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Engineer Electrical

Sachse, Texas, 75048, United States
August 18, 2018

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Endalkilign (Endalk) Teferi Derseh

**** ********* ** ******, ** 75048



Highly organized and motivated Electrical Engineer; capable to work independently or cooperatively as part of a team to accomplish goals

Over SIX years of work experience in UMTS, WCDMA, GSM, HSPA, VoLTE, LTE Wireless Network Testing, prelaunch and Deployment.

TWO years of work experience as a field engineer

Experience on ACTIX Spotlight/Analyzer, NEMO, TEMS, Agilent, MapInfo, MS Street & trips, Nortel OSS, Spectrum Analyzer tools for Pre-Optimizing and analyzing Drop call reasons, RSSI issue, Signal generators, and Handover issue.

Effective communicator with excellent management skills and strong personal initiative OBJECTIVE

To obtain a long-term career with an organization, this has a strong background that provides good opportunities for enhancement of professional and personal status. Also, I am willing to work as a key player in challenging and creative environment. WORK EXPERIENCE

RF Engineer: For AT&T under Tech Mahindra agent in Plano TX April 2014 - present Responsibilities

LTE/UMTS Services testing using Apple, Android and air-card based devices

Travelling to different cities in US to specific cell sites and performing relevant regression testing during Maintenance Windows

Perform regression testing with different APNs on different network zones

Execution & Modification of test plans/reports for various test scenarios.

Provide Troubleshooting-testing support based on need during the day and night

VoLTE testing in VoLTE RAN areas

Work with VoLTE Night of Lunch team (NOL) to lunch VoLTE call

Performing functional, KPI and feature testing for VoLTE

IP tracing in a complex network & multi-protocol analysis

Ensuring VOLTE & LTE call flows compliant with 3GPP specifications

Documenting clearly & accurately and escalating the discrepancies, anomalies or issues with the test case

Testing & analyzing telephony voice services such as call waiting, call barring, 3-way calling, etc

Testing & analyzing proper operation with landline (PSTN) & (Mobile networks) PLMN

Testing & analyzing the voice quality of the voice services such as CDMA, VOLTE, etc

Testing & analyzing proper operation with various 3G and 2.5G networks

Performing functional, KPI and feature testing for VoLTE.

Work with service validation team to validate the service

Give training when new coworker join the team

Get trained for automation test

Work with Neo Enterprise team to upgrade the network Associate RF Engineer: For Ericsson under Glow Networks Agent in Richardson TX Aug 2013 – April 2014 Responsibilities

Accompanied Drive Test Data analysis considering Coverage, Handover, Call Drop, Rx Quality

Field Test analysis using TEMS Investigation 13.1.33

Checked upload and download throughputs speed through Putty and front command speed test

Performed Network improvement by fixing Call Drop, Rx Quality and performance

Worked on optimizing the performance of a system using various RF test techniques in the field of LTE, CDMA, UMTS and GSM and performed drive tests in different transmission sites that provide LTE service

Various parameters like SC (scrambling code), SNR and RSCP are measured using TEMS software tool to decide the quality of a network service

Performed various tests in LTE sites to analyze downlink/uplink throughput speed and CW/CCW handover RF Performance Engineer: For Alcatel Lucent (ALU) under Verveba Telecom Agent in Kansas City Feb 2013 – Aug 2013 Responsibilities

Operated both CW test equipment and JDSU in-building walk test kit to collect the data at the venues

During collecting the data monitor the signal strength, check the coverage inside the building, check the call drops, and send the report with the collected data as requested to send the report

Performed surveys on DNA (Deployment Network Assessment) Services for the Metro Cell (AT&T) projects.

Identify critical/major problems, troubleshooting issues across the market and involve multi-venders investigation.

Analyzing Drive Test data using Actix Analyzer and Spotlight, TEMS, and Agilent.

Using spectrum analyzer detect hardware and software problems.

