Index Catalog // ScholarsArchive@OSU

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

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

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

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

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

Data rate improvements for the IEEE 802.11 wireless local area network standard through the use of code division multiple access and turbo coding

Creator:: Buck, David H.
Abstract:: The widespread use of Wireless Local Area Networks (WLAN) and the desire for such products from different vendors to operate together has generated a movement towards standardization. Over the last decade, several organizations worldwide have researched and developed such standards, this includes the IEEE 802.11 committee. One of the important...
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

Design of 28 GHz Low-Power Phased-Array Receiver Frontend in CMOS

Creator:: Garg, Robin
Abstract:: This work presents the design and implementation of a low power phased-array receiver frontend at 28 GHz in 65 nm CMOS. The frontend incorporates a low- power low-noise amplifier(LNA) and a passive reflection-type phase shifter (RTPS) capable of providing 360° phase shift with 5-bit phase resolution and low loss variation....
Resource Type:: Masters Thesis

Dynamic Methods to Improve Streaming of H.264 HD Video Over 802.11 Wireless Networks

Creator:: Sinky, Mohammed H.
Abstract:: Wireless High Definition Video Transmission (WHDVT) over 802.11-based networks enjoys widespread deployment among today's multimedia solutions. Examples include Intel® Wireless Display and Apple Airplay®, to name a few. In these systems, peer-to-peer networks are established over which H.264-encoded video is transported wirelessly to be decoded and played back at the...
Resource Type:: Dissertation

End-to-end network throughput enhancement through physical-layer network coding

Creator:: Maeouf, Sofean Ahmed
Abstract:: Physical-Layer Network Coding (PNC) is a promising technique that has great potentials for improving the achievable data rates of end-to-end flows through higher packet transmission rates, thereby increasing the overall network throughput. In this thesis, we study the performance of the PNC transmission techniques for unidirectional end-to-end flows in multi-hop...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

A 2.4GHZ direct conversion mixer with offset cancellation

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

Adaptive semi-soft handoff for cellular IP networks

Complexity and performance analysis of turbo decoders for wireless communication systems

Conserving energy in TCP for mobile ad-hoc networks

Data rate improvements for the IEEE 802.11 wireless local area network standard through the use of code division multiple access and turbo coding

DC notch filter offset cancellation for direct-conversion receivers

Design of 28 GHz Low-Power Phased-Array Receiver Frontend in CMOS

Dynamic Methods to Improve Streaming of H.264 HD Video Over 802.11 Wireless Networks

End-to-end network throughput enhancement through physical-layer network coding

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