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S.SATHISH KUMAR
vicsathish1987@gmail.com C28, 3rd floor, sector-65
+91-8527347604 Noida, UP-201301, India
Objective: To work in a challenging work environment where I can showcase my capabilities and skills in terms with the
organization requirements.
. Summary: Over 2 years of experience in 3G and 4G (Layer 2 and Layer 3) protocol stack development. Did LTE
Layer 1 project during master’s education and up to date with current technology, very much eager to learn
new concepts.
Education
Examination/Degree
University/Institution
Master’s (Wireless communication Technologies) (Jan 2011-Sep 2012) (First Class) (70%)
Glasgow Caledonian University, Glasgow,UK
B.E (Electronics and Communication Engineering) (Sep 2005- May 2009) (First class with Distinction) (76%)
Anand Institute of Higher Technology, Anna University, Chennai, Tamilnadu, India.
Inter (Physics, chemistry, Biology, Maths) (July 2003 – May 2005) (90%)
SRV Higher Secondary School, Rasipuram, Tamilnadu.
Technical Skill Set
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C Language
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Data Structures using C
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UNIX/IPC
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GDB/DDD
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ATDI
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LTE: RRC/MAC/Physical Layer
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UMTS:RRC/MAC/Physical Layer
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OPNET
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MATLAB
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Code Warrior
Professional Experience
Oct 2012 - Till date Software Associate (Nex-G Exuberant Solutions Pvt Ltd, Noida)
July 2009 – Dec 2010 Software Associate (Nex-G Exuberant Solutions Pvt Ltd, Noida)
Projects Undertaken
Project 4:
Project Name: LTE MAC layer procedure for UE side.
S/W Language: C , Data structure
Position: Software Associate
Operating System: Linux
Debugging Tool: GDB
Project Description:
Mac Layer is the center of all LTE procedures. All logical channels (BCCH, PCCH, CCCH, DCCH, and DTCH) go through the Mac Layer. PCCH and BCCH carrying MIB information does not require Re-transmission and direct mapping with PCH and BCH transport channel.
CCCH,DCCH,DTCH follows the MAC layer procedures starts from prioritization, mux/de-mux and HARQ procedures and lead the message into L1 for further transmission.
Random Access procedure starts from MAC layer and does not hold any logical channels. The pre-defined messages Msg1 and Msg 2 are used for random access procedure and RRC signaling messages are done through Msg 3, Msg 4, Msg5. Random Access control have Group A and Group B with 0 to 64 preambles for transmitting Random access procedures. It has been send through RACH to L1 for transmission.
Responsibilities:
Study of 3GPP Specs TS 36.321, TS 34.123 and writing the test Specifications.
Developing codes in C and UNIX
Documenting test reports, defect reports, and bug reports.
Documentation for High Level Design and Low Level Design.
Interact with product development team to provide best possible solution to customer requirements
Supporting activities on external team issues and good debugging skills
Good knowledge and practice of Verification process , test methodologies and Quality initiatives
Project 3:
Project Name: Traffic Volume Measurements
S/W Language: C , Data structure
Position: Software Associate
Operating System: Linux
Debugging Tool: GDB
Project Description:
Traffic volume measurements describe the traffic monitoring in UE MAC to support transport channel switching and network optimization. UE MAC layer performs traffic volume monitoring by knowing the payload in each RLC buffer to be triggered on transport channel level. It is the function of MAC to send a traffic monitoring report to RRC and then RRC will send evaluated report to the network containing expected UL traffic. The network evaluates the payload and finds suitable method to meet the demand of capacity.
MAC layers performs traffic monitoring in either periodic or event trigger monitoring and it is controlled by RRC. The periodic monitoring sends new reports periodically after time has expired. The event trigger monitoring RRC gives a range of allowed buffer value and once the transmission queue goes out of range then the alarm indication sends to RRC.
The purpose of traffic volume monitoring is to allocate the radio resources effectively. If the allocated resource are not sufficient, UTRAN will re-configure itself (radio bearers, channel allocation, transport channel configuration) and then add resources. If the allocated resources are underutilized, UTRAN may reconfigure the connection from a dedicated channel to a shared channel and other way is to lower transport format bit rate.
Responsibilities:
Study of 3GPP Specs TS 25.331, TS 34.123 and writing the test Specifications.
Developing codes in C and UNIX
Documenting test reports, defect reports, and bug reports.
Documentation for High Level Design and Low Level Design.
