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Filtering by: Creator Celia, M. A. Remove constraint Creator: Celia, M. A. Committee Member Nguyen, Thinh Remove constraint Committee Member: Nguyen, Thinh Committee Member Lee, Ben Remove constraint Committee Member: Lee, Ben

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  • On edge disjoint Hamiltonian cycles in torus and Gaussian networks

    Creator:
    Alazemi, Fawaz M.
    Abstract:
    Many algorithms in parallel systems can be easily solved if we can generate a Hamiltonian cycle on the underly network. Finding Hamiltonian cycle is a well known NP-complete problem. For specific instances of regular graphs, such as Torus and Gaussian network, one can easily find Hamiltonian cycles. In this thesis,...
    Resource Type:
    Masters Thesis
    Full Text:
    of size m into md/2 = 2m d parts and send each part on a different Hamiltonian cycle. Hence, we

  • Transmission and Combining for Hybrid Automatic Repeat Request in Multiple-Input Multiple-Output Systems

    Creator:
    Whang, Younghoon
    Abstract:
    Hybrid automatic repeat request (HARQ) schemes combine packet retransmission with forward error correction to ensure a reliable communications. In multiple-input multiple output (MIMO) systems, interference cancellation (IC) detection is widely used where the detection and cancellation steps of the simultaneously transmitted data streams occur. In principle, the signal stream estimated...
    Resource Type:
    Dissertation
    Full Text:
    combine packet retransmission with forward error correction to ensure a reliable communications. In

  • Predicting and Improving Throughput, Responsiveness and Battery Life of Computer Systems by Machine Learning

    Creator:
    Li, Yunfan
    Abstract:
    The Machine Learning (ML) algorithms are increasingly explored in varies of fields including designing and optimizing computer systems. Recent research, such as optimizing memory/cache prefetching by ML training or predicting traffic pattern in throughput processors, also exhibits a promising future of introducing ML into computer system design and optimization. Throughput...
    Resource Type:
    Dissertation
    Full Text:
    a promising future of introducing ML into computer system design and optimization. Throughput

  • Efficient detection and scheduling for MIMO-OFDM systems

    Creator:
    Liu, Wei
    Abstract:
    Multiple-input multiple-output (MIMO) antennas can be exploited to provide high data rate using a limited bandwidth through multiplexing gain. MIMO combined with orthogonal frequency division multiplexing (OFDM) could potentially provide high data rate and high spectral efficiency in frequency-selective fading channels. MIMO-OFDM technology has been widely employed in modern communication...
    Resource Type:
    Dissertation
    Full Text:
    dimension. The channel matrix H has a dimension of N × M , and its mth column, hm, represents the channel

  • Deletions and Insertions of the Symbol 0 and Asymmetric/Unidirectional Error Control Codes for the L₁ Metric

    Creator:
    Alqwaifly, Nawaf
    Abstract:
    This work gives some theory and efficient design of binary block codes capable of controlling the deletions of the symbol “0” (referred to as 0-deletions) and/or the insertions of the symbol “0” (referred to as 0-insertions). This problem of controlling 0-deletions and/or 0-insertions (referred to as symmetric 0-errors) is shown...
    Resource Type:
    Dissertation
    Full Text:
    for m = 2 [21]. If instead, A = ZZ∞ = IIN, then we can define(n w ) ∞ def = |S(IIN,n,w)| and note

  • Gray codes and their applications

    Creator:
    Anantha, Madhusudhanan
    Abstract:
    An n-bit Gray code is an ordered set of all 2n binary strings of length n. The special property of this listing is that Hamming distance between consecutive vectors is exactly 1. If the last and first codeword also have a Hamming distance 1 then the code is said to...
    Resource Type:
    Dissertation
    Full Text:
    ≤ m. We denote this graph as CN(j1, j2, . . . , jm). It is clear that a circulant graph CN(j1, j2

  • Efficient multiuser cooperative relay communications employing layered modulations

    Creator:
    Whang, Roderick Jaehoon
    Abstract:
    Relay-assisted cooperative communications are promising solutions for error-performance improvement and cell coverage extension. In this thesis, we propose several efficient cooperative relay communication schemes. First, an efficient space-time coded cooperative relay communications scheme that employs linear precoding and transmission-pattern selection is proposed. This is built upon an existing block linear...
    Resource Type:
    Dissertation
    Full Text:
    in order to improve the diversity performance of a multihop relay network. Second, we consider

  • Evolutionary Approach to Efficient Provisioning and Self-organization in Wireless Sensor Networks (WSN)

    Creator:
    Khanna, Rahul, 1966-
    Abstract:
    Advances in low-power digital integration and microelectro-mechanical systems (MEMS) have paved the way for micro-sensors. These sensors are equipped with data processing capabilities along with sensory circuits. Sensor data are processed on these individual sensors and transmitted to the target (sink). Lowcost integration and small sizes of these sensors have...
    Resource Type:
    Dissertation
    Full Text:
    processing capabilities. Large number of such sensors along with these constraints creates a sensor