Summary
Overview
Work History
Education
Skills
Timeline
Generic

SANJEEV KUMAR

Bangalore

Summary

Dynamic wireless technology professional with 17 years of extensive experience in 5G, 4G, ORAN, Physical layer frameworks & controller, specializing in advanced system design, implementation. Proven track record in developing high-performance, low-latency, and scalable network solutions, guiding projects from initial concept and simulation to real-time deployment. Expertise in integrating complex features into commercial-grade systems while fostering collaboration across teams to deliver robust solutions. Recognized for effectively addressing critical performance challenges under tight deadlines and driving innovation within emerging network technologies, with a strong commitment to advancing wireless connectivity and shaping the future of communication standards.

Overview

19
19
years of professional experience

Work History

Chief Technical Specialist

Radisys India Pvt Ltd
02.2020 - Current
  • 5G NR Layer-1 Development: Developed O-RAN architecture-based gNodeB L1 framework including BBUPool task management, multicore architecture, latency & memory optimization, logging frameworks and FlexRAN PHY uplink chain enhancements
    with Intel x86 platform.
  • Feature Design & System Scalability: Led design and deployment of features like dual L1 instances for TDD+FDD deployments, dynamic cell addition & deletion, UL chain tasks prioritization, load-agnostic signal handling, and configurable various L1 logging to improve robustness and scalability.
  • Performance Optimization & Validation: Drove UL chain enhancements from conception to validation with CN, CU, DU, and RU, achieving reduced UL latency, higher throughput, extended cell coverage, and resilience to
    dynamic UE traffic.
  • Advanced Concept Research: Conducted concept validation for 5G KPIs using ML algorithms (Random Forest, LSTM) and tested gNB receiver chains for high-speed trains and NTN in high delay-doppler environments with pre-6G waveforms.
  • Leadership & Collaboration: Drove and mentored team members, enforced development methodologies, coordinated with MAC, PHY, and RU teams, managed feature lifecycle including estimations, code reviews, SIT/SVT verifications, and ensured timely field deployment of features.

Senior Chief Engineer

Samsung Research Institute
03.2018 - 02.2020
  • LTE eNB PHY & Layer-1 Development: Designed and implemented PHY framework and Layer-1 controller features including UL 256QAM, MU-MIMO, PMI selection, and HARQ buffer management, with efficient multicore task synchronization and hardware/DSP interfacing.
  • Cross-Platform PHY Coding & Modem Ownership: Developed PHY controller code on Marvel/Octeon ARM/MIPS platforms, contributed to next-gen SOC/PLATFORM design, memory management, and MAC/baseband interface finalization.
  • Validation & Verification: Conducted end-to-end feature validation using simulators and evaluation boards, ensuring successful IODT/SIT/SVT verifications and field deployment.
  • Collaboration & Delivery: Coordinated with MAC, PHY, RRH, and algorithm teams, managed estimations, code reviews, and ensured timely delivery of features.

Staff Engineer

MediaTek Bangalore Pvt Ltd
12.2014 - 02.2018
  • WCDMA UE PHY & Layer-1 Development: Designed, implemented, and supported Layer-1 drivers for UE modem downlink modules across 3GPP releases (R99, HSPA, DC-HSDPA, E-FACH), including interfaces with Firmware, RF, UMAC, and RRC.
  • Modem Ownership & Optimization: Full ownership of Rx modules, developing low-power features, and optimizing memory (SRAM/EMI/Stack) and power performance across multiple chipsets.
  • Validation & Chip Bring-Up: Led end-to-end feature validation, new chip bring-up, design verification, and support for under-development chipsets through simulation, standalone L1, integration testing, IOT, GCF, and field testing.
  • Team Mentoring & Issue Resolution: Mentored new team members, addressed customer issues globally, performed code reviews, and ensured timely delivery with proper acceptance criteria.

