Keshav Kumar Mahankali

7418 Almaden Way, Cary, NC 27518

Cell: 248-631-6983

Keshav.mahankali@gmail.com

CAREER OBJECTIVE:

 

Seeking a challenging and growth oriented full time position in the field of RF Engineering and to be a part of a team that dynamically works towards the growth of the organization which best utilizes my skill set and experience.

 

SPECIALITIES:

 

IBwave Design Engineer having 6 years of experience in RF projects with Extensive experience with good performance record in Macro, radio network design, Construction and project management in IBS/DAS design for high rise buildings, low rise buildings, Stadiums, Metro Subway Tunnel, Airport and NASCAR Racetracks on 2G, 3G, 4G/LTE networks

-Supported multiple DAS projects in a fast-paced and ever-changing environment.
- Defined and approved DAS equipment and DAS designs for projects using iBwave software. Included both in-house and turn-key design solutions.
- Managed vendor support for benchmarking, CW testing, and turn-key design solutions to meet carrier requirements.
- Created design approval packages and supporting documentation (Reports, BOM, and Link Budgets) for landlord and carrier approvals.
- Having Small Cell (Metro Cell) IBwave Designing, experience of over 1 year.
-Worked on most of OEMs like Corning Mobile Access-TSX,QSX,HX & GX, Commscope:-ION B,ION U & ION M ,TE Connectivity:- Unison, Fusion, Spectrum & Prism & many other DAS active & passive products.
-Worked with 3^rd party vendors on Sweep/VSWR/DTF Test & Passive Intermodulation Testing (PIM).
-Involved in DAS Performance which includes Baseline Noise floor calculation, Additive Noise calculation, Downlink Functionality Testing, Uplink Functionality Testing

 

                                     PROFESSIONAL EXPERIENCE

                              AMERICAN TOWER CORPORATION

Cary, NC

 

RF Engineer DAS (Dec ’13 to Present)

·                                                                                                                                                                                                                 Designing, implementing and optimizing outdoor & Indoor DAS networks for LTE, WCDMA, GSM and CDMA carriers like Verizon, AT&T, Sprint & T-Mobile on IBwave.

·                                                                                                                                                                                                                 Regular customer interaction for the Project coordination, briefing of comprehensive system designs and cost estimates, Quotes.

·   Performing multiple site visits to ensure the construction is based on the design.

·   Carry out radio designs of Distributed Antenna Systems (IDAS or ODAS) for indoor mobile coverage to meet client specifications.

·                                                                                                                                                                                                                 Reviewing the designs, and making amendments, creating purchase order requests for the performance vendors.

·                                                                                                                                                                                                                 Management of multiple projects and Coordinate within my team and also deployment, construction, CAD teams.

·   Carry out radio designs of Distributed Antenna Systems (IDAS or ODAS) for indoor mobile coverage to meet client specifications.

·                                                                                                                                                                                                                 IDAS neutral host system Design, Performance, Optimization, Simulcast changes, Problems Troubleshoot, link budget calibration using IBwave, ATOLL propagation tools.

·                                                                                                                                                                                                                 Optimize the design to achieve the best DAS coverage dominance over MACRO based on agreed SLA with the customer & antennas location, azimuth, or tilt change

·   Evaluation/Preparation of test results and deliver to the customer.

·   Review and analyze Fiber testing, coax cable sweep and PIM testing, and Interference testing and ensure we are meeting AT&T standard

·                                                                                                                                                                                                                 Provide recommendation for base station design, which includes antenna type, antenna height, antenna location, BTS power setting, frequency allocation and database translation.

·                                                                                                                                                                                                                 Prepare the Bill of materials (BOM), Quote and Design Package , Submit to the Customer,

·                                                                                                                                                                                                                 Communicating with the construction and deployment teams to guarantee meeting customer's requirement

·                                                                                                                                                                                                                 Perform and analyze the post installation CW testing to evaluate the signal propagation by using testing equipment like JDSU

·                                                                                                                                                                                                                 Recommend and Implement Optimizations, (Physical and/or Parameter Changes), to improve network Performance (i.e., drop calls, access failure, Handover’s, etc.)