Interact with product development team to provide best possible solution to customer requirements
Supporting activities on external team issues and good debugging skills
Good knowledge and practice of Verification process , test methodologies and Quality initiatives
Project 2:
Project Name: RRC Connection Establishment
S/W Language: C , Data structure
Position: Software Associate
Operating System: Linux
Debugging Tool: GDB
Project Description:
RRC connection establishment is used to make the transition from RRC Idle mode to RRC connected mode. This procedure is always initiated by the UE but triggered by either the UE or the network. Network triggers RRC connection establishment procedures by sending a paging message and UE triggers in case of application usage and other applications.
RRC connection establishment uses transparent mode RLC on CCCH logical channel with SRB 0. After that logical channel mapped onto Random Access procedure (RACH) transport channel in MAC layer and then it is mapped onto PRACH in the physical layer to transfer the message. PRACH used by all UE in the cell, so it will listen AICH channel to know the allotted time slot to send PRACH message to Network.
After a setup message from network, UE configure layer 2 and layer 1 to locally establish DCCH channel with SRB1. RRC connection set up complete message is send to network through dedicated DCCH channels.
Responsibilities:
Study of 3GPP Specs TS 25.331, TS 34.123 and writing the test Specifications.
Developing codes in C and UNIX
Documenting test reports, defect reports, and bug reports.
Documentation for High Level Design and Low Level Design.
Interact with product development team to provide best possible solution to customer requirements
Supporting activities on external team issues and good debugging skills
Master’s Project (abroad):
Project 1:
Project Name: Analysis of Inter-carrier Interference in LTE under High mobility conditions.
S/W Language: MATLAB C , Data structure
Position: Student
Team Size: 1
Operating System: Windows 7 64 BIT
Debugging Tool: MATLAB version R2010b
Project Description:
The sub-carrier spacing (15KHz) is very much sensitive in OFDM to lead to frequency errors. If the receiver’s frequency is some fraction delay of sub-carrier bandwidth/spacing, It will cause interference among all carriers during that transmission. This effect causes Inter – carrier Interference due to Leakage effect in the theory of Discrete Fourier transform.
If Turbo encoder/decoder works exactly with the Shannon’s theorem, then there will not be any error. But in reality Transmitter and receiver frequency drift during transmission cause mismatch of center frequency. This leads to two problems minimized power spectral density and null point in the diagonal matrix disturbed and it cause interference from adjacent sub-carriers.
In this project, ratio between absolute frequency offset between transmitter and receiver and sub-carrier spacing are studied and kept under 0.1 ppm frequency stability. The frequency correction did using frequency offset, pilot signal and the cyclic prefix.
The matrix with the Interference aware receiver were chosen to analyses the situation, when user travelling at a speed of 350km/hr.
Responsibilities:
Study of 3GPP Specs TS 36.201, TS 34.123 and analysis Research paper for Literature/Technology survey.
The proposal have to be prepared with problem description, route map, project plan with the help of PERT/CPM and GANTT chart also describing about risk strategy of the project.
Design and the Developed coding in MATLAB C.
Documentation for High Level Design and Low Level Design.
Documenting test reports, defect reports, and bug reports
Final report documented with presentation and submitted to International Education committee.
Areas of Interest
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Wireless communication technology
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Digital signal processing
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Digital communication
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Embedded Technology
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Antenna and wave propagation
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Industrial Ethics
Academic Work Experience
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Worked as teaching assistant for Re-sit master’s students undertaking “Wireless communication” module
during the year 2011 at Glasgow Caledonian University, UK.
Responsibilities
Positions of Responsibility:
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Active member in Glasgow Caledonian student’s association for various events includes Fresher’s week,
Halloween and Global cafe.
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Treasurer in National level Technical symposium for Emphasis ‘8 for academic year 2008-2009, AIHT.
Industrial Training
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Four weeks industrial training in Air Traffic Service (ATS) in Meenambakkam Airport during academic year
(2005-06), Chennai.
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Fifteen days industrial training in BSNL head office located in Meenambakkam during the academic year
(2008-09), Chennai.
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One day Industrial visit to Neyveli Lignite Corporation (NLC) & Doordarshan during academic year 2006-07.
Extra-Curricular Activities
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As Wicket keeper in GCU cricket team and won matches against Dundee, Edinburgh and local teams.
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Active player in Lion’s club Cricket association and badminton.
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Joined in Rotary youth club association and participated in social activities.
Strengths
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Self-Motivated.
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Commitment and Adaptability.
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Leadership.
Hobbies/Interests
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Playing and watching cricket.
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Riding Bike, travel and swimming.
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Making Friends.
Personal Information
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Nationality : Indian
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Date of Birth : 10/09/1987
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Permanent Address : 18, Thirumalaiya pillai lane, Uthiramerur – 603406, Tamilnadu.
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Language Known : English, Tamil, Hindi.
S.SATHISH KUMAR
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