By using signal generator check the quality and strength of the signal

Working with design team and identify location specific needs for new cells taking baseline, performance, capacity, and population into consideration and evaluating coverage problems and requirements for coverage cells using design tools (ATOLL)

Working with the performance team to understand area and issues within his/her sector; and working with System Performance counterpart to understand issues and help reduce Lost Calls and Ineffective Attempts within their sector

Check RSSI issues; walk testing on Reserved/Non reserved sites with different Band (850/1900) and resolve external interference issues, checking the state of interference affected sites (RBS 3200/RBS 2200) and checking accessibility and retainability of the site

Preparing FCC submissions for interference location confirmation.

Data Digital Communications including: DS1, DS3, Fiber, ISDN

Coordinate with RF performance Engineer, Technicians, Different Carriers on the field and test RBS come up with resolution with deadlines and find Interference issues like TV Cable leak, malfunctions Antennas, malfunctions Infrared systems which interfere in our BTS sectors that causing Drop call, Block calls

RF survey and design for ALU femto/metro cell solution, the system is designed to support all 3G-call traffic inside the building and optimized to minimize handoff/interference with the existing macro network

Ability to perform pre-commission, Commissioning, Integration, Maintenance and Upgrades to LTE cell site equipment

Prepare drive route by using MapInfo for cluster drive testing

Configure and integrate GSM(2G), UMTS(3G) and LTE on client network infrastructure

Troubleshoots network and transport issues and IP configuration issues

Performed drives to determine site’s coverage and for troubleshooting Associate RF Engineer: For Alcatel Lucent (ALU) under Verveba Telecom Agent Richardson TX Dec 2011 – Feb 2013 Responsibilities

Collecting data of GSM, UMTS, and LTE network with the help of UE’s, NEMO software, GPS, antennas, and scanner from the desired clusters

Identifying problems such as dropped calls, blocked calls, handover

Identifying areas of each sectors of coverage, interference, evaluation of network changes, and various other parameters

Testing the speed of uploading, downloading, and pinging ground trip time of long-term evolution (LTE) network.

Performed stationary tests with different loads on the network to check for the optimum throughput in downlink and uplink

Configuration of NEMO ports, workspace and command sequences EDUCATION

University of Texas at Dallas (UTD) Graduated Dec 2012 B.S. Electrical Engineering, GPA 3.1/4.0

Relevant Courses: RF Circuits, Electromagnetic engineering, Electronic Devices, Wireless Network, Telecommunication networks, Electrical Network Analysis, Digital Circuits, System and Controls, Electronic Circuits, and Computer Networks

Richland College, Dallas Texas Graduated Dec 2012 Associate Degree in Science, GPA 3.4/4.0

Computer Skills and tools

Operating Systems: Windows 7/ 8/ 8.1 /10 /Vista/NT/XP/00/98, MS-DOS, Linux, Mac OSX

Languages: C, C++, java, Verilog, Assembly Language, NI Lab VIEW, Oracle SQL developer

Radio Network Planning & Design Tools: Atoll, MapInfo, MS Excel, MS Outlook, MS Access, Google Earth, eDat, Actix, TEMS, NEMO...etc.

Strong troubleshooting skills


Designed, assembled, and tested linear electrical networks and systems utilizing breadboards, Keithley 2430 (smu’s), AgilentMSO6000 oscilloscopes, Agilent 33220A Function Generators, CAD tool PSpice, and standard electronic components.

Designed, assembled, and tested combinational and sequential logic circuits exploiting sample computer-aided design (CAD) tools and implemented using (FPGA’s).

Design, assembly and testing of electronic circuits that use diodes, transistors and operational amplifiers in configurations typically encountered in practical applications

Involved in a senior design team project (Quad-rotor): designing a Communication System using low pass filters and Analysis of Digital and Analog Signals.


Introduction to planning and optimization

LTE Network Features

UMTS Network Features

Design Tools (Atoll)

Post optimization Tools (Actix)


REFERENCES: References available upon request

Citizenship: U. S Citizen

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