Index Catalog // ScholarsArchive@OSU

Design techniques for wideband low-power Delta-Sigma analog-to-digital converters

Creator:: Wang, Yan
Abstract:: Delta-Sigma (ΔΣ) analog-to-digital converters (ADCs) are traditionally used in high quality audio systems, instrumentation and measurement (I&M) and biomedical devices. With the continued downscaling of CMOS technology, they are becoming popular in wideband applications such as wireless and wired communication systems,high-definition television and radar systems. There are two general realizations...
Resource Type:: Dissertation

A high power emulation of a wind farm

Creator:: Lalla, Chelsea
Abstract:: As more wind farms are connected to the grid, the variable nature of wind energy begins to influence grid stability. Energy storage could help smooth the variable nature of wind energy. Laboratory demonstration and exploration of the interaction between different energy storage devices and wind energy could help improve and...
Resource Type:: Masters Thesis

Some communication algorithms for Gaussian and Eisenstein-Jacobi networks

Creator:: Albader, Bader
Abstract:: Interconnection networks play important roles in designing high performance computers. Recently two new classes of interconnection networks based on the concept of Gaussian and Eisenstein-Jacobi integers were introduced. In this research, efficient routing and broadcasting algorithms for these networks are developed. Furthermore, constructing edge disjoint Hamiltonian cycles in Gaussian networks...
Resource Type:: Dissertation

The dynamic speculation and performance prediction of parallel loops

Creator:: Zier, David A.
Abstract:: General purpose computer systems have seen increased performance potential through the parallel processing capabilities of multicore processors. Yet this potential performance can only be attained through parallel applications, thus forcing software developers to rethink how everyday applications are designed. The most readily form of Thread Level Parallelism (TLP) within any...
Resource Type:: Dissertation

Quality assessment strategies for multi-camera panorama video

Creator:: Leorin, Simone
Abstract:: New video-conference devices based on omnidirectional multi-camera systems have been emerging in the last few years. These devices require innovative and automated video quality assessment in the earlier stages of their design in order to guarantee competitive product development and quality monitoring. Current quality assessment techniques are not adequate since...
Resource Type:: Masters Thesis

Diversity combining ARQ over the m(> 2)-ary unidirectional channel

Creator:: Elarief, Noha
Abstract:: In diversity combining automatic repeat request (ARQ), erroneous packets are combined together forming a single, more reliable, packet. In this thesis, we give a diversity combining scheme for the m-ary unidirectional channel. A system using the given scheme with a t-unidirectional error detecting code is able to correct up to...
Resource Type:: Masters Thesis

Power efficient H.264 video decoding in embedded multiprocessor

Creator:: Kim, Jihong
Abstract:: This thesis presents a novel methodology that enables power efficient video decoding in an embedded system based on MPSoC (Multiprocessor System on Chip). This methodology is a physical combination of parallel processing which reduces power consumption of processors by exploiting thread-level parallelism and Dynamic Voltage Frequency Scaling (DVFS) that allows...
Resource Type:: Masters Thesis

Data processing for anomaly detection in web-based applications

Creator:: Gaarudapuram Sriraghavan, Rajagopal
Abstract:: Web applications are popular attack targets. Misuse detection systems use signature databases to detect known attacks. However, it is difficult to keep the database up to date with the rate of discovery of vulnerabilities. They also cannot detect zero-day attacks. By contrast, anomaly detection systems learn the normal behavior of...
Resource Type:: Masters Thesis

Power reduction of MPEG video decoding for mobile multimedia systems

Creator:: Lewis, James M.
Abstract:: The purpose of this thesis is to explore methods which can reduce the power dissipation of a mobile system while decoding MPEG video. MPEG decoding is a microprocessor intensive process that makes heavy use of both the L1 and L2 caches as well as main memory. The heavy load placed...
Resource Type:: Masters Thesis

Network coding in relay networks

Creator:: Alban, Eduardo
Abstract:: Transmission over wireless networks presents multiple technical challenges due to noise, interference, fading, power constraints and bandwidth limitation. Different solutions have been propposed to overcome these issues and some of them are treated here. Cooperative diversity has been proposed as an implementation for networks where terminals are restricted to using...
Resource Type:: Masters Thesis

