Education
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Examination/Degree
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University/Institution
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Master’s
(Wireless communication Technologies) (Jan 2011-Sep 2012) (First Class) (70%)
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Glasgow
Caledonian University, Glasgow,UK
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B.E
(Electronics and Communication Engineering) (Sep 2005- May 2009) (First class
with Distinction) (76%)
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Anand
Institute of Higher Technology, Anna University, Chennai, Tamilnadu, India.
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Inter
(Physics, chemistry, Biology, Maths) (July 2003 – May 2005) (90%)
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SRV
Higher Secondary School, Rasipuram, Tamilnadu.
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Technical Skill Set
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§ C Language
§ Data Structures using C
§ UNIX/IPC
§ GDB/DDD
§ ATDI
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§ LTE: RRC/MAC/Physical Layer
§ UMTS:RRC/MAC/Physical Layer
§ OPNET
§ MATLAB
§ Code Warrior
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Professional Experience
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Projects Undertaken
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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
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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.
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Responsibilities:
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Project 3:
Project Name: Traffic
Volume Measurements
S/W Language:
C , Data structure
Position:
Software Associate
Operating System: Linux
Debugging Tool: GDB
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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.
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Responsibilities:
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Project 2:
Project Name: RRC
Connection Establishment
S/W Language:
C , Data structure
Position:
Software Associate
Operating System: Linux
Debugging Tool: GDB
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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.
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Responsibilities:
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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
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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.
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Responsibilities:
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Areas of Interest
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Academic Work Experience
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Responsibilities
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Industrial Training
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Extra-Curricular
Activities
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Strengths
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Hobbies/Interests
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Personal Information
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Download Resume Format
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