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 24 for “"interference channel"”.
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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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Optimal Sum-Rate of Multi-Band MIMO Interference Channel
While the channel capacity of an isolated noise-limited wireless link is well-understood, the same is not true for the interference-limited wireless links that coexist in the same area and occupy the same frequency band(s). The performance of these wireless systems is coupled to each other due to …
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Approximation techniques in network information theory
… of a communication network, namely the broadcast channel, the interference channel and the relay channel, have been open problems for several decades. When exact solutions are elusive, progress can be made by seeking for approximate solutions first. The first contribution of the thesis is to …
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A framework for low-complexity iterative interference cancellation in communication systems
Communication over interference channels poses challenges not present for the more traditional additive white Gaussian noise (AWGN) channels. In order to approach the information limits of an interference channel, interference mitigation techniques need to be integrated with channel coding and …
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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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Super-quantum and quantum enhancements of two-sender channels
… capacity of classical communication over a noisy channel. Our results exhibit a trifecta of proof-of-concept channels: first, we show an interference channel between two sender-receiver pairs where the senders are not allowed to communicate, for which a shared super-quantum bit allows perfect …
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Interference channels with half-duplex source cooperation
… source cooperation is studied for Gaussian interference channels. The source cooperation is in-band, meaning that each source can listen to the other source's transmission, but there is no independent channel between the sources; half-duplex assumes that, at each time instant, the sources …
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Topics in Network Information Representation and Communication
… determining the capacity region of the Gaussian interference channel is discussed. New outer bounds on capacity are derived, and a very simple power-splitting scheme is shown to be within 1 bits/s/Hz of the capacity of the channel for all values of the channel parameters. The point-to-point …
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An interference alignment scheme for multiple multicast traffic
We propose a new coding scheme for interference alignment in a single hop fast fading wireless network with general message demands. For the X Channel, the Degrees of Freedom (DoF) region achievable by the scheme is shown to touch a known outer bound at several points. For multiple multicast …
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Fundamental Impacts Of Delay And Deadline On Communications Over Wireless Networks
… more effective communications schemes is channel state information which is available at the transmitters (CSIT). CSIT is usually provided to the transmitters via feedback channels from the receivers. Timely and accurate CSIT has been shown to provide enormous theoretical gains in terms of …
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Relay assisted device-to-device communication with channel uncertainty
… user equipment and due to the fading that the channel between these user equipment experiences. In order to fully realise the gains that direct (device-to-device) communication promises, idle user equipment can be exploited to serve as relays to enforce device-to-device communication. The …
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An information theoretic study of reduced-complexity receivers for intersymbol interference channels
… a discrete-time additive Gaussian intersymbol interference channel typically grows exponentially with the duration of the channel impulse response. Consequently, practical sub-optimal receivers are often designed as though the channel impulse response were shorter than it is. While previous …
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Interference management in wireless networks
… design of future wireless networks. Breaking the interference barrier is an important step in achieving higher throughput in both cellular and ad-hoc wireless networks. Towards this end, there has been a renewed interest in information-theoretic studies of Gaussian interference channels in recent …
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Multi-layer Optimization Aspects of Deep Learning and MIMO-based Communication Systems
… configurations; specifically, multiple access channel (MAC) and interference channel (IC). First, the ergodic sum rates of MIMO MAC and IC configurations are determined by jointly integrating the error and overhead effects due to channel estimation (training) and feedback into the rate …
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Resilient Waveform Design for OFDM-MIMO Communication Systems
… systems need a method to estimate and equalize channel, whether through channel reciprocity or sounding. Most OFDM-based MIMO systems use sounding via pilot tones. Like OFDM attacks, this research introduces MIMO channel sounding attack, which attempts to manipulate pilot tones to skew the …
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Information Theoretic Limits of State-dependent Networks
… wireless communication scenarios where there are interference cognition among transmitters. Hence, information theoretic studies of these models provide useful guidelines for designing new interference cancellation schemes in practical wireless networks.</p> <p>In particular, we first study the …
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Correlated Sources In Distributed Networks - Data Transmission, Common Information Characterization and Inferencing
… including: communicating correlated sources over interference channels, characterizing the common information among dependent random variables, and testing the presence of dependence among observations.</p> <p>It is well known that separated source and channel coding is optimal for point-to-point …
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Interference channels with coordinated multi-point transmission
… tractable way to characterize the capacity of interference channels. The considered channel model has K transmitter/receiver pairs, and each receiver is interested in one unique message from a set of K independent messages. Each message can be available at more than one transmitter. The maximum …
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Wireless Full-Duplex: From Practice to Theory
… and reception results in a large self- interference due to the proximity of transmit and receive antennas at the full-duplex node. To establish the feasibility of wireless full-duplex, we develop a wideband real-time physical layer and evaluate its performance on the WARP testbed. …
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Capacity Analysis for Gaussian and Discrete Memoryless Interference Networks
<p>Interference is an important issue for wireless communication systems where multiple</p> <p>uncoordinated users try to access to a common medium. The problem is even more</p> <p>crucial for next-generation cellular networks where frequency reuse becomes ever more</p> <p>intense, leading to more …
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