VisualCV

2G/3G Wireless System Architect - "Nokia Business Unit Architecture Department"

• Drove the first system integration of NOKIA 2G/3G modem with DigRF compliant RFICs.
  • Identified and synthetized feature and performance (RF & power) requirements of Nokia modem. From these requirements, defined a power efficient hardware and software architecture of the modem RF adaptation layer.
  • Coached SoC architects and platform validation team for the design of new IC features and associated test vectors relevant to the modem integration.
  • Originated the Nokia Baseband RF Interface Solution document. The control strategy and use cases defined were approved internally and externally by both Texas Instruments SoC architecture team, and Nokia Wireless Modem team. Now specifying the customization of this solution for Nokia chipset legacy/custom designs (Rapuyama).
  • Specified and led technically a 2G/3G modem prototype based on Nokia Wireless custom modem. This prototype developed externally to Texas Instruments' triggered the early development of Texas Instruments 2G/3G modem software abstraction layer. 350k USD budget granted to complete the FPGA based platform development.
• Owned the 2G/3G radio interface specification for Texas Instruments RF subsystem control (successively DRPu, Skyworks Helios 4 and Infineon SMARTiUE). Coordinated and reached technical consensus for the RFIC real time control requirements, and their implementation in the target radio transceivers. Was notably expatriated to Texas Instruments in San Diego 3G R&D center to drive this multi-site effort

• Stands for a customers' reference technical interface to capture, formalize and fulfill RF interfacing requirements from major platform customers and modem providers (Nokia Wireless Modem, Nokia Chipset, Motorola Personal Communication Systems).

Senior GSM/GPRS/EDGE Modem Architect - " 2G/3G System Architecture Department"

• Technically led a team of 3 modem architects in charge of the following objectives:
  
  • Capture and formalize Marketing, Customers and Cellular Networks Operators needs relevant to Texas Instruments modem.
  • Define with internal and external target customers the GSM/GPRS/EDGE modem requirements (hardware, physical layer and protocol stack software, baseband drivers). These requirements were then approved and fulfilled by software development, platform validation and verification teams.
  • Assess architecture impacts of 3GPP modem standards evolution on the full modem software stack.
  • Define GSM/GPRS/EDGE Modem Use cases and 'early' validation plan for critical field & GCF test cases .
  • Support customers and internal teams on platform maturity improvement and earliest productization.
• Drove technically the GSM/GPRS/EDGE modem power optimizations. Owned the architecture and completed 50% of the total power gain due to all power optimizations implemented in low/mid-end low cost platforms (DRX2 standby time, Single burst demodulation, Power measurement selective skip). They have been a key contribution to reaching customer power targets, which then requested the porting of all features on platforms already in maintenance phase.

• Developed proof of concepts from simulation to prototypes for modem key features. Exploratory features like GSM paging block decode on single burst and 32kHz XTAL removal were proven mature, and implemented on Texas Instruments low cost platforms.

• Pioneered the mixed hardware/software control of Texas Instruments integrated radio: Digital Radio Processor (DRP). Parallel definition of software and hardware architecture resulted in the platform 1st phone call in only 2 weeks / shortest time ever in the company chipset history.

• Was recognized as a significant contributor to Wireless Terminal Business Unit revenues, and appointed Member Group Technical Staff.

GSM/GPRS/EDGE Physical Layer Software Engineer - "Layer 1 Department"

• Developed embedded Layer 1 software on ARM7/C54x processors. Notably specified, designed, integrated and validated RF stage drivers, Layer 1 engineering mode and embedded calibration tools.

• Owned the platform time and frequency synchronization control loops (automatic frequency control, timing alignment, sleep clock gauging).

• Drastically reduced High Level OS platform (OMAP850) current drain through an optimal access control of modem/application software to embedded/external memory. Optimization yielded to more than 20% phone autonomy improvement.

• Key contributor to ‘ARM7/C54x based' programs ramp up and release to production (Calypso+, Calypso Lite, Syren, RITA).

• Recognized as key L1 software expert and appointed as Modem Lead in ‘Cellular Systems' architecture team.

Modem System Engineer - "Broadband Wireless Access department"

• Modeled and simulated modem physical layer performance- IEEE 802.16 standards (digital broadband modems).

• Validated modem physical layer performance from antenna to baseband modem.

Research RF Engineer - " RF Systems & Spectrum Engineering Lab"

• Modeled, analyzed radio interference use cases based on Monte Carlo custom simulation tool. Developed and patented counter measures to the various network coexistence issues identified (SEAMCAT).

• Developed a C++ based simulation platform tailored to 3G radio resources management optimization.

• Contributed and originated several patents and publications on positioning techniques, 3G handover process optimization, 3G compressed mode interference reductions.