Summary
Overview
Work History
Education
Skills
Certification
Training
LAB EXPERIENCE
Timeline
Generic

Endalkilign Teferi Derseh

Rowlett

Summary

Completed Dish wireless 5G NR nominal design for all Texas market, but Dallas

Overview

13
13
years of professional experience
1
1
Certification

Work History

Senior RF Wireless Design and Planning Engineer

DISH Wireless NETWORK
08.2019 - Current
  • Perform model tuning for different market for different frequency band (low and mid band)
  • Perform nominal design for different market with different frequency (low and mid)band
  • Run Automatic Cell Planning (ACP) on Area of Interest (AOI)
  • Run automatic cell planning for CBRS
  • Run prediction for analyzing RSRP coverages, PDSCH Avg Throughput, Maximum Achievable Spectral Efficiency, SINR
  • Create traffic map using crowd source data, social media
  • Review pre-qual sites for network designing and select optimal center line(CL) for the design, and cover significant subscriber
  • Design to cover at least75 percent of population on Area of interest with mid-band and75 percent of coverage on major PEA inside the AOI
  • Perform5G NR design for different market with different frequency (low and mid) band and cover at least75 percent of population on Area of interest (AOI) with mid-band and75 percent of coverage on major partial economic areas (PEA)
  • Completed ahead of schedule many major markets designs (Houston TX, Austin/San Antonio TX, East TX, Waco TX, South TX, West TX, and Hawaii Markets) and re-designs (most of which included multiple versions as priorities and directions changed)
  • I was integral part of the RF Design team that completed all market designs and many more re-designs and delivered designs for more than25.5k sites to Deployment teams ahead of schedule
  • More importantly all of these designs were done in-house which saved Dish Wireless millions of dollars
  • I was continuing to meet internal customer needs in a timely manner – example was my on-going support of local RF and Deployment teams in Texas and Hawaii markets
  • Helping market team with RF design and RF Design tools (Planet) related questions
  • Validate planet software testing for new version before releasing the new version to the production
  • Performing RF Design per PEA (Partial economic area) for national label
  • Perform validation test for RF Design tools for new versions (planet)

RF Engineering – RF OPTIMIZATION AND RF DESIGNING

DISH Wireless NETWORK
03.2019 - 08.2019
  • Perform RF planning and prediction using planet tools for NB-IOT
  • Run prediction for single site POPs using RF tool, planet on different EAs
  • Run prediction Scenario POPs using RF tool, planet on different EAs
  • Hunt frequency interference on field using spectrum analyzer
  • Collect NB-IOT data using XCAL
  • Analyze Data using XCAP
  • Update RFDS files on Field force

RF Engineer – VoLTE/LTE Optimization

AT&T - Tech Mahindra agent - Plano TX
04.2014 - 03.2019
  • Work with Neo Enterprise team to upgrade4G LTE network
  • Performed RF Planning and Optimization sites using ATOLL tool
  • Pre and Post Launch optimization for UMTS clusters and SSVs for AT&T mobility
  • Provided VoLTE and LTE network improvement recommendations to AT&T RAN team
  • Analyze and summarize test data to evaluate performance against key performance indicators (KPIs)
  • Optimize networks to meet contracted KPI
  • Provided layer management in multi-carrier VoLTE/LTE/UMTS networks
  • Provide Troubleshooting-testing support based on need during the day and night
  • Oversaw VoLTE performance optimization and analysis, identifying root causes of VoLTE drops, Radio Link Failures (RLF) and recovery, voice muting, and RTP gaps
  • Performed VoLTE regression testing in VoLTE RAN areas
  • Work with Night of Lunch team (NOL) to lunch VoLTE network on different cities and states
  • Performing functional, KPI and feature testing for VoLTE
  • IP tracing in a complex network & multi-protocol analysis
  • Ensuring VOLTE and LTE call flows compliant with3GPP specifications
  • LTE/UMTS Services regression testing using Apple, Android and air-card based devices
  • Traveling to different cities in US to specific cell sites and performing relevant regression testing during Maintenance Windows
  • Execution and Modification of test plans/reports for various test scenarios
  • Documenting clearly & accurately and escalating the discrepancies, anomalies or issues with the test case
  • Testing and analyzing telephony voice services such as call waiting, call barring,3-way calling, etc
  • Testing and analyzing proper operation with landline (PSTN) & (Mobile networks) PLMN
  • Testing and analyzing the voice quality of the voice services such as CDMA, VOLTE, etc
  • Testing and analyzing proper operation with various3G and2.5G networks
  • Work with service validation team to validate the service
  • Give training when new coworker joins the team
  • Get trained for automation test
  • Experience on Oracle databases, data analysis on SQL developer tools

