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 25 for “"Successive interference cancellation"”.
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Improved successive interference cancellation schemes using selective pre-cancellation and cross- correlation
… the computation complexity and processing time. Interference cancellation (IC) schemes allow BER improvement at the cost of processing time and complexity. We propose an alternate implementation called cross-correlation implementation (CCI) that can be applied to any IC scheme to reduce the …
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Multi-rate access schemes and successive interference cancellation for wireless multimedia MC-CDMA communications
… MC-CDMA is mainly limited by multiple access interference (MAI). For example, in the MFSL MC-CDMA systems, the interference is not only presented among different users, but also among different symbols of the same user transmitted in parallel on different spreading codes. To mitigate this …
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Analyzing performance of SIC with multiple power multichannel Aloha
This thesis analyzes the performance of successive interference cancellation (SIC) when used with multiple power, multichannel Aloha. We use the fluid model to analyze the performance of the system under various circumstances. We also simulate the performance of a SIC system over a single channel. …
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Capactiy of single-hop communication links in wireless ad hoc networks
… components are implemented. These include successive interference cancellation (SIC), and multiple antenna arrays at the transmitting and the receiving end of the link. These strategies are then compared in terms of the dB improvement of capacity that they provide. Network parameter NP is …
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Communication strategies for the MIMO interference channel
Managing interference for wireless networks is crucial for meeting future demand for higher mobile data rates. Interference can be viewed through the interference channel (IC) in which pairs of transmitters and receivers interfere with each other, so an interesting way to manage interference is to …
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Receiver Implementations for a CDMA Cellular System
… system (IS-95). In CDMA systems, multiple access interference limits the capacity of any system using conventional single user correlation or matched filter receivers. Previous research has shown that multiuser detection receivers that employ interference cancellation techniques can significantly …
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Polarization Reconfigurable Non-Orthogonal Multiple Access (PR-NOMA) for Next Generation Communication Systems
… The concepts of power allocation together with successive interference cancellation (SIC) and the polarization are proven to be a promising mechanism for improving data stream by way of antenna polarization adjustments. In this thesis, a detailed mathematical derivation and comprehensive …
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Joint relay beamforming and transceiver processing in multiuser relay network
… processing to maximize the minimum signal-to-interference-and-noise ratio (SINR) under a relay power budget. The joint optimization problem is iteratively solved by designing relay beam matrix and receiver processing matrix. For the latter, both maximum-ratio-combining (MRC) receiver and …
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Novel Approaches to Overloaded Array Processing
… overloaded environment through the use of MMSE interference rejection filtering embedded in a successive interference cancellation (SIC) architecture. The second receiver architecture enhances signal extraction performance by embedding a stronger interference rejection receiver, the …
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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 …
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On the Use of Deep Learning Models for Interference Detection and Mitigation
Interference and noise are two of the primary factors that degrade the reliability of wireless communication systems. With the rapid expansion of satellite communication networks, the radio frequency spectrum has become increasingly congested, creating severe challenges not only for general …
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Multiuser Detection for Pulse Amplitude Modulated Signals
… overlapping transmissions to reduce inter-user interference and improve system performance. One main application for MUD research has been reducing inter-user interference in Code-Division Multiple Access (CDMA) channels with performance degradation caused by the near-far effect. In this thesis, …
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Turbo space-time coding for mimo systems : designs and analyses
… encoding structure and a low complexity parallel interference cancellation (PlC) receiver is shown to achieve close to capacity performance. For high order modulation, another type of LTST with a horizontal encoding structure, TVLT, and an ordered successive interference cancellation (OSIC) …
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Cross-Layer Optimization: System Design and Simulation Methodologies
… problem. Finally, the interaction between successive interference cancellation (SIC) receivers at the physical layer and power control, which is a layer 2 radio resource management issue, is studied. Traffic for future wireless networks is expected to be a mix of real-time traffic such as …
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Transmission and detection for space-time block coding and v-blast systems
… A polygon searching algorithm and an ordered successive interference cancellation (O-SIC) sphere searching algorithm are major components of the proposed multi-step ML detectors. At reasonable high SNRs, our algorithms have low complexity comparable to that of O-SIC algorithm, while they …
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Advanced Interference Suppression Techniques for Spread Spectrum Systems
… the performance of these systems is limited by interference. A number of different interference suppression techniques have been proposed, including multiuser detection, beamforming, adaptive supervised and blind algorithms, and transmit processing techniques requiring a limited feedback …
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Application of integer quadratic programming in detection of high-dimensional wireless systems
… widely used detection schemes for MIMO OFDM: (1) Successive Interference Cancellation (SIC) and (2) Iterative Detecting and Decoding (IDD). First, SIC-based algorithms are derived via a QP formulation in contrast to using a linear MMSE detector at each stage. The resulting QP-SIC algorithms offer …
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Adaptive DS-CDMA multiuser detection for time variant frequency selective Rayleigh fading channel
… capacity is also limited by multiple accessed interference (MAI) signals. This work focuses on the development of adaptive algorithms for multiuser detection (MUD) and interference suppression for wideband direct sequence code division multiple access (DS-CDMA) systems over time-variant …
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Self-concatenated coding for wireless communication systems
… At the destination, the amalgamated block of Successive Interference Cancellation (SIC) scheme combined with SECCC then detects and decodes the signal either with or without the aid of a priori information. Our simulation results demonstrate that the proposed scheme is capable of reliably …
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On Programmable Control and Optimization for Multi-Hop Wireless Networks
… technologies, including MIMO, full duplex, and interference cancellation at the physical layer. The focus is on building tractable computational models for these wireless technologies that can be used for modeling, analysis and optimization in the centralized control plane. Problem formulation …
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