Dissertation
Dissertation:
Characterization of a UWB channel in the data center
environment. Dr. Viswanathan, SIU , Dr. Kant, Intel Corp, April
06 – present Data centers are
emerging as important parts of large organizations. Power
consumption, energy dissipation and location of servers in the
cluttered environment are some of the challenging issues to be
resolved. To estimate the location of servers, Ultra
Wideband (UWB) technology seems to be a promising solution
due to large bandwidth and high resolution. The use of UWB
implies characterization of a channel is vital for design
and performance evaluation of UWB systems. I completed
measurements in the in the Intel data center at Santa Clara.
Completed
literature survey for indoor channel model. Completed the
channel measurements using network analyzer. Analyzed power
delay profile, delay spread , ray arrival time and cluster
arrival time. Ranging and
position estimation in progress. -
Technical Contributor to the architecture including the MAC (Layer 2) for localization in the data center.
-
Proof-of concept in progress.
Internship Experience
Network Software Intern , Intel Corporation,
Santa Clara, CA, June 06 – Dec 06 I was working in the Wireless Network Labs of Corporate Technology Group. We were working on Mobile Multi-Hop Relay (MMR) project. Our responsibility was to drive IEEE 802.16j (WiMax) standard and develop MMR
simulator. Completed Opnet and C++ linkage to import external
C++ files in OPNET. Contributed to the design of MMR
simulator framework (802.16e). Completed compiling the OFDMA PHY simulator
on UNIX platform. Completed scripts for OFDMA PHY simulator using
Mat lab and Shell scripting. Responsible for writing PHY contribution for
IEEE 802.16j. Completed Mac PDU processing for the WiMax
Simulator.
Validation Intern, Agere Systems, Allentown, PA, May 05 – Aug 05 Project Goal: To build automated validation
environment to reduce the test time and improve equipment
utilization efficiency. Handled the project independently from start to
finish. Successfully created modular/reusable package for
validation environment. Created automated environment using remote access
over Ethernet. The remote access was used in heterogeneous
environment, Windows-Linux communication. Responsible for integrating the project into the
existing environment.
Systems Intern, Agere Systems Allentown, PA, May 04 – Aug 04 Summer intern in storage division with read
channel group. I was working on the servo side of the
architecture. Developed the global version of the code in C
and updated in Control Version Software. Analyzed the performance of servo in terms of
packet error rate. Simulated the results for Lorentizian pulse. Completed Shell scripts to analyze the
results.
List of Papers
N.Udar, K.Kant, R. Viswanathan, “Asset Tracking Solution for a Large Data Center using UWB – WUSB Radios”,
future publication. N.Udar, K.Kant, R. Viswanathan, “Pros and Cons of Various Indoor Localization Systems”, to be submitted to
Networking Journal. N.Udar, K.Kant, R. Viswanathan, “Localization of Servers in a Data Center Using Maximum Likelihood Identification”, submitted to
IEEE Infocom 2008. N.Udar, K.Kant, R. Viswanathan, D. Cheung, “Ultra Wideband Channel Characterization and Ranging in Data Centers”, to appear in
IEEE International Conference on Ultra-Wideband , Sept. 2007 , Madarin, Singapore pp. xx – xx. N.Udar, K.Kant, R. Viswanathan, D. Cheung , “Characterization of Ultra Wideband Channel in Data Centers”,
IFIP Networking Conference, May 2007 , Atlanta, GA pp. 1187-1189. H. Ray, N. Udar, R. Viswanathan, “A Weighted Sum Of Gaussian-Derived Pulse Design For UWB”,
IEEE Radio and Wireless Symposium, Jan. 2006, San Diego, CA, pp. 383-386. Enchakilodil, S.M.; Udar, N.; Viswanathan, R, “A Simple Algorithm that Adapts one of Two Packet Sizes in a Wireless ARQ Protocol” ,
Information Sciences and Systems, March 2006 pp. 140–144. N. Udar , A. Mahajan , R. Viswanathan , “Signal Parameter Estimation of Single Bit Quantized Sensors”,
ASME 2004 , San Diego, CA.
Awards/Invited Talks
N.Udar, “Growing need for data centers”, Invited Talk Feb.2007, Antenna Lab, SIU, Carbondale, IL. N. Udar ,”US Work Culture”, Panelist, Workshop for International Students, March 2007, SIU, Carbondale, IL. Received the Rising Star Award during summer 2005 Internship at Agere Systems, Allentown, PA.
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