RF Engineer

Ericsson - Glow Networks Agent - Sprint project - Richardson TX
08.2013 - 04.2014
  • Improve the established Network Coverage (RSCP) and Quality of Signal (Ec/No)
  • Troubleshoot problem areas and provide necessary recommendations for improving system performance
  • Accompanied Test Data analysis considering Coverage, Handover, Call Drop, Rx Quality
  • Integrity KPIs for LTE, R99 and HSPA (HSDPA/EUL)
  • Analyzing various LTE message logs, system based logs, UE logs (Collected on QXDM)
  • Detailed audit of the baseline parameter settings for the basic and optional features of the LTE (new built site) /3G network
  • Checked upload and download throughputs speed through Putty and front command speed test
  • Making IMPL (Interaction Matrix Path Loss) to simulate UMTS Sites
  • 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/GNSS and performed drive tests in different transmission sites that provide LTE service
  • Used GNSS app to follow the drive route for cluster test to collect drive test data using RF tools
  • 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

Alcatel Lucent - Verviba Telecom Agent in Kansas City
02.2013 - 08.2013
  • Performed surveys on DNA (Deployment Network Assessment) Services for the Metro Cell (AT&T) projects
  • Performance monitoring and optimization of newly activated LTE sites for seamless integration into cluster
  • 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 (RBS3200/RBS2200) and checking accessibility and retainability of the site
  • 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 all3G-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
  • Preparing FCC submissions for interference location confirmation
  • 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
  • Data Digital Communications including: DS1, DS3, Fiber, ISDN
  • Identify critical/major problems, troubleshooting issues across the market and involve multi-vendor’s investigation
  • Analyzing Drive Test data using Actix Analyzer and Spotlight, TEMS, Wind Catcher and Agilent
  • Using spectrum analyzer detect hardware and software problems
  • Coordinate with
  • Troubleshoots network and transport issues and IP configuration issues
  • Performed drive tests to determine site’s coverage and for troubleshooting

RF Engineer I

Alcatel Lucent - Verviba Telecom Agent - Richardson TX
12.2011 - 02.2013
  • 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 using Wind Catcher tools
  • 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

B.S. - Electrical Engineering

University of Texas at Dallas (UTD)
12.2012

Associate Degree in Science - undefined

Richland College
Dallas, Texas
12.2012

Skills

  • Operating Systems: Windows 7/8/81/10/Vista/NT/XP/00/98, MS-DOS, Linux, Mac OS X
  • Operating systems of UE (Android, iOS, air card)
  • Languages: C, Java, Verilog, Assembly Language, NI LabVIEW, Oracle SQL Developer
  • Radio Network Planning and Design Tools: Atoll, Planet, MapInfo, MS Excel, MS Outlook, MS Access, Google Earth, eDat, RFDS, Actix, TEMS, NEMO GNSS (Global Navigation Satellite System)
  • Basic programming experience, developing macros (they deal with a lot of data analysis and spreadsheets)
  • Strong troubleshooting skills
  • Strong post-launch and optimization skills in VoLTE, LTE, and UMTS, with excellent communication and leadership skills
  • Performing analytical, investigative activities related to wireless communication systems, including but not limited to GSM, UMTS, and LTE

Certification

  • 5G NR Planning and Design from Award Solutions(Oct01,2019 – Oct03,2019)
  • 5G NR Air Interface From Award Solutions (Sep17,2019 – Sep19,2019)

Training

  • Introduction to planning and optimization
  • LTE Network Features
  • UMTS Network Features
  • Design Tools (Atoll)
  • Post optimization Tools (Actix)
  • SQL

LAB EXPERIENCE

  • Designed, assembled, and tested linear electrical networks and systems utilizing breadboards, Keithley2430 (smu’s), AgilentMSO6000 oscilloscopes, Agilent33220A 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.

Timeline

Senior RF Wireless Design and Planning Engineer

DISH Wireless NETWORK
08.2019 - Current

RF Engineering – RF OPTIMIZATION AND RF DESIGNING

DISH Wireless NETWORK
03.2019 - 08.2019

RF Engineer – VoLTE/LTE Optimization

AT&T - Tech Mahindra agent - Plano TX
04.2014 - 03.2019

RF Engineer

Ericsson - Glow Networks Agent - Sprint project - Richardson TX
08.2013 - 04.2014

RF Performance Engineer

Alcatel Lucent - Verviba Telecom Agent in Kansas City
02.2013 - 08.2013

RF Engineer I

Alcatel Lucent - Verviba Telecom Agent - Richardson TX
12.2011 - 02.2013

B.S. - Electrical Engineering

University of Texas at Dallas (UTD)

Associate Degree in Science - undefined

Richland College

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Endalkilign Teferi Derseh