 

 

CAPITAL ONE

Glen Allen, VA

Network Administrator (Jun ‘12 to Dec ‘13)

·   Configuration, Performance testing, maintenance & troubleshooting Capital one QA Environment Applications.

·   Support day to day Administration and Web Administration by troubleshooting various applications and database issues like configuration, code and connectivity issues.

·   Installed, configured and administered Weblogic 8.1 sp3, sp4, sp6, 9.2, 11g in QA environment.

·   Involved in Upgrade and Migration from Weblogic 10.3 to Weblogic 11g.

·   Configuration of Weblogic 9.2 for both QA & Performance environments.

·   Created Weblogic instances for Windows & Linux servers.

·   Worked closely with developers and platform team in building up new domains/Infrastructure.

·   Configured and administered Connection Pools and Data Sources for JDBC connections.

·   Verify the firewall ports for capital one network to the vendor applications and databases.

·   Used Log Analyzer and Traces to troubleshoot WebLogic Server

·   Deployed new code in windows & Linux servers on regular basis.

·   Work closely with developers and QA engineers to triage and resolve build failures after the code deployment.

·   Troubleshooting the customer issues with VMWares.

·   Provided 24/7 on-call support for QA Environments.

·   Monitored WebLogic server resources using site scope tools in Performance Environment.

 

 

AMERICAN TOWER CORPORATION

Cary, NC

RF Engineer (April ’11 to Mar ‘12)

·   Preparing the RF Design and planning processes for In-building coverage using iBwave indoor propagation tool for different carriers like AT&T, Verizon, T-Mobile etc.

·   Coordinating with the planning and IBS site survey the rollout of GSM, CDMA, UMTS & LTE Network.

·   Optimizing systems for interoperability between in-building and macro as per the coverage and capacity needs.

·   In-building RF System design and implementation experience with LGC, Mobile Access & Andrew cellular and PCS distributed antenna systems.

·   Knowledge of passive and active DAS (Distributed Antenna System).

·   Created prediction outputs for SHO, BCCH, RSRP, RSRQ, Best server and generated plots for different parameters.

·   Experienced in designing for different vendors like Andrew, Mobile Access & LGC Wireless.

·   Calculating the Link budget/EIRP table and designing the schematic diagram and designing the cable routing.

·   Provide general indoor building design solutions to include coverage analysis, capacity, and interference analysis.

·   Prepared preliminary designs to verify the equipment requirement for the buildings.

·   Study on indoor Coverage prediction like model tuning, path-loss factor, Noise figure analysis of the system.

·   Specifying the technical requirements for DAS components such as repeater, combiner, coupler, power divider, Node B, antennas etc.

·   Creating Design Packages and submitting to the clients once the design meets the criteria.

·   Prepared reports for equipment list, cost details, Link budgets, etc...

·   Created Walk paths for the Post Build CW Testing.

·   Hands on experience on Passive and Active Indoor Link Budget Analysis.

·   Created MapInfo plots for Benchmark data and CW data.

·   Created the Ex-B’s as per License request form (LRF) and check for the power levels for different DAS Equipment’s.

·   Hands on Experience on creating BOM’s.

 

 

CLEAR WIRE

Orange County, LA

RF Engineer (Nov ’10 to Mar ‘11)

·   Single site verification test of newly integrated WIMAX site.

·   Post processing of drive test logs using WIND CATCHER WIMAX.

·   Perform RF drive test and optimization using HUWAEI-XCAL-X as drive test tools.

·   Conduct drive test for WIMAX Radio network optimization using X-CAL-X software as a drive test tool and conduct drive test Analysis using X-CAP-X software to determine the source of problem such as Bad coverage, frequency interference.

