Babu Devnarayan Choudhary
Email: bdc@thinkclock.com, b.choudhary@imperial.ac.uk ; Tel (O): +44-(0)2075948296
Room #563, Huxley Building, Department of Computing, Imperial College London, London SW7 2AZ
Homepage: http://thinkclock.com/bdc ; http://www3.imperial.ac.uk/people/b.choudhary
PhD
[Aug.’11Today]
Graduation
[2003-07]
Department of Computing,
Imperial College London, London, UK
XII:
[2001]
X :
[1999]
84.31% Rajasthan Board
Govt. Sr. Sec. School, Raipur [Marwar], Dist-Pali, Rajasthan
83.17 % Rajasthan Board
Govt. Sr. Sec. School, Pipaliya kalan, Dist-Pali, Rajasthan
Areas of
Interest:
Wireless Communications & Pervasive Computing: Cellular networks (GSM/GPRS,
CDMA), Short-Range-Radio (Bluetooth, IR, ZigBee, UWB), Wifi, WiMax, LTE,
MIMO, GSM/GPRS chip, M2M Telematics, Mobile Application Development: J2ME,
Android.
B.Tech in Information Technology
CGPI– 7.98/10.0 (3.2/4.0)
Indian Institute of Information Technology, Allahabad, India
Embedded Systems and Sensor Networks: Processing Hardware (MCU, DSP,
FPGA), Design & Prototyping of embedded systems, Implementation using off-the-shelf
components, SDR, Sensor Motes, Embedded S/W Development: uCLinux, Java IMP
Cryptography and Information Security: In-depth knowledge of fundamentals of
cryptography & cryptanalysis, Symmetric/Asymmetric key cryptography (AES, RSA,
ECC etc), Integrity and authentication mechanisms, H/W implementation.
Communication Protocols and Cloud Computing: Client-Server Architecture,
Network-Protocol Stack (TCP/IP, WAP, ZigBee), Communication protocols (TCP,
UDP, HTTP, XEP-0124 BOSH and other custom protocols), Media Streaming using
SIP, RTP/RSTP, Inter-Process Communication, Scalable Architectures.
Digital Signal Processing: Signal Acquisition, DSP Algo’s (FFT, DFT, Sampling,
Filtering, Noise Cancellation, ANN etc.), Statistical Signal Processing,
Audio/Image/Video Processing, Encoding / Decoding, Target detection & localization
techniques.
Others: Technology driven Entrepreneurship, International Economics
-[Aug’2011-Today] Research Assistant, Imperial College London, London, UK
Work
Experience -[Sep’08-July;2011] Founding Director & Research Engineer,
ThinkClock Innovation Labs Pvt. Ltd., IIIT Allahabad
-[July’07-June’08] Associate Software Engineer, SafeNet India Pvt. Ltd., Noida
-[Jan-July 2007] Final Sem. Internship at LESTER Laboratory, UBS France
-[May-June 2005] Summer Internship under KVPY fellowship at
Department of Computer Science and Engineering, IIT Bombay
Achievements:
[1]. Awarded 75,000 INR prize, as a winner of Next Big Idea Contest 2011 organised by Intel
and Department of Science & Technology, Govt. of India in association with IIM Bangalore.
[2]. Awarded 525,000 INR (approx. $10,500) of initial funding from the TIDE scheme of Govt.
of India for my ThinkClock Tactile project.
[3]. Awarded 100,000 INR prize by Texas Instruments, as a winner in All India DSP design
Contest 2006 for project “Collision Avoidance System for Smart Automobiles”.
[4]. Awarded French International Scholarship (1000 euro/month plus airfare) from EGIDE for
final semester internship at LESTER Lab, UBS France.
[5]. Awarded Honorable Mention (including $300 prize and trip sponsorship to the award
ceremony in San-Francisco) by 43rd Design Automation Conference ( DAC 2006 ) for paper
titled “Phase Delay based Collision Avoidance RADAR for Smart Automobiles”.
[6]. Selected by ISRO/ASI as one of 20 semifinalists from across India for International
Astronautical Congress (IAC 2006) held at Valencia, Spain.
[7]. One of 6-finalists in Idea-to-Implementation 2008 -an All India Business Plan
Competition held at IIM Calcutta.
