Fred Rooholfada

Senior RF Engineer

858-***-****

v8rx8c@r.postjobfree.com

Education

BSEE San Diego State University, U.S.A - Major in: Mobile Communication, Satellite Communication, Digital and Analog Communication, Antenna, Microwave Communication

Work Experience

June 2011_Present

T-Mobile, Indianapolis

RF Performance, Optimization Engineer

• Perform Cluster RF tuning and optimization based on drive test result to improve the RF coverage, eliminate pilot pollution, detect missing neighbor and compare before/after drive test to verify the adjustment.

• Recommend the necessary changes required to antenna orientations and antenna down tilts.

• Resolve network problems, and improve KPI to the acceptance level, and undertake BSS/RNC/Node B parameter modifications.

• Analyze network performance reports, detailed analysis of KPIs to determine network performance fixes

• Troubleshoot Sites with poor RF performance, and monitor Cell, Neighbor stats such as Call Setup Success rate, TCH Congestion, SDCCH Congestion, Drop Call Rate, UL/DL quality.

• Responsible to resolve day-to-day issues and support regions to deliver KPI of every UMTS cluster

• Determine the 3G RAN (Radio Access Network) KPIs, such as Call setup success rate, Retain ability, Accessibility, RRC setup success ratio, dropped call ratio, RAB setup success ratio.

• Data throughput and latency analysis including HSDPA & HSUPA & Improvement recommendations.

• Responsible for tracking all the major problems on both RF optimization and Equipment related. RF Engineer Optimization 42

• Worked on Dual carrier optimization (S15-17)

September 2010-May 2011

AT&T Mobility, Michigan

RF Performance, Optimization Engineer

• Responsible for optimization of UMTS, WCDMA cell sites for the AT&T 3G Network in Detroit market.

Reviewed Alcatel-Lucent,Ericsson drive test data, proposed

Antenna modification and neighbor list.

Validate parameter and neighbor lists in Lucent WMS, verify scrambling code, AT&T GNG report (KPI) for UMTS carrier, Load balancing, HO parameter.

Model proposed antenna changes in ATOLL prediction tool, and determined if changes are benifical, and modify as necessary.

Knowledge of different RAB services (CS, PS, HSDPA, EU).Training on LTE.

April 2008 – September 2010

Qualcomm, San Diego, California

Senior Engineer with UMTS I&T team

• Perform Field Testing in Seattle for T-Mobile & AT&T, finding & debugging Major customer issues.

• SU Regression for new Targets, Testing & Debugging of customer related issues. Testing different target Build

• Performed field tests on live AT&T networks to check the functional behavior of HSDPA under various environmental conditions.

• Compared the uplink and downlink performances of two different 3G data cards on live AT&T networks.

• Worked on the testing and verifying of physical layer requirements for complex digital modem ASIC products supporting WCDMA (Rel99, Rel5 and Rel6) and GSM technologies.

• Analyzed and worked on Radio Link Control (RLC) layer Optimization using tools such as ASIA Test Manager, QXDM and Active State Perl.

Dec2006-March 2008

Design RF Engineer

Nextg Networks (Design DAS Networks for Major cities in U.S)

• Designed DAS Networks by using propagation tool Celplan ,and final product as proposal for cities like (Philadelphia, Boston, LA, Seattle , Las Vegas ,St.Louise,Chicago) ,which some of them ended up contract with major carriers in USA.Created Link Budge design.

January 2006-November 2006

Design RF Engineer

Metro PCS (Design the PCS CDMA Network for LA Market)

• Issue the Search Area Map (SAM) using the prediction tool (Planet EV) and visiting the area.

• Candidate evaluation, approve/reject

• Attend the site walks to choose the optimum location for antennas

• Issue RF configuration sheet

• Attending weekly deployment, Design review meeting

• Propagation Model Tuning.

April 2000 –January 2006

Design RF Engineer

WFI

Cingular (Los Angeles Design, Optimization & Performance)

• Design of new GSM sites (infill & capacity).

• Propagation analysis and coverage design.

• Site feasibility walk and candidate approval

• Plot generation for zoning (Coverage & C/I).

• Construction drawing review.

Maintained a zone of 60+ sites, Monitored health of the GSM network during

The Nokia to Ericsson swapout.Dual OMC dual band 850/1900 environment

Unique challenges for performance engineering, presented unique problems

Like intra vendor handoff failure and corrupt statistics .Assisted in

Troubleshooting such problems.routine optimization tasks such as

Daily multiple hardware checks, channel resources reports, hard down

Reports .Interfaced with the operation team in resolving hardware

Problems.Monitored daily and weekly statistics reports in trending and

Optimizing the network.Assisted hardware engineers with growth and TRX

Addition performed load balancing and with 850/1900 layers.Interfaced with

Customer and assisted in resolving complaints, also responsible for special

Projects like growth planning and new site justification.

Design RF Engineer

WFI

AT&T Wireless (LOS Angeles Optimization)

• Performed Single Site Functionality Test (SCFT) for new GSM Sites.

• Collected data and field measurement for GSM Network using TEMS I Investigator.

• Single site and Baseline testing for Dual Band Implementation.

• Post Processing and analysis of Collected Data using Net Optimizer.

• Tracking and verifying site data.

• Making variety of plots/reports available

Design RF Engineer

WFI

Projects Assignments with WFI

Verizon Wireless (E-911)

• Perform site coordination, surveys and calibration E-911 phase 2 implementation.

• Prepare survey, calibration and testing procedure. Develop, manage and maintain database of sites in individual market.

