Now showing items 1-23 of 23

  • 802.11b Operating in a Mobile Channel: Performance and Challenges 

    Steger, Christopher; Radosavljevic, Predrag; Frantz, Patrick (2003-09-20)
    In the past, the worlds of wireless voice and data transmission have been largely disjoint. Voice traffic has been carried over circuit-switched cellular links, and data has been largely restricted to packet-switched ...
  • Benefits of DSP Extra-curricular Activities: A Look at the Texas Instruments DSP and Analog Challenge 

    Robinson, Torrence; Peleg, Nimrod; Rhodes, Jacob; Frantz, Patrick (2002-05-20)
    This paper describes the benefits associated with student and faculty participation in DSP design-related activities that fall outside of the usual university course requirements. It will also describe industry's role in ...
  • Design of the Transit Access Point Hardware Platform 

    Murphy, Patrick; Frantz, Patrick; Aazhang, Behnaam (2005-09-01)
    Our objective is to design, analyze, prototype and experimentally study the theoretical underpinnings for a wireless internet that simultaneously achieves deployability, scalability, high performance and a cost-effective ...
  • Development of Digital Signal Processor controlled Quantum Cascade Laser based Trace Gas Sensor Technology 

    So, Stephen; Wysocki, Gerard; Frantz, Patrick; Tittel, Frank K. (2006-08-01)
    This work reports the design and integration of a custom digital signal processor (DSP) system into a pulsed quantum cascade laser (QCL) based trace gas sensor to improve its portability, robustness and operating performance. ...
  • Development of Japanese-language DSP Education Content in the Connexions Project 

    Frantz, Patrick; Yamada, Yoji (2005-10-01)
    Due to factors such as a small and fragmented market and rapid hardware development, the conventional textbook is inadequate for DSP lab education. Freely available open-content materials that enable and promote local ...
  • DSP Education At Rice University 

    Frantz, Patrick; Choi, Hyeokho; Baraniuk, Richard G. (2003-09-01)
    Rice University has a decades-long tradition of both digital signal processing (DSP) research and education, beginning in 1968. Since that time, Rice University has become a world leader and continued to be a pioneer in ...
  • A DSP-Based Platform for Wireless Video Compression 

    Murphy, Patrick; Bharadwaj, Vinay; Welsh, Erik; Frantz, Patrick (2002-11-01)
    With the exponential growth of wireless voice markets, demand for wireless video services is soon to follow. However, bandwidth limited wireless channels coupled with mobility issues pose a great challenge in the hardware, ...
  • A Fast Algorithm and Testbed Evaluation for Sound Source Localization Using Sensor Networks 

    Johnston, Brian; Yin, Xiaoming; Valenzuela, Adrian; Frantz, Patrick (2005-09-01)
    The theoretical idea of a network composed of small, low-cost sensor nodes able to localize the source of acoustic events has the potential to make a multitude of exciting applications possible. However, this potential can ...
  • An FPGA Based Rapid Prototyping Platform for MIMO Systems 

    Murphy, Patrick; Lou, Feifei; Sabharwal, Ashutosh; Frantz, Patrick (2003-11-20)
    There exists a seemingly limitless demand for wireless communications systems capable of higher datarates with lower power consumption. While the demand for improvement in these systems seems limitless, the spectrum ...
  • An FPGA Implementation Of Alamouti's Transmit Diversity Technique 

    Murphy, Patrick; Frantz, Patrick; Dick, Chris (2003-10-01)
    This paper presents the FPGA implementation of a multiple antenna wireless communications system based on Alamouti's transmit diversity scheme. Alamouti's transmit diversty scheme is a space-time block code with support ...
  • An FPGA-based Daughtercard for TIs C6000 family of DSKs 

    Gadhiok, Manik; Hardy, Ricky; Murphy, Patrick; Frantz, Patrick; Choi, Hyeokho; Cavallaro, Joseph R. (2005-06-01)
    In this paper we present an FPGA-based daughtercard designed for TIs C6000 family of DSP Starter Kits (DSKs). The hardware, initially designed for a course project, provides a platform for studying heterogeneous systems ...
  • A FPGA­Based Experimental PHY for 802.11b WLAN 