·   Conduct KPI TESTING, test the maximum throughput per sector of the site to ensure that the site can serve for agreed maximum number of subscriber per site.

·   Conduct CALL SUCCESS RATIO (CSSR) DROP CALL RATIO (DCR) test within the coverage of WIMAX site to test  the performance of wimax terminal in network

·   Conduct cluster optimization to improve the WIMAX coverage in term of RSSI and CINR.

·   Prepare a optimization report using X-CAP-X software in post processing the drive test data.

·   Analyzing Layer 2 and Layer 3 messages for fixing root cause of session drops and access failures.

·   Analyzed and implemented civil and parameter changes to improve network performance.

·   Troubleshoot interference and hardware issues on underperforming cells.

·   Improvement of network performance for better Acceptability and sustainability.

·   Review counter and system KPI Report with Sr.RF Engineers.

·   Report results of the test to the RF Engineer in Charge immediately and coordinate next steps.

·   Performed speed test on different sectors as per the customer requirement.

·   Develop drive test routes using MapInfo and Microsoft Street and Trips for drive test team

·   Handled six teams and was responsible for installation, setup and maintenance of tools as per the client requirements.

·   Creating the MapInfo files with respective cluster maps according to the client needs and monitoring the drive technicians when they are on drives.

 

 

COX COMMUNICATIONS

Providence RI

RF Engineer (June ’10 to Oct ‘10)

·   CW drive test data collection

·   Verify and indentify sector swap issues, PN issues.

·   Call verification and validation

·   Layer 2 and layer 3 messages monitoring and analysis.

·   Remove fwd sector cables at the HUB from DART cards and hook transmitters in fwd DART cards on sectors for CW drive testing. Use attenuators in some cases to reduce the power levels not to exceed 5db from the transmitter if necessary.

·   Set RF power measurements for CW drive testing on the ADC FlexWaveTM Prism & URH Embedded Web Server. Also look for any alarms and check with Senior RF engineer before CW testing.

·   Drive test nodes within the coverage area, verify and identify any RF power measurement issues.

·   After CW drives been completed set back the RF power measurements on the ADC flex wave to that configured for the Huawei BTS.

·   Perform static call test and verify the right sectors. Verify and validate M-M, L-M, and L-M are successfully routed and identify chip delay using the Agilent test platform

 

 

EXTENET SYSTEMS

Yonkers NY

RF Engineer (Feb ’10 to April ‘10)

·   Responsible for drive testing to collect CW node data for testing purposes to select best DAS solution

·   Completed CW site setup at test site location to ensure required EIRP signal levels were maintained.

·   Used Watt meter, Gator Transmitter, Antenna, Coax Cable and other equipments as per the client requirements for setting up the CW Sites.

·   Distributed Antenna Systems were mounted at the top of New sites eg: Light Poles, Telephone poles etc. to improve the dead spots, power efficiency and for capacity improvement.

·   Completed Distributed Antenna System (DAS) Design to provide coverage where Macro sites are not possible

·   Responsible for the outdoor DAS design & deployment for the Yonkers and Mount Vernon County, NY

·   Completed minimum 5 sites per day and uploaded the data to the Server on daily basis.

 

 

ALCATEL LUCENT

DC Market VA

Field Technical Support Engineer (Dec ’09 to Feb ‘10)

·   Working with RF Engineers on daily basis to gather the requirements and change the configuration accordingly for different drives as per the needs.

·   Going for drives on weekly basis to do stationary testing as per client requirements.

·   Worked on Agilent 14.2 and 11.1 Versions.

·   Monitoring the drive technicians when they are on drives.

·   Trouble Shooting the issues faced by the drive technicians and reporting the same to the RF Engineers.

·   Conducting meetings and providing trainings for the drive technicians on issues faced on drives.

 

 

T MOBILE

Boston MA

RF Engineer (Sep ’09 to Dec ‘09)

·   Optimization of RF networks using Actix.

·   Individual Sector Analysis using Actix.

