Index Catalog // ScholarsArchive@OSU

Conserving energy in TCP for mobile ad-hoc networks

Creator:: Agarwal, Sandeep, 1973-
Abstract:: The widespread use of TCP as a transport layer protocol for mobile ad-hoc networks and wireline networks has motivated the need to make its implementation highly power efficient specially with respect to ad hoc radio networks. Over the past years many researchers have developed energy efficient protocols for mobile ad-hoc...
Resource Type:: Masters Thesis

DC notch filter offset cancellation for direct-conversion receivers

Creator:: Pan, Dongling
Abstract:: Direct-conversion architecture would dominate the modern low power wireless receiver architecture if problems such as offset cancellation, even-order distortion, and flicker noise were solved. Among those problems, offset is the most serious one. This thesis will discuss and analyze one approach to cancel offsets in direct-conversion receivers. First, we explain...
Resource Type:: Masters Thesis

Complexity and performance analysis of turbo decoders for wireless communication systems

Creator:: Rangarajulu, Suresh
Abstract:: The quest to achieve reliable communication has always existed. Error Correcting codes have made communication systems even more reliable under high signal to noise ratios. A new class of codes called Turbo codes have proved to be more effective compared to the other classes of codes and achieve performance close...
Resource Type:: Masters Thesis

Adaptive dual-loop algorithm for cancellation of time-varying offsets in direct conversion mixers

Creator:: Holenstein, Christian
Abstract:: The thesis presents a new algorithm and structure that is to be used in conjunction with a specially modified CMOS Gilbert cell mixer to remove time-varying DC offsets in direct conversion receivers. In our approach, the DC offset is detected at the output of the mixer using a dedicated coarse...
Resource Type:: Masters Thesis

A 2.4GHZ direct conversion mixer with offset cancellation

Creator:: Schmidbauer, Hardy
Abstract:: Dynamic DC offset is one of the biggest problems preventing the implementation of single chip receivers. This thesis presents a 2.4GHz downconversion mixer designed to work with adaptive DC offset cancellation for a fully integrated direct conversion receiver. Offset can be removed by dynamically changing the PFET load bias in...
Resource Type:: Masters Thesis

Stretchable architectures for 3rd generation wireless networks

Creator:: Lakkavalli, Shashidhar V.
Abstract:: Power is a valuable resource. It is invaluable when for mobile devices. Mobile devices, due to their mobility cannot get a continuous source of power and derive their power from a battery contained in them. The main consumer of power in the mobile is its transmitter. With a limited power...
Resource Type:: Masters Thesis

Implementation and performance analysis of a scalable routing protocol

Creator:: Venkatesan, Rudhrakumar
Abstract:: Ad Hoc networks are multi-hop wireless networks consisting of mobile hosts. They do not have any pre-existing network infrastructure and are characterized by constantly changing topology, limited battery power and bandwidth. Typical applications of such networks are battlefield networks, medical relief during natural calamities or disasters, conference room networking, and...
Resource Type:: Masters Thesis

Ensuring quality of service in ad-hoc wireless networks using the concept of active nodes

Creator:: Rajogpalan, Santosh
Abstract:: The problem of ensuring Quality of Service (QoS) on a TCP/IP based fixed-infrastructure network has been well studied and several working proposals exist. An allied problem is that of ensuring QoS on an ad-hoc wireless network, where the requirements are similar, but the operating conditions are different enough to warrant...
Resource Type:: Masters Thesis

LDPC-VBLAST for wireless communications

Creator:: Poocharoen, Panupat
Abstract:: Recently, the demand for higher data rates of transmission has increased in many wireless communication applications. Using multi-transmit and multi-receive antennas has been shown to be a solution, since it can increase the channel capacity to accommodate higher transmission rates. Among the popular techniques developed to exploit the use of...
Resource Type:: Masters Thesis

Adaptive semi-soft handoff for cellular IP networks

Creator:: Nurvitadhi, Eriko
Abstract:: Rapid advances in wireless networking have led to more mobile phones, PDAs, and other digital mobile devices becoming ubiquitously connected to the Internet. As the demand of delay sensitive real-time applications for these portable devices increases, providing seamless connectivity to wireless networks becomes a critical issue. For this reason, a...
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

ScholarsArchive@OSU

Conserving energy in TCP for mobile ad-hoc networks

DC notch filter offset cancellation for direct-conversion receivers

Complexity and performance analysis of turbo decoders for wireless communication systems

Adaptive dual-loop algorithm for cancellation of time-varying offsets in direct conversion mixers

A 2.4GHZ direct conversion mixer with offset cancellation

Stretchable architectures for 3rd generation wireless networks

Implementation and performance analysis of a scalable routing protocol

Ensuring quality of service in ad-hoc wireless networks using the concept of active nodes

LDPC-VBLAST for wireless communications

Adaptive semi-soft handoff for cellular IP networks

Network coding in relay networks

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