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 22 for “"symbol detection"”.
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MIMO-OFDM Symbol Detection via Echo State Networks
… weights. This thesis considers applying ESN for symbol detection in multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems. A new ESN structure, namely, windowed echo state networks (WESN) is introduced to further improve the symbol detection performance. …
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Partial Symbol Detection Based Energy-Efficient Receiver for Short-Reach Optical Communication
… data centers. It introduces a partial symbol detection (MSB)-based equalization scheme that can significantly reduce hardware complexity for multilevel signaling. The design detects MSB bits from the incoming signal and uses MSB decisions to mitigate ISI from MSB transitions. This …
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Lattice reduction for MIMO detection: from theoretical analysis to hardware realization
… between the algorithm and hardware aspects of symbol detection that is enhanced by lattice reduction (LR) preprocessing for wireless MIMO communication systems. The motivation for this work stems from the need to improve the bit-error-rate performance of conventional, low-complexity detectors …
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Low-Complexity Iterative Receiver Design for Multi-Carrier Faster-Than-Nyquist Signaling Over Frequency-Selective Fading Channel
… faster-than-Nyquist (MFTN) signaling reduces the symbol period satisfying the Nyquist criterion in the time domain and the minimum spacing of orthogonal subcarriers in the frequency domain for remarkably improving the spectral efficiency, which still occupies the same frequency bandwidth. However, …
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Online Machine Learning for Wireless Communications: Channel Estimation, Receive Processing, and Resource Allocation
… for three communication applications: 1). Symbol detection, where real-time online learning-based symbol detection algorithms are designed for MIMO-OFDM and massive MIMO-OFDM systems by utilizing reservoir computing, extreme learning machine, multi-mode reservoir computing, and StructNet; …
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Towards NextG Receiver: Online Real-Time Machine Learning with Domain Knowledge for Wireless Communications
… frequency-division multiplexing (OFDM) symbol detection, orthogonal time frequency space (OTFS) symbol detection, and MIMO-OFDM channel estimation task. To enable efficient learning, domain knowledge, such as the symmetric structure of the modulation constellation, the delay-Doppler (DD) …
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Automatic Modulation Classication and Blind Equalization for Cognitive Radios
… fading not only affects the performance of symbol detection by causing inter symbol interference (ISI) but also affects the performance of the AMC. The equalizer is a signal processing component that removes ISI from the received signal, thus improving the symbol detection performance. In a …
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Algorithms for channel impairment mitigation in broadband wireless communications
… is proposed for joint interference rejection and symbol detection in FH systems. For SISO/MIMO-OFDM systems, recursive least square (RLS)-based approaches are proposed for joint channel estimation and synchronization in both uncoded and coded transmissions. The performance of the proposed …
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Channel estimation in a two-way relay network
… channel estimation is necessary for coherent symbol detection. This thesis considers a network which consists of two transceivers communicating with the help of a relay applying the amplify-and-forward (AF) relaying scheme. The training based channel estimation technique is applied to the …
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Statistical inference with unreliable binary observations
… parameter estimation, classification, and signal detection. We derive a mathematical model of this system and apply information-theoretic tools to describe the achievable performance of such a converter in information processing systems. In particular, we find asymptotic expressions for Fisher …
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Iterative detection for overloaded OFDMA with spatial diversity
… multiple antenna receivers with multiuser detection methods are necessary. The focus of this thesis will be the formulation of an iterative multiple antenna receiver framework for overloaded uplink OFDMA systems. Specifically, we formulate optimal MAP and reduced complexity MMSE symbol …
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Mantle thermal evolution of tidally-locked super-earths
Most super-Earth (mass < 10M[mathematical symbol]) detection techniques are biased towards massive planets with close-in orbits. A planet's orbital decay timescale decreases with a lower semi-major axis, thereby providing a high probability of detecting exoplanets which are in tidal-lock with their …
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Machine Learning-Based Receiver in Multiple Input Multiple Output Communications Systems
… a variety of neural network structures for symbol detection/equalization tasks in MIMO systems configured with two different waveforms, orthogonal frequency-division multiplexing (OFDM) and orthogonal time frequency and space (OTFS). The former one is the major air interface in current …
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A Cost-Efficient Digital ESN Architecture on FPGA
… verified with the classical NARMA dataset, and a symbol detection task for an orthogonal frequency division multiplexing (OFDM) system on a wireless communication testbed. In the worst-case scenario, our proposed architecture delivers a matching bit error rate (BER) compares to its corresponding …
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Deep learning for digitising complex engineering drawings.
… recognising all drawing components which are the symbols, text and connections. Although there has been significant improvement in computer vision due to the development of deep learning, the same progress has not been seen for engineering drawing digitisation. Most of these methods were based on …
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Moving Toward Intelligence: A Hybrid Neural Computing Architecture for Machine Intelligence Applications
… (iii) speech recognition, (iv) modulation symbol detection, (v) radio fingerprint identification, and (vi) clinical disease identification.
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Advances in Iterative Probabilistic Processing for Communication Receivers
… is to approximate maximum a posteriori (MAP) symbol-by-symbol detection of the information bits and estimation of the unknown channel or signal parameters. The sum-product algorithm is capable of efficiently approximating the marginal posterior probabilities desired for MAP detection and …
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Optical fibre communication over a noisy partially coherent channel
… The most celebrated technologies of coherent detection and wavelength-division multiplexing (WDM), widely deployed in long-haul links, are gaining ground in access networks, which is particularly challenging due to the shared-cost requirements, leading to denser channel spacings and the use of …
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Pre-equalization for pre-Rake MISO DS-UWB systems
… (DS-UWB) systems with pre-Rake combining and symbol-by-symbol detection. The first pre-equalization filter (PEF) scheme employs one PEF per transmit antenna, whereas in the second, simplified PEF (S-PEF) scheme all transmit antennas share the same PEF. For both schemes the optimum finite …
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Adaptive iterative multiuser detection for 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 channel-parameter estimates is unavailable at the receiver, a pilot (training) sequence is applied in the communication system, to learn the channel state …
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