·   Determining Tilts using the Data

·   Determine Call Drop reasons

·   Adding and deleting /neighbors

·   Post processing of data of Ericsson and nokia networks.

·   Perform RF drive testing to carry out propagation and signal measurement using TEMS investigation 8.2.5

·   Collect UE physical measurements (SC, RSCP and Ec/No) for all the cells in the active Set.

·   Collect scanner data (SC, RSCP and Ec/No, RSSI) for all the detected cells.

·   Verify Radio quality (BLER) requirement on several different radio services, Handover functionality performance, the network, site functioning properly, antenna positions, antenna directions or tilt and swapped feeders, neighbor relations list.

·   Identify major call-related problems (dropped calls, hardware problems etc.)

·   Verify Call success rate and call drop rate, UMTS basic functionality and understanding Layer 3 messages.

·   Perform an audit on power related parameter settings (Max output power, CPICH power, AICH power)

·   Export log file, Report generation

·   IRAT testing, 911 testing, Stationary testing, Shoehorn testing

 

 

BELL/HUAWEI SYSTEMS

Ontario CA

Associate RF Engineer (Jun ’09 to Sep ‘09)

·   Responsible for collecting the cluster information from the team lead and checking the cluster alarms with RNC and verifying if the parameter audits are done by RF team.

·   Creating the map files with respective cluster maps according to the client needs and setting teams as per the requirements.

·   Responsible for maintaining drive routes in MapInfo format.

·   Assisted Sr. RF Engineers in Processing and Analyzing drive data once drive test was done by the drive testers.

·   Surveyed the location with coverage holes and suggested locations to add new Cells/Sites.

·   Responsible for installation, setup and maintenance of tools required for collecting of signal data as per the scope of the client requirement.

·   Planning for number of teams and setting targets for the teams based on the size of the drive route and the capability of the drive tester.

·   Responsible for troubleshooting issues faced by the drive testers and generating hourly reports to update the status of all the clusters.

·   Collecting the log files from drive testers and uploading them into the FTP servers and process the data as per the client requirement.

 

 

 

 

 

T MOBILE

Orange County LA

Drive Test Engineer (Dec ’08 to Feb ‘09)

·   Responsible for installation, setup and maintenance of tools required for collection of signal data.

·   Conducted Drive Tests with AGILENT W1314A / DTI Data Collector that involves various measurements aimed to gather specific data.

·   Involved in collecting data, analyzing and making reports for the client.

·   Managed and Lead other Technician  teams and bridging the gap between RF Engineer and Technicians needs and requirements

·   Used Microsoft Streets & Trips navigational and mapping software.

·   Was responsible for Team management.

·   Troubleshooting of Hardware and Software on field due to unexpected errors while ongoing process of Data Collection.

·   Responsible for Grid distribution and team performance

·   Real time data uploading.

·   Planned the drive routes for testing.

 

 

 

 

Technical Expertise

Planning Tools  – iBwave Propagation, collection, Optimization  & Atoll.

Data Processing Tools - Actix Analyzer & Wind Catcher

Data Collection Tools - TEMS, Agilent, L-CAT, X-cal

GIS Software: Map Info, Microsoft Streets and Trips, Google Earth

Wireless Technologies - GSM, CDMA 2000, WCDMA, EDGE, UMTS, HSDPA, WLAN, WIMAX      

Operating Systems - Windows 98/2000/XP/Vista, UNIX (Sun Solaris), MS-DOS

Web Servers - Apache 2.4, Sun one 6.1, IIS 4/6.0.

RDBMS - MS SQL Server 2005/2008, MS Access, Oracle 10g/11g

Operating Systems - Windows Server 2003/2000, Windows XP/98, Windows Vista, UNIX

Programming Languages - Oracle, SQL, and PL/SQL              

 

Education

Silicon Valley University, Sanjose, California, USA

Masters in Electricals & Computers
 

JNTU, Hyderabad, India

Bachelors in Electricals & Computers