Now showing items 1-20 of 21

    • Achieving near-optimal MIMO capacity in a rank-deficient LOS environment 

      Walkenhorst, Brett T. (Georgia Institute of Technology, 2009-06-29)
      In the field of wireless multiple-input multiple-output (MIMO) communications, remarkable capacity enhancements may be achieved in certain environments relative to single-antenna systems. In a non-line of sight (NLOS) ...
    • Channel State Information in Multiple Antenna Systems 

      Yang, Jingnong (Georgia Institute of Technology, 2006-08-22)
      In a MIMO system, a transmitter with perfect knowledge of the underlying channel state information (CSI) can achieve a higher channel capacity compared to transmission without CSI. When reciprocity of the wireless channel ...
    • Communication Strategies for Single-User and Multiuser Slow Fading Channels 

      Kannan, Arumugam (Georgia Institute of Technology, 2007-08-27)
      Technological progress in the field of wireless communications over the past few years has only been matched by the increasing demand for sophisticated services at lower costs. A significant breakthrough was achieved in ...
    • Cordic-based Givens QR decomposition for MIMO detectors 

      Ren, Minzhen (Georgia Institute of Technology, 2013-10-14)
      The object of the thesis research is to realize a complex-valued QR decomposition (QRD) algorithm on FPGAs for MIMO communication systems. The challenge is to implement a QRD processor that efficiently utilizes hardware ...
    • The Design of Linear Space-Time Codes for Quasi-static Flat-fading Channels 

      Varadarajan, Badri (Georgia Institute of Technology, 2004-07-09)
      The reliability and data rate of wireless communication have traditionally been limited by the presence of multipath fading in wireless channels. However, dramatic performance improvements can be obtained by the use of ...
    • Electronic Equalization of High-Speed Multi-mode Fiber Links 

      Balemarthy, Kasyapa (Georgia Institute of Technology, 2007-07-09)
      The objective of this research is to investigate low-complexity, efficient electronic equalizers to increase the data rate and possibly extend the reach of multi-mode fiber (MMF) links. Specifically, we begin by baselining ...
    • Indoor MIMO Channels with Polarization Diversity: Measurements and Performance Analysis 

      Anreddy, Vikram R. (Georgia Institute of Technology, 2006-04-12)
      This thesis deals with dual-polarized multiple input multiple output (MIMO) channels, an important issue for the practical deployment of multiple antenna systems. The MIMO architecture has the potential to dramatically ...
    • Integrating dependencies into the technology portfolio: a feed-forward case study for near-earth asteroids 

      Taylor, Christianna Elizabeth (Georgia Institute of Technology, 2011-11-15)
      Technology Portfolios are essential to the evolution of large complex systems. In an effort to harness the power of new technologies, technology portfolios are used to predict the value of integrating them into the project. ...
    • Interference management in MIMO networks 

      Gaur, Sudhanshu (Georgia Institute of Technology, 2008-05-19)
      Several efficient low complexity interference management techniques were developed for improving the performance of multiple-input multiple-output (MIMO) networks. Sub-optimal techniques involving optimal antenna selection-aided ...
    • Interference Mitigation in Wireless Communications 

      Kim, Kihong (Georgia Institute of Technology, 2005-08-24)
      The primary objective of this thesis is to design advanced interference resilient schemes for asynchronous slow frequency hopping wireless personal area networks (FH-WPAN) and time division multiple access (TDMA) cellular ...
    • Iterative Techniques Based on Energy Spreading Transform for Wireless Communications 

      Hwang, Taewon (Georgia Institute of Technology, 2005-11-10)
      The objective of the proposed research is to devise high-performance and low-complexity signal-detection algorithms for communication systems over fading channels. They include channel equalization to combat intersymbol ...
    • Lattice reduction for MIMO detection: from theoretical analysis to hardware realization 

      Gestner, Brian Joseph (Georgia Institute of Technology, 2011-04-04)
      The objective of the dissertation research is to understand the complex interaction between the algorithm and hardware aspects of symbol detection that is enhanced by lattice reduction (LR) preprocessing for wireless ...
    • Layered Space-Time Structure for MIMO-OFDM Systems 

      Du, Jianxuan (Georgia Institute of Technology, 2005-07-19)
      The low complexity of layered processing makes the layered structure a promising candidate for MIMO systems with a large number of transmit antennas and higher order modulation. For broadband systems, orthogonal frequency ...
    • Low-complexity and power-efficient wireless cooperative relay networks with enhanced reliability 

      Choi, Gi Wan (Georgia Institute of Technology, 2013-01-09)
      In recent years, global mobile data traffic has been increasing exponentially as mobile devices pervade our daily lives. To cope with the ever growing demands for higher data rates and seamless connectivity, one solution ...
    • Measurement, Modeling, and Performance, of Indoor MIMO Channels 

      Jiang, Jeng-Shiann (Georgia Institute of Technology, 2004-07-09)
      The objective of this dissertation is to investigate the performance of the recently proposed MIMO technology in real indoor environments based on channel measurements centered at 5.8 GHz. First, a MIMO channel measurement ...
    • MIMO Selection and Modeling Evaluations for Indoor Wireless Environments 

      Dong, Lu (Georgia Institute of Technology, 2007-11-12)
      Array-to-array, or multiple-input multiple-output (MIMO), links are known to provide extremely high spectral efficiencies in rich multipath environments, such as indoor wireless environments. The selection of a subset of ...
    • Multi-antenna physical layer models for wireless network design 

      Shekhar, Hemabh (Georgia Institute of Technology, 2008-01-15)
      In this thesis, CMs of linear and non-linear multiple antenna receivers, in particular linear minimum mean squared error (LMMSE) and LMMSE with decision feedback (LMMSE-DF), are developed. To develop these CMs, first a ...
    • Multiple antenna systems in a mobile-to-mobile environment 

      Kang, Heewon (Georgia Institute of Technology, 2006-11-20)
      The objective of this dissertation is to design new architectures for multiple antenna wireless communication systems operating in a mobile-to-mobile environment and to develop a theoretical framework according to which ...
    • Network Protocols for Ad-Hoc Networks with Smart Antennas 

      Sundaresan, Karthikeyan (Georgia Institute of Technology, 2006-07-31)
      Multi-hop wireless networks or ad-hoc networks face several limiting characteristics that make it difficult to support a multitude of applications. It is in this context that we find smart antennas to find significant ...
    • Signal Acquisition and Tracking for Fixed Wireless Access Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing 

      Mody, Apurva Narendra (Georgia Institute of Technology, 2004-11-23)
      The general objective of this proposed research is to design and develop signal acquisition and tracking algorithms for multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) systems for fixed ...