Software Engineer System

Nadhiya Murthi ******.*******@*****.***

***, * *** **, *** #230 408-***-****

Arlington, Texas-76010

CAREER OBJECTIVE: Seeking a challenging job in the field of wireless communication and Embedded System Design.

EDUCATION:

Master of Science in Electrical Engineering, University of Texas, Arlington,2009-Present (Expected graduation Spring,2011)

Bachelors in Engineering in Electronics and Communication Engineering, Madras Institute of Technology, Anna University, India 2004- 2008

TECHNICAL SKILLS:

• Languages:

C/C++, C#, Microsoft .NET

Matlab, Tcl, OFB, Scheme

• Software Tools:

Matlab – 4 years experience in modeling communication systems & filters.

Mplab IDE – 1 year experience in PIC Microcontroller programming.

Network Simulator ns2– 6 month experience in developing backbone network.

Visual Studio, NI Test Stand, Test Manager and Air Access, Perforce, wireshark.

• Hardware Used:

Microcontrollers and Circuit board - 1 year experience

nRF24L01, RS-485 and RS-232 Transceivers – 1 year experience

Wireless Network Emulator and Channel Emulator.

WORK EXPERIENCE:

Spirent Communication, Fort Worth Texas-USA Wireless Intern, Jun 2010 –Aug 2010

As an Intern, I have analyzed and developed API for testing the UMTS system. The existing method of testing the UMTS system from GUI window is replaced with API which invokes the Microsoft .NET Methods, NI Test Stand along with Air access interface. The UMTS features are then tested with API.

Tata Consultancy Services, INDIA Software Engineer, 2008 - 2009

I have worked as a Software Engineer at Tata Consultancy Services in the Banking and Finance business unit. Primary responsibilities included software quality testing of critical Citibank Financial group software systems and development of user interface enhancements. Software testing was done using automated test tools and user interface enhancements were implemented in 'C' language. Basic training is given in scheme and .Net platform.

GRADUATE PROJECTS:

Design of IPTV Network:

Designed an IPTV backbone Network between end user using UDP transport layer protocol. Both Unicast and Multicast Network are designed using Bellman Ford algorithm and PIM-DM algorithm respectively. The bandwidth utilization and packet flow is analyzed using NS-2 network simulator.

Design of MIMO system using STBC:

Designed and Analyzed of 4x4 MIMO system in Physical layer using Space Time Block Coding. The information bits are BPSK modulated, block coded, up sampled and reshaped using Raised cosine filter. The Symbol is transmitted over Rayleigh channel designed using Jakes Model added with AWGN noise. At the Receiver, Equal gain combiner is used to recover the payload. The BER is compared between 4x4 and 4x1 MIMO system.

RF wireless control In Robotics:

Designed a wireless communication link to the Robot using nRF24L01 Transceiver. The wireless channel efficiency is calculated by sending sample data packets in the entire channel. With the number of packet loss in the channels, the efficiency is calculated.

MIMO System Simulation:

Designed and analyzed spatial Multiplexing in 2x2 MIMO system. The signal is transmitted over the Rayleigh channel having correlation characteristics. The correlation between the elements depends on the polarization. Improved SER is obtained at the receiver by the use of Polarization diversity. Space- time Transmit Diversity (STTD) is also simulated with MRRC and Maximal Likelihood detector at the receiver to give better SER.

Real Time Operating System:

Designed and implemented Real Time Operating System with PIC24 microcontroller board. The RTOS implemented is concerned with cooperative and preemptive mode with the support of semaphores, yield and timer. The resource is utilized effectively by the use of stack operation to save the content of one task and with the help of timer.

Bidirectional Communication System using RS-485:

Designed and implemented RS-485-based bidirectional communication system between two microcontroller-based boards with PIC24 microcontrollers. The project involves two subsystems - 1) RS-232 Serial communication between the PC and one board (controller node) for providing user commands and 2) RS-485 bi-directional communication between the two boards. Communication between the boards was verified for different user commands.

Anti-Noise Filter design using MATLAB:

Designed and Evaluated IIR (Butterworth, Chebychev1, Chebychev2, and Elliptic) and FIR (Kaiser and Parks-McClellan) filters in enhancing speech signals. Low pass cascade filter specification was used to improve the stability of the system. For each type of filter, filter characteristics such as the order of the filter, magnitude response, pole–zero placement and impulse response were analyzed carefully. Optimized the filter coefficients for better performance.

UNDERGRADUATE PROJECT:

Simulation of channel impairment over optical fiber:

The CDMA system is analyzed and designed. The user data is transmitted in wireless channel to BS and to the MSC in Single mode fiber. Adaptive filter is designed at the BS to overcome the effect of fading. Effects of various channel on the signal transmitted to BS and MSC are analyzed and simulated.

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