Yan Zhang

1. Yan Zhang
(773)-526-2810
Roseville, CA 95678
dougie.zhang@gmail.com
SKILLS / PROFICIENCIES
 Proficientin Excel, Word, PowerPoint, Atoll, MapInfo,TruePath, Google Earth Pro, QXDM,
Wireshark,TEMS Investigation,Huawei Genex Unet/Probe/Assistant/Cloud/OMStar, Huawei
M2000/U2000
 LTE/VOLTE/UMTS/HSPA/WiMAX/CDMA RF performance and troubleshooting,
 Good knowledge of LTE/VOLTE/WCDMA principle,network structure, protocol,physical layer,
signalingprocedures,call flow.
 Good understandingof eNodeB/NodeB/RNC configuration & operation.
 8 years’experience of LTE/VOLTE/WCDMA radio network planning, RF tuning & optimization.
 8 years’experience of network deployment, system test and lead optimization team in projects.
EXPERIENCE
NETSCOUT Berkeley CA 09/2018 – Now
RF Engineer
AT&T FWLL/5GCalibration Project
 Analyzed incomingfield testing CW (continuous wave) path-loss data usingNETSCOUT TruePath &
TruePath Databasetools,providetechnical supportto field engineers.
 Proficientin LTE RF designingsoftwarelikeAtoll. Understandingof clutter maps, clutter height and
DTM models.
 Tuned SPM/Cost-Hata/Aster Propagation Model for different clutter types. have knowledge of
propagation models used for Dense Urban/Urban/Sub Urban/Rural areas.Proficientusing
MapInfo/Google Earth software for daily activities.
 Used Atoll/TruePath to create path loss propagation models based on field data for given
geographical location desired by client.
 Provided updates and recommendations on current coverage models used in network by clients.
Huawei Technologies Co., Ltd. Shenzhen China 12/2011 – 06/2017
Sr. RF Design/Optimization Engineer / Wireless Product Engineer
Project Experience:
China Telecom Guangdong Province LTE Project 12/2016 – 06/2017
RF Engineer Technical Lead of 3 cities – (Yangjiang/Maoming/Zhanjiang)
 Responsiblefor leadingoptimization teams to do SSV/cluster tuning /RF optimization/parameter
tuning of LTE/VOLTE network as well as maintain and improvingKPI of livingCDMA/LTE/VOLTE
network. Data collection/analysis and tuning duringthe Post Lunch Tuning service.
 Used Unet/Atoll to design LTE/VOLTE neighbor/PCI/ PRACH, min reuse distance/tiers check,PCI
Mod3 check. RSRP/RSRQ/SINR simulation accordingto customer requirement.
 Understandingof clutter maps, clutter height and DTM models.
 ProficientusingMapInfo/GoogleEarth software for daily activities.
 Performed Atoll predictions and traffic analysis & maintained RF Design Sheets and CIQs for cluster
sites.Ran RSRP, SINR, Best Server, Throughput plots.

2.  Meeting and surpassingKPI (accessibility,retain ability,Integrity,Mobility,Availability) targets from
these activities allowed to launch new LTE markets faster/on agreed timelines thereby
improving the overall end user experience on the networks.
 Optimized VOLTE parameters such as DRX/SchedulingAlgorithm/Inactivity Timer based on
different QCI/servicespecification.
 Based on KPI likePRB utilization/user experiencethroughput provide carrier expansion suggestion
to customer.
 Re-farmed partial CDMA Frequencies for 5 MHz bandwidth L800 network new launch.
 Baselinecell parameter configurations checking& modification. Inter-Frequency Load Balancing&
CA related parameter tuning.
 Used Huawei Genex Cloud platformand MR/SIG data of LTE network to do Indoor and Outdoor MR
Coverage Geographic Evaluation
 Fine tuning of the ANR (Automated Neighbor Relations) policy settings and related parameters,
Improved handover success ratefrom 95% to 98%.
China Unicom Guangdong Province FDD-LTE Project 02/2014–12/2016
RF Engineer Technical Lead of 2 cities - (Zhongshan/Zhuhai)
 CSFB latency tuning & Flash CSFB/VOLTE deployment, 4G-3G neighbor tuningfor Flash CSFB/
VOLTE. IRAT parameter optimization includingidlemode cell reselection and connected mode
redirection.
 Leading optimization teams to do SSV/cluster tuning/RF optimization/ parameter tuning of
LTE/VOLTE network as well as maintain and improvingKPI of livingLTE/VOLTE network. Identify
problem cells,includingany build issues.CQI bad cells & KPI bad cells & RSSI bad cells identification
and tuning.
 From firstmodeling sitepeak throughput test & demo to 2000+ eNodeBs each city,responsiblefor
Pre-Launch and Post Launch planning and optimization.
 Used Unet/Atoll and China Unicom 3G& 4G sites information to do LTE/VOLTE pre-lunch coverage
prediction,providingsuggestion for customer 4G siteselection.
 CSFB latency tuning & Flash CSFBdeployment, 4G-3G neighbor tuning for Flash CSFB. IRAT
parameter optimization includingidlemode cell reselection and connected mode redirection.
 Leading optimization teams to do SSV and cluster tuning/ RF optimization of LTE/VOLTE network as
well as maintain and improvingKPI of livingLTE/VOLTE network. Identify problem cells,including
any build issues.CQI bad cells & KPI bad cells & RSSI bad cells identification and tuning.
 Used Unet/Atoll to design LTE/VOLTE neighbor/PCI/ PRACH, min reuse distance/tiers check,PCI
Mod3 check. RSRP/RSRQ/SINR simulation accordingto customer requirement.
 Design new cell sites and enhance/expand existingcell sites.
 Optimized VOLTE parameters such as DRX/SchedulingAlgorithm/Inactivity Timer based on
different QCI/servicespecification.
 Monitor and report MQI of all 12 Huawei cities in Guangdong provinceweekly to China Unicom
customer. My 2 cities always lead in thewhole province.
 Baselinecell parameter configurations checking& modification.Inter-Frequency Load Balancing&
CA related parameter tuning.
 Benchmark rankingimprovement planning/optimization,includingRF tuning/ Antenna changes/
SFN / latency and throughput improvement/ parameter tuning. My 2 cities lead in every year’s
benchmarkingrankingof 3rd party drivetest.
China Mobile Fujian Province TDD-LTE Project 11/2013–02/2014
RF Engineer Technical Support of Quanzhou city sub-project
 Used Unet/Atoll and China MobileTD-SCDMA site information to do LTE/VOLTE pre-lunch
coverage prediction, providingsuggestion for customer LTE/VOLTE siteselection.
 Used Unet/Atoll to design and plan LTE/VOLTE neighbor/PCI/ PRACH, min reuse distance/tiers
check, PCI Mod3 check. RSRP/RSRQ/SINR simulation accordingto customer requirement.