    Lou, Feifei; Murphy, Patrick; Frantz, Patrick (2003-10-20)
    The swift proliferation of wireless data communication systems, and the ever-increasing demand for faster data rates requires that engineers be able to quickly design, implement and test new wireless algorithms for data ...
  • GNOMES: A Testbed for Low-Power Heterogeneous Wireless Sensor Networks 

    Welsh, Erik; Fish, Walt; Frantz, Patrick (2003-05-20)
    Continuing trends in sensor, semiconductor and communication systems technology (smaller, faster, cheaper) make feasible very dense networks of fixed and mobile wireless devices for use in many different sensing and ...
  • A Hardware Testbed for the Implementation and Evaluation of MIMO Algorithms 

    Murphy, Patrick; Lou, Feifei; Frantz, Patrick (2003-10-20)
    As the demand for higher performance wireless communications continues to grow, novel algorithms have been developed which provide increased performance and efficiency. One such class of algorithms involves the use of ...
  • Improving Connection Times for Bluetooth Devices in Mobile Environments 

    Welsh, Erik; Murphy, Patrick; Frantz, Patrick (2002-03-20)
    Communications devices in a highly mobile environment need to minimize connection setup times in order to maximize useful data transfer. In this paper we investigate - empirically and through simulations - the device ...
  • A Mobile Testbed for GPS-Based ITS/IVC and Ad Hoc Routing Experimentation 

    Welsh, Erik; Murphy, Patrick; Frantz, Patrick (2002-10-01)
    Past investigations into the formation of ad hoc networks and ad hoc routing have focused on computer simulations of mobile traffic. However, the proliferation of mobile electronic devices (mobile phones, PDAs, and laptop ...
  • Multilingual Open-Content Signal Processing Laboratories in Connexions 

    Frantz, Patrick; Baraniuk, Richard G.; Choi, Hyeokho; Jones, Douglas L. (2004-11-01)
    Due to inherent factors like a small and fragmented market and rapid hardware obsolescence, the conventional textbook is inadequate for DSP laboratory education. Freely available open-content materials that enable and ...
  • Performance of IEEE 802.11b Wireless LAN in an Emulated Mobile Channel 

    Steger, Christopher; Radosavljevic, Predrag; Frantz, Patrick (2003-04-20)
    The performance of 802.11b wireless LANs is well understood for indoor environments. However, their behavior in outdoor and mobile environments has remained largely unexplored. We have performed experiments to bridge this ...
  • A Prototype Platform for a Multitier Network Interface Card (mNIC) 

    Frantz, Patrick (2002-09-20)
    The Center for Multimedia Communication at Rice University has developed a hardware testbed for multitier wireless environments. These types of environments incorporate many diverse wireless standards, such as 802.11 and ...
  • Quantum Cascade Laser Spectrometer for Trace-Gas Detection of Exhaled Carbonyl Sulfide 

    Wysocki, Gerard; So, Stephen; McCurdy, Matthew; Roller, Chad; Weidman, Daniel; Frantz, Patrick; Curl, Robert; Tittel, Frank K. (2004-05-01)
    Simultaneous concentration measurements of echaled carbonyl sulfide and carbon dioxide were demonstrated using a pulsed quantum cascade laser based gas sensor. This sensor has potential applications in biomedical diagnostics ...
  • Using Bluetooth for Short-Term Ad-Hoc Connections Between Moving Vehicles: A Feasibility Study 

    Murphy, Patrick; Welsh, Erik; Frantz, Patrick (2002-05-01)
    Bluetoothâ ¢ is a promising wireless technology designed for short-range ad-hoc connections, and it has many potentially useful applications. One such use is the transfer of data between two fast-moving vehicles such as ...
  • VALID: Custom ASIC Verification and FPGA Education Platform 

    Murphy, Patrick; Welsh, Erik; Frantz, Patrick; Hardy, Ricky; Mohsenin, Tinoosh; Cavallaro, Joseph R. (2003-06-01)
    This paper describes VALID, a platform for testing student designed ASICs and for teaching the basics of FPGA design. VALID is designed to maximize ease of use from a student?s perspective while maintaining enough flexibility ...
  • White Paper on IEEE 802.11b Mobile Channel Modeling 

    Steger, Christopher; Radosavljevic, Predrag; Frantz, Patrick (2002-04-20)
    Researchers from Rice Universityâ s Center for Multimedia Communications (CMC) recently conducted experiments with the goal of understanding and quantifying the effects of various channel effects on an 802.11b link. In ...