Technical Lead

Alcatel-Lucent India Ltd/HCL Technologies
05.2012 - 12.2014
  • WCDMA NodeB PHY & Layer-1 Development: Supported physical layer, DSP, and Layer-1 controller development across 3GPP releases (R99, HSDPA, HSUPA, DC-HSDPA), including interfaces among PQ3, DSP, FPGA, and ASICs on NodeB MODEM boards.
  • Platform Feature Development & Optimization: Developed NodeB platform features, improved log collection mechanisms for reduced memory/time, created APIs and performance counters, and implemented scripts to automate log collection.
  • Issue Resolution & Change Requests: Analyzed and resolved DSP functional issues from labs and field, delivered fixes with proper acceptance criteria, and implemented improvements for faster issue analysis.
  • Collaboration & Agile Practices: Performed code reviews, developed features for upcoming releases, and actively contributed as part of Agile Scrum/Kanban teams.

Software Engineer

Aricent Technologies
12.2010 - 03.2012
  • Next-Gen BTS DSP/L1 Development: Developed and ported advanced GSM BTS Layer-1 software on multi-core DSPs, including load manager and scheduler design, module interfacing, hardware testing, bug fixing, and preparation of design/functional documents.
  • Audio/Speech Codec Optimization: Optimized audio/speech codecs in C and assembly for LSI DSPs, reducing processor cycles (MCPS), memory usage, and performing porting, testing, and performance analysis.
  • WiMAX MAC Layer Development: Designed, implemented, and tested WiMAX 802.16m L2 MAC layer modules, including MIMO features, requirement analysis, coding, bug fixes, and module-level documentation.

Sr. Project Engineer

Wipro Technologies
05.2009 - 12.2010
  • GPS Baseband Signal Processing: Developed and implemented acquisition and tracking loops for GPS navigation signals, covering PHY layer, DSP algorithm design, and hardware interfacing on DSP and FPGA.
  • Algorithm Optimization & Porting: Optimized DSP algorithms for baseband processing, generated code using cross-compilers, and ported solutions to DSP and FPGA platforms.
  • Validation & Field Testing: Validated acquired GPS data against reference datasets and conducted field validation of GPS receiver performance.

Engineer-Operations

HFCL Satellite Communication Ltd
03.2006 - 01.2007
  • VSAT Network Operations: Managed VSAT network operations for live video broadcasting, ensuring reliable signal transmission and network performance.
  • Equipment Handling & Monitoring: Operated and maintained high-power amplifiers (HPA), encoders, spectrum analyzers, and antennas for end-to-end broadcast quality.

Education

M.E. - Communication Engineering (Full Time Regular)

BITS Pilani
India
01-2009

B.E. - Electronics & Communication Engineering

DCE
Gurgaon
01-2005

Skills

  • Architect, SME, Scrum Master, Mentor, Technical Lead
  • PHY Modem Framework, L1 Controller
  • Embedded Systems
  • C, Python, Matlab
  • Digital Signal Processing (DSP)
  • FlexRAN, ORAN, FAPI
  • 3GPP Specifications
  • Multi-Core Processor Architecture (x86, MIPS)
  • End to end system design and implementation
  • GIT, Perforce, bit bucket, Jira
  • E500, Propsim, Signal Generators, Radio Units

Timeline

Chief Technical Specialist

Radisys India Pvt Ltd
02.2020 - Current

Senior Chief Engineer

Samsung Research Institute
03.2018 - 02.2020

Staff Engineer

MediaTek Bangalore Pvt Ltd
12.2014 - 02.2018

Technical Lead

Alcatel-Lucent India Ltd/HCL Technologies
05.2012 - 12.2014

Software Engineer

Aricent Technologies
12.2010 - 03.2012

Sr. Project Engineer

Wipro Technologies
05.2009 - 12.2010

Engineer-Operations

HFCL Satellite Communication Ltd
03.2006 - 01.2007

M.E. - Communication Engineering (Full Time Regular)

BITS Pilani

B.E. - Electronics & Communication Engineering

DCE

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