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  • 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
    Full Text:
    AN ABSTRACT OF THE THESIS OF Hardy J. Schmidbauer for the degree of Master of Science in Electrical

  • Application of WiMAX to aviation communications

    Creator:
    Kim, Sang Jun
    Abstract:
    The US military is evaluating the capabilities of emerging technologies based on IEEE 802.16 standard as a potential commercial off-the-shelf solution to support the communication requirements of the future war. In the last few years, development in military and telecommunication industries have focused on an intensive use of broadband systems,...
    Resource Type:
    Masters Thesis
    Full Text:
    This thesis was carried out in the Communication group, Department of Electrical Engineering and

  • PAPR Reduction of Optical OFDM Systems with Exponential Companding Transform and Zero Padding

    Creator:
    Chen, Deyan
    Abstract:
    Optical wireless communication (OWC) is an alternative to radio frequency (RF)communication with a signi cantly larger and unregulated spectrum. In OWC systems, optical orthogonal frequency division multiplexing (O-OFDM) with intensity modulation and direct detection (IM/DD) is commonly used. There are two common signal structures in most OWC systems based on...
    Resource Type:
    Masters Thesis
    Full Text:
    communications is growing fast. The next-generation wireless communication systems will deliver higher capacity

  • 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
    Full Text:
    reliable data communications in mobile computing environments. Motion across wireless cell boundaries

  • Hardware-Based Security Enhancement for Near Field Communication and Other Close Proximity Inductive-Based Communication Systems

    Creator:
    Kness, Philip J.
    Abstract:
    Several hardware-based security improvements to Near Field Communication (NFC) and Radio-Frequency Identification (RFID) systems are developed and presented. The improvements are intended to be used in conjunction with software encryption to ensure robust security. Two main implementations for a more secure NFC or RFID system are presented: a jamming system,...
    Resource Type:
    Masters Thesis
    Full Text:
    Communication Systems by Philip Kness A THESIS submitted to Oregon State University in partial fulfillment

  • Hierarchial digital communication processing in a multi-access tele-communication environment

    Creator:
    Fryklund, James
    Abstract:
    This paper is concerned with the application of hierarchial and parallel computing structures to digital data communications processing in a multi-access telecommunications environment. Designs are analyzed and evaluated in terms of data collected from remote access tele-communications traffic and in terms of the application to several processing problems in the...
    Resource Type:
    Masters Thesis
    Full Text:
    field of multi- access tele-communications. Hierarchial Digital Communication Processing in a Multi

  • A simple RLS-POCS solution for reduced complexity ADSL impulse shortening

    Creator:
    Helms, Sheldon J.
    Abstract:
    Recently, with the realization of the World Wide Web, the tremendous need for high-speed data communications has grown. Several access techniques have been proposed which utilize the existing copper twisted pair cabling. Of these, the xDSL family, particularly ADSL and VDSL, have shown great promise in providing broadband or near-broadband...
    Resource Type:
    Masters Thesis
    Full Text:
    in Electrical and Computer Engineering presented on September 3, 1999. Title: A Simple RLS-POCS

  • Adaptive broadband wireless interference mitigation architecture applying higher order statistics algorithm for computer platform

    Creator:
    Wang, Qiwei
    Abstract:
    The broadband wireless interference in a computer platform is resulted by multiple electro-magnetic emission sources. This non-Gaussian interference is proved to be double-sided K-distributed in previous research. With the limitation of transmission power and dimension of the device, interference mitigation is an efficient way to improve received signal bit error...
    Resource Type:
    Masters Thesis
    Full Text:
    system which is widely applied in modern mobile communication devices. Compared to the previous

  • Physical layer design of a robust low-power low-complexity optical wireless sensor system with angular diversity for metal-enclosed environments

    Creator:
    Trullinger, Von
    Abstract:
    The desire to apply short-range wireless communication systems to telemetry sensor networks in a metal-enclosed chamber has prompted this study. This thesis will discuss the design of an infrared (IR) communication system for a wireless low-power, low-data- rate sensor network in a metal enclosure. This design requires an in-depth understanding...
    Resource Type:
    Masters Thesis
    Full Text:
    wireless communication systems to telemetry sensor networks in a metal-enclosed chamber has prompted this

  • Proposed implementation of a near-far resistant multiuser detector without matrix inversion using Delta-Sigma modulation

    Creator:
    Myers, Timothy F.
    Abstract:
    A new algorithm is proposed which provides a sub-optimum near-far resistant pattern for correlation with a known signal in a spread-spectrum multiple access environment with additive white gaussian noise (AWGN). Only the patterns and respective delays of the K-1 interfering users are required. The technique does not require the inversion...
    Resource Type:
    Masters Thesis
    Full Text:
    important measures of performance in a communication channel is its bit error rate (BER). For channels that