3.  Work with customer planningengineer to do site survey of TD-SCDMA sites,provideplanning
suggestion for 3G/4G co-sitedeployment.
 Review drive test reports of SSV and cluster tuning. Train subcontractor test team how to use
Huawei testing and loganalysistools and howto output reports.
Tanzania Airtel 2G/3G/IP MW Modernization Project 12/2012–11/2013
Wireless Product Engineer Technical Director of 3G sub-project
 Delivered 5 RNC and 500 NodeB. Responsiblefor RNC and NodeB high level design/ commissioning
/integration. Responsiblefor Iub/ Iu-CS/ lu-PS /Iur interface data preparation and peer negotiation,
IP planningfor Iub interface.
 Responsiblefor PurchaseOrder and Material Request of NodeB/ RNC installation and integration.
Responsiblefor Airtel 3G wireless network technical request management.
Tanzania Vodacom WiMAX 16e Project 06/2012–12/2012
Wireless Product Engineer Technical Director
 Delivered 77 BS and 1 WASN and 1 M2000 and 500 CPE. Successful swapped NSN WiMAX 16d
network in Tanzania capital city Dar es Salaamfor one night, including 22 BS and 200 CPE. (all
enterprise subscribers)
 Responsiblefor AP Manager/WASN/BS commissioning and integration,R6 interface data
preparation,CPE subscriber profileconfiguration on AAA server.
 Troubleshootingof choppy voiceand jitter of VoIP in call center application scenario.
Tanzania Zantel 3G Expansion Project 02/2012–06/2012
Wireless Product Engineer Technical Director
 Delivered 2 RNC and 135 NodeB. Successful delivered 1 RNC and 75 NodeB in 20 days,assured
Zantel 3G commercial lunch in Zanzibar island on schedule.
 Responsiblefor RNC and NodeB high level design/ commissioning /integration.Responsiblefor Iub/
Iu-CS/ lu-PS /Iur interface data preparation and peer negotiation, IP planningfor Iub interface.
 Responsiblefor PurchaseOrder and Material Request of NodeB/ RNC installation and integration.
Responsiblefor Zantel 3G wireless network technical request management.
Chinacomm Engineering Ltd. Guangzhou China 07/2009 –11/2011
RF Engineer
Project Experience:
China Unicom Zhuhai HSPA+ Optimization Project
 Leaded test team to finish HSPA+ cluster DT and output DT reports. Identified throughput issues
likePDSCH codes / FTP / transmission/ poor coverageor poor CQI.
 Worked with transmission engineer to verify dual stack for HSPA+ network. Worked with Ericsson
engineer to do HSPA+ parameter tuning.
China Unicom Multi-Carrier HSPA Field Trial [Ericsson Zhuhai Field]
 Worked with Ericsson Engineer to finish field trial testcase,includingIndoor/Outdoor scenario,
singleuser peak throughput, multi user conversation /video/ throughput/load, handover, multi-rab
test.
 Responsiblefor test loganalysis and testreport output.
China Unicom WCDMA HSPA+ Field Trial [Ericsson Zhuhai Field]
 Responsiblefor HSPA+ cell and neighbor planning with Atoll and MapInfo.
 Responsiblefor cases testing/ log analysisand reportdrafting.
China Unicom Zhuhai WCDMA roll out project

4.  Responsiblefor WCDMA cell and neighbor planning with Atoll and MapInfo.
 HSPA parameter tuning. City borderlineinter-frequency handover parameter tuning like2d/2f
events thresholds,hysteresis & offset values.
 Drive test for SSV/ cluster tuning. Antenna adjustment and RF tuning. DT log analysisand report
output.
EDUCATION
Bachelor of Science in Accounting, Guangdong University of Foreign Studies GZ, China 2009