Aditya Chopra

Voice – (512) 775 4506

Email – achopra@utexas.edu

Web – http://signal.ece.utexas.edu/~chopra

OBJECTIVE

Seeking a challenging full-time position in the design and implementation of high-speed wireless communication systems.

EDUCATION

Doctor of Philosophy, Electrical Engineering, Dec 2011 (expected)

Dissertation Title: Modeling and Mitigation of Interference in Receivers with Multiple

Co-located or Distributed Antennae

The University of Texas at Austin

Advisor: Prof. Brian L. Evans

Master of Science, Electrical Engineering, May 2008

The University of Texas at Austin

CGPA – 3.92/4.00

Advisor: Prof. Brian L. Evans

Bachelor of Technology, Electrical Engineering, May 2006

Indian Institute of Technology, Delhi

CGPA – 8.97/10 GRE – 1600/1600

Advisor: Prof. Surendra Prasad

COURSEWORK

Wireless Communications – Modulation and Multiple Access, Space Time Communications, Space Time Coding for MIMO systems, Wireless Systems Laboratory, Information Theory

Signal Processing – VLSI Communication Systems, Time Frequency Analysis, Advanced Signal Processing, Detection & Estimation Theory, Signal Theory, Digital Communications, Digital Signal Processing

Networking – Analysis and Design of Communication Networks, Advanced Wireless Networks

Computer Science – Algorithms, Engineering Programming Languages, Advanced Programming Tools

Optimization – Stochastic Optimization, Optimization in Engr. Systems

Mathematics – Probability and Stochastic Processes, Mathematical Statistics, Numerical Analysis: Linear Algebra, Linear Algebra, Real Analysis, Complex Analysis

Physics – Electromagnetic fields and waves, Modern Physics, Engineering Electromagnetics

Embedded Systems – Digital System Design Using VHDL, Embedded Systems Laboratory, Digital Signal Processing

PUBLICATIONS

Aditya Chopra and Brian L. Evans, “Joint Statistics of Interference across Distributed Antennae in a Poisson Field of Interferers”, IEEE Transactions on Wireless Communications, in preparation.

Aditya Chopra and Brian L. Evans, “Outage Performance of Diversity Combining in Interference Limited Channels”, IEEE Transactions on Wireless Communications, to be submitted Sep. 2011.

Aditya Chopra and Brian L. Evans, “Joint Statistics of Radio Frequency Interference in Multi-Antenna Receivers”, IEEE Transactions on Signal Processing, submitted Apr. 2011.

Aditya Chopra and Brian L. Evans, “Design of Sparse Filters for Channel Shortening”, Journal of Signal Processing Systems, May 2011.

Aditya Chopra and Brian L. Evans, “Design of Sparse Filters for Channel Shortening”, Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Mar. 2010, Texas, USA.

Kapil Gulati, Aditya Chopra, Brian L. Evans, and Keith R. Tinsley, “Statistical Modeling of Co-Channel Interference”, Proc. IEEE Global Communications Conference, Dec. 2009, HI, USA.

Aditya Chopra, Kapil Gulati, Brian L. Evans, Keith R. Tinsley, and C. Sreerama, “Performance Bounds of MIMO Receivers in the Presence of Radio Frequency Interference”, Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Apr. 19-24, 2009, Taipei, Taiwan.

Kapil Gulati, Aditya Chopra, Robert W. Heath Jr., Brian L. Evans, K. R. Tinsley, and X. E. Lin, “MIMO Receiver Design in the Presence of Radio Frequency Interference”, Proc. IEEE Int. Global Communications Conf., Nov. 30-Dec. 4th, 2008, New Orleans, LA USA.

Alex Olson, Aditya Chopra, Yousof Mortazavi, Ian Wong and Brian L. Evans, “Real-Time MIMO Discrete Multitone Transceiver Testbed”, Proc. Asilomar Conference on Signals, Systems and Computers, 2007. (Selected as finalist entry for best paper award contest)

Bjørn O. Hogstad, Matthias Pätzold, Aditya Chopra, Dongwoo Kim and Kwang Baek Yeom, “A Wideband MIMO Channel Simulation Model Based on the Geometrical Elliptical Scattering Model”, Proc. 15th Wireless World Research Forum, Paris, France, December 08-09 , 2005.

Bjørn O. Hogstad, Matthias Pätzold and Aditya Chopra, “A Study on the Capacity of Narrow- and Wideband MIMO Channel Models”, Proc. 15th IST Mobile & Wireless Communication Summit, Mykonos, Greece, June 2006.

TECHNICAL REPORTS

Yousof Mortazavi, Aditya Chopra and Brian L. Evans, “LabVIEW Multicore Real-Time Multi-Input Muli-Output Discrete Multitone Transceiver Testbed”, National Instruments Week, August 4-7, 2008, Austin, Texas USA.