[8]. One of 8-finalists in NIRVAAN 2007 -an All India Business Plan Competition held at IIM
Lucknow.
[9]. KVPY-2004 Fellowship. KVPY - Kishore Vaigyanik Protsahan Yojana, a research
program conducted by IISc Bangalore and funded by Department of Science and
Technology, Government of India, in which about 20 students are selected from engineering
stream every year.
[10]. Project INFiANS reached up to semifinal round of worldwide contest Windows Embedded
Student Challenge 2006 conducted by Microsoft.
[11]. ILTP/MHRD fellowship for working as a project assistant at robotics lab, IIIT Allahabad.
[12]. Sun-Tracker design selected for IEEE INDICON-2004 Hardware Design Contest held at
IIT Kharagpur.
[13]. Secured 17th rank in RPET (Rajasthan Pre-Engineering Test) 2003 in general category
[14]. Awarded Rajasthan Gramin Pratibha Vikas Fellowship from class 9th-12th by State
Government.
Skill-Set:
Generic Development: Java: J2SE, Servlet, JSP, J2ME; C, C++, MySQL, SQL
Toad, XML, Shell Script, OpenSSL, Asterisk, MATLAB: Simulink, Real-time
work shop; MS Visual Studio, Rational rose (UML), Google Maps API:
static/dynamic
Java / J2ME Development Tools : Eclipse J2SE/J2EE, EclipseME, Mobile Tools
for Java (MJT), JUnit , J2MEUnit, J2ME Sun Wireless Toolkit, Apache Tomcat,
JDBC, Ant, Sun JavaMail API, Sun JavaBeans Activation Framework, Java SMS Lib
Embedded Development Tools : Siemens XT65 GPS/GPRS module with Java IMP,
Texas Instruments: DSP C6713, Code Composers Studio, Altera: Startix II FPGA,
Nios II IDE, Quartus II, SOPC builder, Microchip PIC MCU Development kit with
C18 compiler, Communication modules : ZigBee, Embedded Ethernet, SIMCOM
508 GSM/GPRS-GPS module
Soft Skills:
Good at presenting, communicating and coordinating effectively
Projects:
(1). Remote Energy Metering System
[ Sept’09-today, ThinkClock Innovation Labs Pvt. Ltd., IIIT Allahabad]
Role: Lead Developer
Skills: MCU: Microchip PIC8F8722, GSM/GPRS: SIMCOM 300 module, ZigBee: Microchip
MRF24J40MA, Metering IC MCP3909, Microchip IDE and C18 Compiler
Project involves analog instrumentation of current & voltage sensing with temper protection mechanism and
calculation of energy consumption in the load using MCU. Data from sensors of each phase are multiplexed into
one SPI port of MCU. The controller MCU is interfaced with GSM/GPRS module through UART port and ZigBee
& ethernet module through SPI ports. The energy consumption data is communicated to a central server (listening
TCP, UDP or HTTP) periodically or on-demand through GSM/GPRS or pluggable ethernet in combination with
ZigBee wireless mess network. A mechanism for two way communication with the meter is being developed using
BOSH/SIP protocols.
(2). SIP Mediator Client for routing audio/video from IP Camera to Asterisk PBX Server
[ Sept’09-today, ThinkClock Innovation Labs Pvt. Ltd., IIIT Allahabad]
Role: Lead Developer
Skills: Linux, Asterisk PBX Server, SIP, codec conversion, Ekiga SIP client, TCP/IP, UDP, HTTP
Project involves routing of audio/video data from a IP Camera (acting as a TCP/UDP/HTTP server) to an Asterisk
PBX Server (Open source Telephony server compatible with SIP clients) by developing a Mediator SIP client on
linux. The implementation is accomplished through inter-process communication (through shared memory access &
semaphores) where one process retrieves audio/video data from IPCAM writing into a shared memory and other
process fetching that data from shared memory to Ekiga SIP client (which routes to Asterisk). It also involves
conversion of audio/video codecs because of compatibility reasons.
