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 15 of 15 for “"Parallel Interference Cancellation"”.
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An FPGA-Based Multiuser Receiver Employing Parallel Interference Cancellation
… that exploit the nature of the multiple access interference (MAI). By jointly demodulating the users in the system, this interference can be characterized and reduced thus decreasing the overall probability of error in the system. Numerous multiuser structures exist, each with varying degrees of …
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Performance Evaluation of Multiuser Detectors with V-BLAST to MIMO Channel
… the MMSE receiver and the multistage parallel interference cancellation receiver in an AWGN and Rayleigh flat fading SISO channel. Next, the V-BLAST algorithm is reviewed and the error propagation of this algorithm is investigated. Then, the V-BLAST algorithm is combined with multiuser …
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Efficient Interference Cancellation Techniques for Advanced DS-CDMA Receivers
… of advanced processing techniques for multiuser interference cancellation in direct sequence code division multiple access communications. Emphasis is placed on the development of efficient techniques that are practical to implement. The work begins with a study of several sub-optimal multiuser …
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Optimization of Soft Interference Cancellation in DS-CDMA Receivers
Parallel interference cancellation for DS-CDMA has been shown to suffer from biased amplitude estimates if a matched-filter estimator is used. The bias magnitude is proportional to the number of interfering users. For heavy system loads, the bias has been shown to adversely effect the accuracy of …
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Performance of turbo multi-user detectors in space-time coded DS-CDMA systems
… of information, these receivers employ a Parallel Interference Cancellation (PIC) detector as the first receiver stage.
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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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Interference characterization and suppression for multiuser direct-sequence spread-spectrum system
… the presence of multiple-access (user-to-user) interferences (MAI) and multipath interferences. The uniqueness of our study is that in bit-error-rate evaluation, instead of approximating the interference as Gaussian noise (which has been done in most of the previous studies), we incorporate both …
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Selective Interference Cancellation and Frame Synchronization for Packet Radio
… investigates the application of multiuser interference suppression to direct-sequence code-division multiple-access (DS-CDMA) for peer-to-peer packet radio networks. The emphasis of this work is to develop and validate efficient interference suppression techniques through selective …
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A Structural Approach to Multi-User Detection
… including linear detection, successive and parallel interference cancellation, joint detection, and group detection, among others. The focus of this research is to address the problem of multi-user detection from the perspective of the physical structure of the signal constellation. Many …
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Evaluation of TDOA Techniques for Position Location in CDMA Systems
… White Gaussian Noise (AWGN), Multiple Access Interference (MAI), power control and loading. The effect of the mobile position and of different arrangement of base stations on TDOA accuracy is also studied. Performance comparison in AWGN and Rayleigh fading channels is made. The feasibility of …
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Turbo space-time coding for mimo systems : designs and analyses
… vertical 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 …
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High-Quality Detection in Heavy-Traffic Avionic Communication System Using Interference Cancellation Techniques
… quantifying the effects of multi-user co-channel interference for an avionic communication system operating in a heavy-traffic aeronautical mobile environment and proposes advanced interference cancellation techniques to mitigate the interference. The dissertation consists of two parts. The first …
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The Global Navigation System Scope (GNSScope): a toolbox for the end-to-end modelling simulation and analysis of GNSS
… weak signals, multipath, and multiple access interference in GNSScope. The Mirrored Channel Mitigation Technique, based on the successive and parallel interference cancellation techniques, reduces the hardware complexity of the interference mitigation process by utilizing the local code and …
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Reduced Rank Adaptive Filtering Applied to Interference Mitigation in Wideband CDMA Systems
… system to perform multiuser detection (MUD) or interference suppression (IS) with no loss in performance and significant signal subspace compression better than any previous reduced rank techniques have shown. This is important for optimizing performance because it implies a reduction in the …
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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 …