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 16 of 16 for “"NLMS"”.
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BER Modeling for Interference Canceling Adaptive NLMS Equalizer
… to model the BER behavior of the adaptive NLMS equalizer. Simulation results show unsatisfactory performance of the model. A detailed discussion is presented that points out the limitations of the GMSSW model, thereby providing some insight into the non-Wiener behavior of (N)LMS equalizers. …
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Non-Wiener Characteristics of LMS Adaptive Equalizers: A Bit Error Rate Perspective
… state BER performance of the normalized LMS (NLMS) equalizer operating in the presence of a strong narrowband interference. Initial observations showed that a 2 dB improvement in MSE may result in two orders of magnitude improvement in BER. However, some differences in the MSE and BER behavior …
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Implementation and evaluation of echo cancellation algorithms
… the Least Mean Squares (LMS), Normalized LMS (NLMS), Recursive Least Squares (RLS), and Subband NLMS (SNLMS) algorithms, and evaluate their performance as acoustic and network echo cancelers. The algorithms are compared based on their convergence rate, steady state echo return loss (ERL), and …
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On Ways to Improve Adaptive Filter Performance
… algorithm with Orthogonal Correction Factors (NLMS-OCF). The NLMS-OCF algorithm updates the adaptive filter coefficients (weights) on the basis of multiple input signal vectors, while NLMS updates the weights on the basis of a single input vector. The well-known Affine Projection Algorithm …
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Exploration of alternative algorithms for multi-channel acoustic echo cancellation
… work. The Normalized Least Mean Squares filter (NLMS) serves as a benchmark for the Kalman filter. Simulations using room recordings and measured room responses are employed in this exploration. Useful metrics such as the Word Error Rate (WER) and Echo Return Loss Enhancement (ERLE) help to …
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On the evaluation and application of neural language models for grammatical error detection
… This thesis explores whether information from NLMs can positively transfer to GED within the domain of learning English as a second language (ESL), and looks at whether NLMs encode and make use of linguistic signals that would facilitate robust and generalisable GED performance. First, I …
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Adaptive Beamforming Using a Microphone Array for Hands-Free Telephony
… The sidelobe canceler is evaluated using both NLMS and RLS adaptation. The RLS algorithm inherently gives better results than the NLMS algorithm, though the computational complexity renders the solution impractical for implementation with today's technology. A testing setup is presented which …
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Adaptive detection in ultrawide bandwidth wireless communication systems
… (LMS), normalised least-mean squares (NLMS) and recursive least square (RLS) algorithms. In our study decision directed (DD) approaches are also introduced to the adaptive detectors to improve the BER performance and spectral-efficiency of the hybrid DS-TH UWB systems. Our studies show …
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CALaMo: a Construsctionist perspective on the Analysis of linguistic behaviour of Language Models
In recent years, Neural Language Models (NLMs) have consistently demonstrated increasing linguistic abilities. However, the extent to which such networks can actually learn grammar remains an object of investigation, and experimental results are often inconclusive. Notably, the mainstream …
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Fast Algorithms for Volterra-Series-Based Nonlinear Adaptive Filters
… input. Because of the improved conditioning, the NLMS and data-reusing NLMS algorithms can achieve rapid convergence rate for third-order adaptive Volterra filter with very low computational complexity. The quasi-Newton algorithm is also applied to the third-order adaptive Volterra filter to …
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Adaptive noise cancellation using multichannel lattice structure.
… noise cancellation procedure involves the NLMS adaptive algorithm. The performance of the new technique using different types of transmission channels, different types of reference inputs and different types of noise-free primary inputs are examined analytically. The new approach is …
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Constrained Linear and Non-Linear Adaptive Equalization Techniques for MIMO-CDMA Systems
… the case of the normalized least mean squared (NLMS) algorithm. Thus, in this work both linear and non-linear decision feedback (DFE) equalizers for MIMO systems with least mean square (LMS) based constrained stochastic gradient algorithm have been designed. More specifically, an LMS algorithm …
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Phenotyping Behavioral Disorders in REM Sleep: Study of Digital Biomarkers of Neurodegeneration
… Sigmoid Normalized Least Mean Square (AS-NLMS), was developed to address the challenges of artifact removal in dynamic and non-linear environments. The findings presented in this thesis underscore the transformative potential of interdisciplinary research, where engineering and medicine …
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Long polyphase sequences for adaptive mmse detector in asynchronous cdma plc network with impulsive noise
… polifasicas. Se examinan los algoritmos NLMS y RLS, y se propone una version mejorada de este ultimo que resulta menos vulnerable al ruido impulsional. Para SNR altas la interferencia de acceso multiple degrada el rendimiento del receptor adaptativo usando secuencias binarias largas, …
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Non-Wiener Effects in Narrowband Interference Mitigation Using Adaptive Transversal Equalizers
The least mean square (LMS) algorithm is widely expected to operate near the corresponding Wiener filter solution. An exception to this popular perception occurs when the algorithm is used to adapt a transversal equalizer in the presence of additive narrowband interference. The steady-state LMS …
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Stereophonic Acoustic Echo Cancellation: Theory and Implementation
The thesis treats theory and implementation aspects for stereophonic acoustic echo cancellation. In Paper I a complete implementation of a stereophonic acoustic echo canceler based on the two-channel fast recursive least-squares algorithm is presented. An analysis of the system calculation …