Design RF Engineer

WFI

Western Wireless Corp.

CDMA Overlay on Existing AMPS Network WWC Project

• Optimization of CDMA Network in Rural North Dakota.

• AMPS Network Base lining, CDMA Spectrum Clearance and Optimization.

• Usage of TEMS, Actix, FICS, Grayson WMS, HP Spectrum Analyzer, Qualcomm CAIT,

• Agilent E74xx series and E6474A CDMA Optimization Solutions.

Design RF Engineer

WFI

AT&T Wireless

Houston, Texas

IS136 technology-Lucent (Optimization)

• Planned and conducted site functionality tests.

• Verified and modified neighbor lists to ensure good handoffs among sites within a system.

• Updated neighbors in lucent switch. Usage of FICS.

• Ensure good call quality by identifying and reducing interferences.

Design RF Engineer

WFI

Scorboad/AT&T

Los Angeles, San Francisco, Sacramento-CA

• Main responsibilities included traffic analysis of the AT&T network in LA, SAF, SAC county during peak hours

• Using Scoreboard product and DTX receiver.

• Collecting switch parameters log files for the purpose of channel allocation analysis and interference recognition.

• Setting up clusters for each region in the LA,San F,SAC county to suit the purpose of sufficient data collection during peak hours.

• Collecting measured network data by using eight receivers that scans 353 channels

• simultaneously used in the network. Processing and analyzing the data collected for

• Purpose of downloading it to the switch for dynamic channel allocation and channel

• Borrowing to ease the traffic on the network and improve call quality.

Design RF Engineer

WFI

SkyRiver Communications

• Setting up a wireless point-to-multipoint IP based broadband wireless access network using Direct Sequence Spread Spectrum technology in the 2.4GHz unlicensed frequency band.

• Conduct laboratory/bench and field trials to check capabilities and features of Broadband IP-based wireless products from Solectek, Breeze Com, Adaptive Broadband, and Lucent Technologies, also testing of frame error rate, latency, and maximum throughput of broadband equipment using Smart Bits data analyzer

• Installation and configuration of Solectek SkyWay direct-sequence spread Spectrum radio equipment and antenna of the first 3 cell sites, including Sectorization

• Field trial involves in -building and line-of-sight outdoor propagation tests. RF drive test procedure includes setting up of location test points referenced W/MapInfo; preparation of path profile and link budget using Micro Path; Gathering of actual signal captures using spectrum analyzer Anritsu or HP/Agilent; and throughput tests w/extensive file transfer using ftp client/Server computers

Design RF Engineer

WFI

IP Wireless

• MMDS interference analysis study conforming with the FCC rules, using CelPlan

• RS Grid Generation, Power Flux Density Analysis, BTA Analysis, Co-Channel and Adj-Channel Interference, Noise Floor Studies, Region and Class Analysis, Worst Case RS Generation, BTA-RSA-PSA Interference Analysis

• Prepare Interference Exhibits for FCC License Application Filing [design of two-way PTMP systems using W-CDMA technology at 2.5 GHz

Design RF Engineer

WFI

Metricom Inc.

• Drive Test for Novatel-Modem at ISM band using frequency hopping

• Detailed research and development of a fully contained database using Visual Basic consisting of the Broadband Wireless operators in Latin America.

January 1999 – February 2000

Technical Engineering, Global Access Telephone & Technology,

Escondido, CA

• Helped Senior Engineer in designing new pager

• Involved in all stages of prototype from building the pager to testing

• Repaired both Pocsag and Flex pagers

• Worked as technical support regarding the pager developed.

• Involved in component selection and PCB layout

January 1998 – January 1999

Technical Engineering, Nellor Puritan Bennet, Carlsbad, CA

• Performed investigation on filed return and manufacturing failure on Ventilators

• Executed tests as part of new design activity for ventilator

• Developed a new protocol for new ventilator, a set of test procedures

• Involved in technical support for customers,

• Worked with FDA representative for meeting the requirements

• Documented the requirements and all processes followed

January 1997 – January 1998

Technical Engineering, Uniden, San Diego

• Built prototype modem and test fixture

• Troubleshoot the CDPD by using HP VEE

• Usage of Oscilloscope, Frequency generator, Spectrum analyzer, RF generator, Radio Base station test sets

• Helped senior RF engineer in designing CDPD with requirement from FCC

• Worked on testing and development of GSM products.

• Developed and implemented test plans: Development of test procedures to verify the functionality and performance requirements of the CDPD-900 modem.

• Developed detailed scope and procedures for testing

January 1996 – January 1997

Technical Engineering, RG Electronic, San Diego

• Diverse electronic manufacturing and R&D environment experiences

• Member of a team responsible for developing RF amplifiers and power supply

• Supervised staff of 15 people in a production environment.

• Test and repair of RF amplifiers, Base station, alarms, Power Supply

• Experience with power supply design

Skills/Tools

• Propagation tools such as DBPlanner, CelPlan, CelFCC, Planet EV, and ATOLL

• Gis tools such as MapInfo, Training on LTE

• Programming languages such as C, Pascal, Visual Basic

• ActixOne, Prospect, Net track, XTEL, ASPECT, QXDM,RMAP,T_PIM

• PDM, FoxPro, Microwave, Communication Circuit Design, Magnum KPI

Signal Processing, and Digital Design, Citrix, NTD

TEMS (optimization TDMA), FICS, Lucent switch (AT&T wireless)

Alcatel_Lucent, Ericsson,Nortel(2G),Nokia(3G)

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