(3). Automotive Telematics System for Remote Tracking & Monitoring
[ Sept’08-Sept’09, ThinkClock Innovation Labs Pvt. Ltd., IIIT Allahabad]
Role: Lead Developer
Skills: Java: J2SE, Servlet, JSP, J2ME, MySQL, SQL Toad, XML, Google Maps API: static/dynamic,
Eclipse J2SE/J2EE, EclipseME, Mobile Tools for Java (MJT), JUnit , J2MEUnit, Sun Wireless Toolkit,
Apache Tomcat, JDBC, Java SMS Lib
Project involves development of an Integrated Automotive Telematics System for vehicles to provide location based
services like remote tracking & voice navigation with vehicle safety features using GPS, GSM/GPRS, GIS
Technologies. The complete system is broadly modularized into following parts.
(1). Automotive Telematics Unit: This H/W device (based on Siemens XT65 GPS/GPRS module with Java IMP
profile) is having following key components and running our embedded S/W module:
(a). Location sensing module: GPS using NMEA protocol
(b). GSM/GPRS module: for communication with server running Telematics Engine
(c). Controller: Microchip PIC18F8722
(2). Telematics Engine: This is a S/W component running on server connected to internet and responsible for
receiving, parsing, interpreting the data using GIS coming from Automotive Telematics Unit via cellular network. It
supports TCP, UDP, HTTP, SMTP and SMS protocols for receiving data packets.
(3). User Presentation Module: This is client-side S/W module using which user can connect to the Telematics
Engine and locate & track vehicle on GIS map with complete history. It is a Web-based Tracking client for PC
users: a servlet fetching Google Maps using Javascript.
(4). J2ME based mobile application suite for location based services
[Sept’08-Sept’09, ThinkClock Innovation Labs Pvt. Ltd., IIIT Allahabad]
Role: Lead Developer
Skills: EclipseJ2ME, J2ME: CLDC/MIDP, J2EE-Servlet, JSP; Apache Tomcat, MySQL, Google Maps static
API, GSM/GPRS/SMS
It involves development of the following mobile applications for location based services
(a). J2me based Remote Asset Tracking using SMS/GPRS: for tracking vehicles remotely in real-time over
Google/Yahoo/OpenStreet Maps
(b). J2ME GPS Navigation Application: using Bluetooth GPS or GPS handset user can navigate himself on map
(c). Mobile GPS Tracking Application using SMS/GPRS: this applications sends GPS data to a server by GPRS or
to a other mobile phone by SMS for tracking
(d). J2ME Multimedia Sharing Application (Images, Audio, Video): user can upload location tagged
Images/Audio/Video to a server by GPRS and other users can see them on mobile using same Midlet.
(5). Software License Management System
[ july’07-June’08 at SafeNet India Pvt. Ltd., Noida, India]
Role: Developer
Skills: C, C++, SQL, OpenSSL, Cryptographic Algo’s (AES, RSA, ECC, SHA-1, SHA-2, HMAC), Design
Documentation (FDD)
Project involves development of Software license management system targeted for software vendors to enable them
to protect their applications using our client API and license management server. I am responsible for design and
development of Crypto-Layer to secure the communication between client and server in this project. During this
project I explored and used various symmetric and asymmetric crypto-algorithms (AES, ECC, RSA, SHA, HMAC
etc) and crypto tools like OpenSSL.
(6). Hardware Implementation of ECC and RSA algorithms on FPGA using Nios II softprocessor
[During final semester internship jan-july’07 at LESTER Lab, UBS France]
Role: Lead Developer
Skills: C++, MS Visual studio, Nios IDE, SOPC Builder, ECC, RSA, Sha-1, Sha-2
It involves hardware implementation of ECC-the next generation crypto-system along with RSA to speed-up and
enhance the security of public key crypto-systems using Altera FPGA and Nios II softprocessor. Programming was
done in C++ and then code was built for target hardware (Altera FPGA) using Altera IDE. During this project I
developed new side-channel resistant ECC point multiplication algo (filed for patent). Computationally intensive
part of the code (ECC point multiplication and addition) was implemented in hardware using VHDL.
