ROGITHAA CHANMUGAVEL

L1 UL/DL Procedure Development (LTE Cat-1)

• Implemented L1 UL/DL procedures for LTE Cat-1 devices with MAC-PHY, MAC-RRC, and MAC-PDCP integration using IPC mechanisms.
• Focused on uplink modules including PRACH, PUCCH PUSCH, SPS, TTI Bundling, and Uplink Power Control in compliance with 3GPP standards.
• Designed FSM-based control framework for interrupt handling and real-time task scheduling, achieving ~5 Mbps UL and ~10 Mbps DL per user while supporting 12,000+ concurrent users.

Reference Module (RM)Development

• Developed frequency tracking, time tracking, and delay spread estimation algorithms, improving PHY synchronization accuracy by ~95%.
• Contributed to overall PHY performance optimization, reducing channel estimation errors by ~20% in varying RF conditions.

L2 Layer Development – 5G NB-IoT

• Developed L2 user-plane MAC, RLC, and PDCP functionalities for a 5G NB-IoT project, achieving 100% protocol feature coverage as per project scope
• Implemented and validated procedures for PRACH, PUSCH, SPS, PHR, PDCCH, and PDSCH channels.

3GPP Standards & Protocol Knowledge

• Strong working knowledge of 3GPP specifications (Release 10–15) across PHY, MAC, RLC, PDCP, and RRC layers and experienced in translating 3GPP requirements into implementation and validation.

L1 FPGA Validation & Field Testing

• Performed lab validation and field testing (FT) for 4G LTE and 5G NB-IoT with BSNL, Jio, Airtel, and VI, achieving 100% end-to-end feature validation.
• Analyzed protocol traces and field logs to debug issues, ensuring system stability and feature compliance.

Low-Power Framework & Recovery Design

• Designed and implemented PHY Master Reset logic to gracefully reset RTL-PHY and recover from system-level failures.
• Enhanced robustness and recovery during critical fault scenarios.

L1 Architecture & Real-Time Systems

• Hands-on experience with L1 architecture, interrupt handling, real-time event scheduling, multi-core and multi-threading.
• Skilled in timing-critical embedded system design and optimization.

• Tracking modules implementation - SRA(Specification, Requirements and algorithm) designing for tracking modules including frequency tracking and delay spread estimation to enhance signal reliability. Designed and drafted algorithms for efficient frequency tracking and evaluated performance under varying channel conditions.
• Performance analysis - Conducted performance analysis of Rate Matching (RM) algorithms, including testing and MATLAB-based visualization comparing performance of MBIT UE's with other competitor devices improving performance to 97%.
• MATLAB simulation-Hands-on experience with MATLAB for algorithm simulation and Linux environments for system-level testing.

• GSM Module Interface - Worked on interfacing GSM module with microcontroller, data collection from sensors and uploading it in Client Server Communication IoT platforms
• 8051 microcontroller, ATmega328P and Communication Protocols - Real time monitoring of Water flow with 8051 microcontroller establishing communication with GSM module and communication protocols, helped in successful deployment of device across 25 places in Puducherry including schools and colleges to provide Water consumption report to Government