Jan 2019 – Present · 7 yrs 2 mos · Bengaluru Area, India

Apr 2018 – Present · 7 yrs 11 mos · Hyderabad Area, India

• 5G Development Work: Here I involved in the following projects.
• 5th Generation New Radio.
• 5th Generation Narrow Band-Internet Of Things.
• Currently my work here is 5G NB-IOT part, Physical layer implementing on matlab, C directly from 3GPP specs. Within april month I have completed NPRACH, NPUSCH code on matlab, C independently and it is working as expected with respect to 3GPP specs.
• After NPRACH, I started work on NPSS, NSSS algorithms. Which was developed already by working people here. I again worked on that and solved multiple false alarms in NPSS, NSSS in the previously developed code.
• In the above algorithms, the communication chain is Data, CRC, Encoding, Rate matching, Modulation, PRB mapping, PRB de-mapping, demodulation, scrambling. de-rate matching, decoder, CRC, decoded data. Which is almost similar to 5G New Radio as well.
• First time in India, Indian Institute of Technology Hyderabad ( IITH ) brought SMW200A Vector Signal Generator and FSW Signal & Spectrum Analyzer. The generated codes I am able to send through ROHDE & SCHWARZ SMW200A, receiving through FSW SIGNAL & SPECTRUM ANALYZER. The received data decoded and observed the expected output which is same as input given to transmitter. The codes which I worked in R&S setup are listed below:
• Wired: Narrow Band Primary Synchronization Signal ( NPSS ),NR Uplink Shared Channel ( NR_USCH ) for modulations QPSK, 16 QAM, 256 QAM,NR Downlink Shared Channel ( NR_DSCH ) for modulations QPSK, 64 QAM,NR SSBurst ( NR_PSS_SSS_PBCH ).
• Wireless: NR Uplink Shared Channel ( NR_USCH ) for modulations QPSK, 256 QAM.
• I have excellent & enough knowledge on R&S setups working procedures.
• Started working on FPGA area using vivado software of Xilinx to integrate my written code. This integration is to confirm my code is working in the following levels : i) Complete attach procedure ( which covers layers of PHY, MAC, RLC, RRC, PDCP, NAS ), ii) Controller, timing parts during attach.

Nov 2015 – Present · 10 yrs 4 mos · Hyderabad Area, India

• Work in Qualcomm
• SIM / USIM Global Certification(GCF):
• + IT3 platform and Test specifications(SIM 51.0101 and 31.121, SIM Toolkit 51.0104 and 31.124, Electrical contacts
• verifying).
• + GCF Automation using perl code.
• + Covered specifications, elementry files of SIM, USIM, CSIM, ISIM cards.
• + Have basic knowledge of GSM, WCDMA, LTE, TDSCDMA, 1X(CDMA) technologies.
• + Able to handle Anritsu, CMW network systems.
• + Good knowledge on LTE (Attach procedure, TAU procedure, etc.,).
• Developed New Feature Requests(FRs) using C :
• + Qualcomm modem module MCFG feature(both on modem side as well as from APPs side).
• + SIM lock feature ( Network lock, Network subsystem lock, SP lock, CP lock, SIM / USIM lock ).
• + Emergency call feature from china, it involved CMCC(G/W/L/T), CU(G/W/L), CT(1x/L) operators for different
• RAT technologies.
• Phone Book Manager(PBM):
• + Writing records, Reading records from Phone book.
• + Have complete knowledge of all PBM elementry files and there linkages.
• ADAPT Certification:
• + Aware of AT&T scripts and there specifications (North America).
• + Able to handle ANITE setup configuration and requirements.
• + Strong grip in log analysis of GCF, FRs, PBM, ADAPT Certification.
• DSP Processes :
• + Wrote different codes for blackfin processors using eclipse software.
• + Dumped these codes in USRPs and implemented practical transceivers.
• PHY and MAC Layers :
• + I have been working on PHY and MAC Layer from my MTech project on-wards.

Jul 2013 – Present · 12 yrs 8 mos

Jul 2013 – May 2015 · 1 yr 10 mos

• M.Tech Project
• Implementation of Rotating Polarization Angle Diversity technique on Universal Software defined
• Radio Peripheral(USRP).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Guide: Dr. Radha Krishna Ganti, EE Department, IIT Madras (Collaboration with Dr.Takei, Hitachi japan)
• Description: To design, build and quantify the performance of rotating polarization technique over a software
• defined radio. This technique is useful for robust wireless transmission in M2M and D2D scenarios.
• This project involved designs and implementation of the following modules:
• + Spreading over BPSK signals for robustness.
• + SRRC filtering.
• + Inducing rotations polarization over the vertical and horizontal antenna by multiplying with appropriate phasor in
• the baseband.
• + Timing, frame synchronization and channel estimation at the receiver to combat the fast fading channel artificially
• induced by the rotating polarization.
• + Matched filtering and de-spreading.
• + Golden code in MATLAB followed by implementation in C and interfaced with USRP.
• + Samething we implemented on MAC layer as well by adding prefix and suffix to the frame.