(7). Collision Avoidance System for Smart Automobiles
[During 7th semester July-Dec'06, Winner of Texas Instruments DSP design Contest 2006]
Guide: Prof. M. Radhakrishna, IIITA, Team: 2 members, Role: Project leader
Skills: MATLAB: simulink, real-time workshop, TI DSP C6713, Atmel MCU Atmega 169
System assists driver to have critical decisions through audio alerts during driving to avoid accidents. It provides
information about distance and speed of vehicles in vicinity and also alerts when sees road hurdles hence making
driving easy in traffic congestion and bad weather conditions. System can also function as black-box for accident
analysis. System was implemented using TI DSP C6713, AVR Butterfly kit having ATmega 169 MCU and
MATLAB DSP support.
(8). Multiple Fundamental Frequency Estimation
[During 7th semester July'06-Dec'06, as an assigned work]
Guide: Prof. Michael Jordan, University of California at Berkeley, US, Team: alone
Skills: MATLAB: simulink, real-time workshop, audio signal processing
Project involves implementation of a state-of-art method for estimating the fundamental frequencies (F0) of several
concurrent musical sounds using perceptually motivated method. The method consists of a computational model of
the human auditory periphery, followed by a novel periodicity analysis mechanism. Estimation of multiple
fundamental frequencies is achieved by canceling each detected sound from the mixture and by repeating the
estimation for the residual.
(9). INFiANS - Intelligent Noise Filtering using Adaptive Noise Cancellation, Neural Networks and
Blind Source Separation
[During 6th semester Jan'06-July'06, as a course Project, reached up to semifinal round of worldwide
contest Windows Embedded Student Challenge 2006]
Guide: Prof. M. Radhakrishna, IIITA, Team: 4 members, Role: Project leader
Skills: MATLAB: simulink, real-time workshop, audio signal processing
This Project employs a mobile based solution for noise pollution control. It involves intelligent noise filtering
techniques ANC, ANN and BSS to filter out unwanted sound signals and enables user…
 To listen only sounds of interest ignoring crap sounds.
 To be in complete peace in a noisy environment.
 To have easy mobile conversation in crowded or cocktail party environment so that two side talkers will listen
only each other’s voice irrespective of their environments.
(10). A Kernel Level Overload Detection Mechanism for TCP Servers
[During May-June ’05 at CSE Department, IIT Bombay in KVPY summer program]
Guide: Prof. Varsha Apte, CSE, IITB, Team: alone
Skills: C, Linux (Debian/Suse), Linux Kernel, TCP/IP Layer, TCP/IP, UDP, HTTP
This project employs a kernel level overload detection mechanism for Web servers. Approach is based on SYN and
Accept queues, which a TCP server maintains at TCP layer during three-way handshake. It also predicts the
bottleneck resource (server machine or network). It was accomplished by modifying TCP/IP layer of the kernel
code.
(11). Sun Tracking System for maximizing the effectiveness of solar panel
[During 2nd semester Jan ’04 – June ’04, selected for IEEE INDICON-2004 Hardware Design Contest]
It is an electromechanical system which senses the direction of the Sun using 4-LDR sensors mounted on a cuboid
and operates a DC motor to reorient the solar panel to keep it facing always towards Sun.
Personal Information
Name:
Mr. Babu Devnarayan Choudhary
Father’s Name:
Shri Kana Ram Saincha
Date of Birth:
Aug.20, 1985
Nationality:
Indian
Languages
Known:
English, Hindi, Rajasthani
Hobbies:
Solving Puzzles, Exploring new ideas, Meditation for stress management.
I hereby certify that all the information provided above is true to the best of my knowledge.
-Babu Devnarayan Choudhary
References
Prof. M. Radhakrishna
Prof. R.C. Tripathi
Prof. Guy Gogniat
Head of the Department,
Department of Electronics &
Communication,
IIIT Allahabad, India-211012
Dean, R&D,
IIIT Allahabad, India-211012
Associate Professor,
Lab-STICC Laboratory,
Université de Bretagne Sud,
Centre de recherche - BP 92116 56321 LORIENT Cedex, FRANCE
Email: mkrishna@iiita.ac.in
Ex. Sr. Director, R&D in IT Group,
DIT, Min of Comm‟ n & IT,
(MCIT) Govt of India, New Delhi
Email: guy.gogniat@univ-ubs.fr
Email: rctripathi@iiita.ac.in