Alex Olson, Aditya Chopra, Yousof Mortazavi and Brian L. Evans, “2x2 MIMO DMT Testbed”, National Instruments Week, August 7-9, 2007, Austin, Texas USA.(Second place - 2007 NI Week Virtual Instrumentation Applications Paper Finalist, Prototyping and Testing Category)

RESEARCH EXPERIENCE

Radio Frequency Interference Modeling and Mitigation

Developed statistical models of platform noise, co-channel interference and adjacent channel interference for single and multi-antenna systems. Studied communication performance of multi-antenna receivers in the presence of impulsive interference. Designed receiver algorithms to mitigate impact of impulsive interference on communication performance.

Radio Frequency Interference Modeling and Mitigation Toolbox in MATLAB provides a simulation environment for generating RFI and quantifying the performance of algorithms for parameter estimation and interference mitigation. Release includes 51 files with 9,632 lines of MATLAB code.

More details - http://users.ece.utexas.edu/~bevans/projects/rfi/index.html

Modeling and Mitigation of Synchronous Spurs

Modeled additive and mixing spurs in test and measurement equipment, and designed fixed- and floating-point algorithms to mitigate the impact of synchronous spurs on measurement and communication test performance.

Multi-channel Discrete Multi-Tone Testbed

Designed and developed a bi-directional high speed multi-channel multi-carrier testbed using National Instruments’ PXI hardware and LabVIEW Real-Time software. Studied communication performance vs. implementation complexity trade-offs and designed novel channel shortening equalizers using sparse filters.

More details - http://users.ece.utexas.edu/~bevans/projects/adsl/index.html

Channel Estimation in MIMO-OFDM

Developed novel channel estimation techniques for OFDM systems in my senior design project. Awarded the Rajiv Bambawale award for the best senior design project in Electrical Engineering.

Statistical-geometric modeling of MIMO channels

Studied statistical circular and elliptical channel models in different scattering environments.

Speech coding

Implemented the ITU-T standard G.729AB and G.723 speech–coding algorithm on a TI C6211 and C6711 DSP. (Awarded the Summer Undergraduate Research Award 2004)

Reviewer for IEEE conferences and journals

· IEEE International Global Communications Conference

· IEEE International Conference on Communications

· Asilomar Conference on Signals, Systems and Computers

· IEEE International Conference on Acoustics, Speech, and Signal Processing

· IEEE Transactions on Communications

· IEEE Transactions on Signal Processing

· IEEE Transactions on Aerospace and Electronic Systems

· IEEE Transactions on Circuits and Systems

· IEEE Transactions on Mobile Computing

· European Transactions on Telecommunication

INDUSTRY EXPERIENCE

Summer Internship – National Instruments (R&D – Advanced Communications Research) - 2010

Implemented a LTE-based OFDM communication system on National Instruments’ test/measurement hardware.

Summer Internship – National Instruments (R&D – RF Modular Instruments) - 2010

Designed and implemented signal-processing algorithms to suppress low-level synchronous noise (spurs) in RF test and measurement equipment.

Summer Internship – Qualcomm Inc. (Corporate R&D - Systems) - 2009

Designed advanced CDMA receiver algorithms such as linear and decision feedback based interference cancellation for enhanced HSPA uplink.

Summer Internship – Qualcomm Inc. (Corporate R&D - Systems) - 2008

Designed and implemented algorithms to perform efficient resource allocation in macro- and pico- cell based wireless network environments.

Summer Internship – Qualcomm Inc. (Corporate R&D - Systems) - 2007

Designed and implemented interference cancellation algorithms for wireless receivers based on broadcast OFDM technology (MediaFLO).

AWARDS

Finalist - Best Student Paper Contest at the Asilomar Conference on Signals, Systems and Computers, 2007 for “Real-Time MIMO Discrete Multitone Transceiver Testbed”.

Finalist - Prototype/Test category at the National Instruments’ NIWeek Virtual Instrumentation Applications Paper Contest Awards 2007 for a paper titled “2x2 MIMO DMT Testbed”.

Rajiv Bambawale Award for Best Senior Design Project in Electrical Engineering for “Design and Simulation of Channel Estimation Techniques for MIMO – OFDM systems”.

Certificate of Merit in the Indian National Mathematical Olympiad (2001) and invitation to the International Mathematics Olympiad Training Camp. (www.nbhm.dae.gov.in/olympiad.html)

TECHNICAL SKILLS

Test and measurement: Signal generators, oscilloscopes, spectrum analyzers, LabVIEW

Analog circuit simulation: Spice

Hardware description languages: Verilog, VHDL

Assembly languages: TI TMS320C5000 DSP, TI TMS320C6000 VLIW DSP

High-level languages: C, C++, Java

Integrated development environments: Code Composer Studio, Visual Studio, IntelliJ, Eclipse

Software development: Perforce, Subversion, Sourcesafe

Scripting languages: csh, ksh, sed, sh, awk, Perl

Algorithm development environments: MATLAB, LabVIEW, Android

Electronic design automation tools: LabVIEW RT, SIMULINK

Optimization software: GAMS