Gyeong H o ( Robert) Choi

***Almador, I rvine, CA92614

acfokj@r.postjobfree.com

Cell: +1-562-***-****

August, 2014

Wireless N etwork specialist

Don’t you select my passion from the pride of life,

h unger of success?

Career Objective

Chief Technology Officer or Senior staff position in wireless i ndustry d rawing on

extensive experience in system engineering, equipment development and cell

p lanning, system optimization over any type of wireless networks . Work in a

t eam-based wireless RF system development, performance testing, cell planning,

and optimization.

Summa ry of Qualifications

Hands-on professional with 20+ years’ experience in wireless RAN system

development & engineering; evaluating user requirements, generating technical

specifications, managing 3rd parties, executing system integration test and

optimization, handling all over field t roubles.

• Experienced with various RF solutions including RF repeater, DAS, RRH, TMA, Femto cell, Pico

cell, Macro BTS, and RF functional blocks. Worked in SK telecom R&D Center as one of pioneer

of CDMA technologies in the world for 10 years.

• Particular strengths in in-building coverage solutions such as RF Repeaters, DAS, RRH, TMA.

• Highly experienced in RF system development, testing, optimization, vendor sourcing, 3 rd parties

managing. Proficient use of RF test equipment and tools.

• Executed technical consulting service for D-TAC in Thailand, a Brazilian wireless carrier, and

Wave Electronics.

• Worked in the fixed network from subscriber line to transmission line including exchangers for

over 10 years.

I ndustry-Related Experience

• Owner of Global Marketing Source, I nc., I rvine, CA : F ebruary 2010~Present

Consult ing as a technical consult ant for a M anufacturer that is supply ing t heir

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products t o A LU .

• Chief Technology Officer, SK telesys U.S.A., Cer ritos, CA : J une 2006 –

J anuary 2010

To get into the U.S. wireless Carrier markets such as VRZ, Sprint .

- Executed the technical meeting with carriers concerning better solutions for in-

building

coverage and new wireless technology such as WiMAX and LTE .

- Generated the User Requirements and Technical Specification.

Managed the H/Q’s R&D team in developing and all kinds of testing.

- required Performance test, Reliability test, Qualification test, and Acceptance test

Conducted all operating activities including field t raining, handling of field t roubles.

Consulted with the R&D team to upgrade system or equipment.

- Generated technical report and proposed new solutions.

• As a general manager at SK telecom R&D Center, Seoul, Korea : A ug., 1995 –

M ay 2006

As a team leader of BSS in R&D Center of SK Telecom, developed Base Station and

B TS Controller and launched the CDMA Network for the first t ime in the world.

Conducted the technical consulting service as a senior engineer of SK Telecom in

B razil (CDMA) and Thailand (GSM).

Managed t he budget of $1.5billion per year, exhumed t he vendors, new technologies,

and solutions.

Developed the BTS, RF Functional Block, Repeaters, DAS, DMB Gap Filler, the

O &M tools such a Remote Monitoring System to enhance the performance or QoS of

overlaid networks with CDMA (1x, EVDO), WCDMA, WiMAX.

Conducted the RF system Design, engineering, Performance Test, and Cell

engineering & Optimization.

Qualified various mobile terminals : CDG test

• As a team leader a t the centralized O& M center in Korea Telecom, Seoul,

Korea :

Nov., 1986-July 1995

launched commercially the fully digital exchanger after acceptance system test

(S1240, NO5 ESS, TDX Series)

Conducted the Emergency System Recovery actions and Optimization of system

parameter.

Planning the subscriber line and t runk line in Korea Telecom, November 1986 – May

1989

Drawing & Executing the cable line, pipeline

Conducted the network synchronization

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Education& Certification

• Master of the Information and Telecommunication Engineering, Feb 2004,

U niversity of SeJong, Korea. T hesis: “The algorithm of interference cancellation

system in wireless communication”

• BA in Electronics Engineering, Feb 1983, University of Chosun, Korea. T hesis: “The

consideration for the possibility underground communication.”

• Information & Telecommunication Engineer (Top Class 1) : National Certification

• Teaching License in M iddle & H igh school

Skill & Accomplishments

• Technologies: IS-95, cdma2000 1x, EVDO, GSM, GPRS, UMTS (HSUPA ), 802.16a, e,

VoIP, LTE .

• Lab Equipment ability in all test equipment s.

Spectrum Analyzer, Network Analyzer, BTS & MS signal Emulator

Phase simulator, Chamber Test

• RF System design and Performance Test

MS, BTS Minimum performance Requirement Test on DL/UL.

System power budget including LBA, S/N Ratio, NF, Spurious, Delay

• Qualification testing for various mobile terminals

• Awarded by the CEO of KT for the contribution of surpassing 20million subscribers

i n 1983.

• Launched commercially 23 local exchangers named S-1240 for KT fixed line network.

• Developed more than 100 RF repeaters and Base Stations for SKT.

• Awarded by CEO of SKT for the contribution in commercial launch of world first

cdma2000 1x-

E V DO service in 2001.

• Awarded by the President of the republic of Korea for the contribution in telecom

service supporti -ng of the Olympic Game in 1988.

• I hold currently about 50 patents related to the field of RAN in recent years.

End of Document

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