speech in Reverberant Environments
Time delay estimation (TDE)-based algorithms for estimation of direction of arrival (DOA) have been most popular for use with speech signals. This is due to their simplicity and low computational requirements. Though other algorithms, like the steered response power with phase transform (SRP-PHAT), …
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Performance Comparison Between Music And Esprit Algorithms For Direction Estimation Of Arrival Signals
… of Multiple Signal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) for the estimation of Direction of Arrival (DOA) of incoming signals to the smart antenna. The comparison of these two algorithms was done on the basis of parameters like …
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Discrete and Continuous Sparse Recovery Methods and Their Applications
… eliminate the existing off-grid mismatches for DOA estimation. In the second topic, we focus on the analysis model, with an emphasis on efficient algorithms and performance analysis.</p><p>In considering the sparse recovery method with structured dictionary mismatches for the synthesis model, we …
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Direction of arrival estimation for spinning antenna based electronic intelligence systems
… accurately estimating the direction of arrival (DOA) of the received signals, provided that: the antenna's beamwidth is narrow; the received data is fully spread across the antenna mainlobe; the number of data samples is large; the signal to disturbance ratio (SDR) is large. However, the …
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Wireless Sensing and Fusion using Deep Neural Networks
… of array processing, we solve the Model order estimation (MOE) problem, a prerequisite for Direction of Arrival (DoA) estimation in the presence of correlated multipath, a well-known difficult problem. Due to the limits imposed by array geometry, it is not possible to estimate spatial …
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Direction of arrival estimation using antenna arrays
… is an extensive study of various high resolution DOA estimation algorithms. The algorithms studied include subspace-based techniques such as the MUSIC (MUltiple Signal Classification) and ESPRIT (Estimation of Signal Parameters via Rotational Invariance) algorithm, and the integrated approaches …
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An Information-Theoretic Examination of Next Generation Location Systems: The Role of LEOs, RISs and the Near Field
… includes 3D position, velocity, and orientation estimation. However, using LEO satellites for localization introduces significant challenges, including ionospheric delays, high Doppler shifts, limited synchronization due to the absence of atomic clocks, and uncertainty in satellite ephemeris …
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A correlation-based method for direction finding of multipath signals in frequency hopping systems
… solve the problem of direction-of-arrival (DOA) estimation for narrowband signals, and usually these methods require that the number of array elements be larger than the number of signal sources. In military communications and some short-range wireless communication systems (e.g. …
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Design and Implementation of System Components for Radio Frequency Based Asset Tracking Devices to Enhance Location Based Services. Study of angle of arrival techniques, effects of mutual coupling, design of an angle of arrival algorithm, design of a novel miniature reconfigurable antenna optimised for wireless communication systems
The angle of arrival estimation of multiple sources plays a vital role in the field of array signal processing as MIMO systems can be employed at both the transmitter and the receiver end and the system capacity, reliability and throughput can be significantly increased by using array signal …
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A binaural sound sources localisation application for smart phones
… algorithm was chosen as the underlying core DOA algorithm due to its suitability for pair-wise localization as highlighted in literature. A stochastic power accumulation algorithm was designed and implemented to improve estimation outcomes by GCC-PHAT. This algorithm was based on inspiration …
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Development of a Single-Channel Direction Finding Algorithm
… receivers to estimate the direction-of-arrival (DOA) of a targeted emitter using characteristics of the signal received at each of the antennas in the array. In general, DF systems can be classified both by the number of receivers employed as well as which characteristics of the received signal …
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