Low-complexity high-speed VLSI design of low-density parity-check decoders

Creator:: Cui, Zhiqiang
Abstract:: Low-Density Parity-check (LDPC) codes have attracted considerable attention due to their capacity approaching performance over AWGN channel and highly parallelizable decoding schemes. They have been considered in a variety of industry standards for the next generation communication systems. In general, LDPC codes achieve outstanding performance with large codeword lengths (e.g.,...
Resource Type:: Dissertation

A genetic algorithm for the vehicle routing problem with heterogeneous vehicles from multiple depots, allowing multiple visits

Creator:: Lim, Hyunpae
Abstract:: In the thesis, an application of a genetic algorithm (GA) is considered to solve the vehicle routing problem (VRP) which involves heterogeneous vehicles to serve known customer demands from multiple depots achieving the minimum delivery cost, where each customer must be satisfied by one or more visit(s), and each vehicle...
Resource Type:: Masters Thesis

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

Instruction fetching, scheduling, and forwarding in a dynamic multithreaded processor

Creator:: Browning, Adam W.
Abstract:: Dynamic multithreaded processors attempt to increase the performance of a single sequential program by dynamically extracting threads from sources such as loop iterations. The scheduling of instructions in such a processor plays a vital role in the amount of thread level parallelism that can be extracted and thus the overall...
Resource Type:: Masters Thesis

Single-level dynamic register caching architecture for high-performance superscalar processors

Creator:: Liebert, John A.
Abstract:: The amount of instruction level parallelism (ILP) that can be exploited depends greatly on the size of the instruction window and the number of in-flight instructions the processor can support. However, this requires a register file with a large set of physical registers for renaming and multiple ports to provide...
Resource Type:: Masters Thesis

Asymmetric clustering using a register cache

Creator:: Morrison, Roger Allen
Abstract:: Conventional register files spread porting resources uniformly across all registers. This paper proposes a method called Asymmetric Clustering using a Register Cache (ACRC). ACRC utilizes a fast register cache that concentrates valuable register file ports to the most active registers thereby reducing the total register file area and power consumption....
Resource Type:: Masters Thesis

A channelized digital receiver design for UWB sytems in a multipath indoor environment

Creator:: Chang, Yuhao
Abstract:: This thesis presents a channelized digital receiver design for UWB sytems in a multipath indoor environment. The UWB technology has been used for commercial and military purposes due to a number of advantages such as low-power consumption, noise-like and carrier free. The energy of UWB signal is spread over a...
Resource Type:: Masters Thesis

Channel estimation and data detection for mobile MIMO OFDM systems

Creator:: Gao, Jie
Abstract:: Designing spectral efficient, high-speed wireless links that offer high quality- of-service and range capability has been a critical research and engineering challenge. In this thesis, we mainly address the complexity and performance issues of channel estimation and data detection in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems over...
Resource Type:: Dissertation

ScholarsArchive@OSU

Design techniques for wideband low-power Delta-Sigma analog-to-digital converters

A high power emulation of a wind farm

Some communication algorithms for Gaussian and Eisenstein-Jacobi networks

The dynamic speculation and performance prediction of parallel loops

Quality assessment strategies for multi-camera panorama video

Diversity combining ARQ over the m(> 2)-ary unidirectional channel

Power efficient H.264 video decoding in embedded multiprocessor

Data processing for anomaly detection in web-based applications

Power reduction of MPEG video decoding for mobile multimedia systems

Network coding in relay networks

Low-complexity high-speed VLSI design of low-density parity-check decoders

A genetic algorithm for the vehicle routing problem with heterogeneous vehicles from multiple depots, allowing multiple visits

Gray codes and their applications

Instruction fetching, scheduling, and forwarding in a dynamic multithreaded processor

Single-level dynamic register caching architecture for high-performance superscalar processors

Asymmetric clustering using a register cache

A channelized digital receiver design for UWB sytems in a multipath indoor environment

Channel estimation and data detection for mobile MIMO OFDM systems

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