Drove u-blox Cellular IoT product excellence to global customer base (Asia, Europe, North America) through customer engagement on SARA-R410M, Qualcomm MDM9206-based LTE Cat-M1 for HW and SW modules, including issues on output power level, network connectivity, GNSS, TCP socket, and FTP service, etc.• Characterized Tx output power spectrum and Rx sensitivity thru R&S CMW500 on returned modules.• Diagnosed RAM-Dump log files with QXDM+QPST and Wireshark on customer connectivity issues.• Custom-built AT commands test scripts (Tera Term) for customers as troubleshooting aid for problems occurred in the field. Attained AT commands fluency as diagnostic tools to troubleshoot EPS network registration, TCP socket, FTP service, and u-blox exclusive uFOTA (Firmware over the air).• Assisted customers with schematic and layout designs thru internal R&D module integration guidelines. • Built task-specific Test Fixtures to assist in-house module development for local SW and Test teams.• Designed and developed with Ingenu Team and ODM in China u-blox exclusive IoT module based on Ingenu RPMA (random-phase multiple access) technology, overseeing schematic, layout, and production.• RF-optimized Rx sensitivity (-108 dBm) and Tx power (+24 dBm) on legacy CDMA450 IoT module.

Aligned customers on presale engagements to secure design wins, and post-sale technical application support on Intel 6260-based modem module partners for IoT/M2M design applications (utility meter, health monitor)• Won medication monitoring device, an M2M design win from Proteus to use Intel 6260-based modem.• Supported R&D XMM modem team and modem module customers including non-mainstream customized application for the IoT/M2M customers, such as Proteus, Sierra Wireless.• Implemented test scripts to automate current and energy consumption data for FTP and HTTP connectivity on Telit HE910 module for data packets upload (CSD and PSD) over various payload sizes and data rates.• Analyzed and documented various energy use case solutions to support customers in making design trade-offs and maximizing battery life span critical in IoT/M2M field usage modes. • Created unique hands-on measurement profiles that became key assets for other teams to adapt Intel modem technology for IoT/M2M applications and SoC integration. Generated design guides to support customers. • Manipulated fluently with AT commands set on Intel 6260-based modem for SW coding and control.

Customer Support Engineering Group that provided technical support on UMTS RF engine platform, transceiver implementation and PCB layout along with RFIC register-based software support to customers.• Reduced design turn-around time for customers using Infineon optimized engine platform, and provided on-site or off-site technical support plus customer training on Infineon products.• Engaged in lab bench automated performance measurement on Infineon 5701 SMARTi RF engine platform to support the R&D team at Munich, Germany.• Experienced and familiar with many Rohde&Schwarz lab equipment, such as CMW500 (Radio Comm Tester), SMU200A (Vector Signal Generator), and FSQ8 (Signal Analyzer).

Wireless RF HW Engine Design Group. Engaged in RF Front-end design on a direct-conversion based PCS receiver with Nokia-designed RF chipsets.• Designed and implemented the PCS receive chain to satisfy Nokia internal RF HW targets. Tasks were to design matching components, evaluate critical filters, and PCB components layout.• Previous projects involved design and verification of dual-band tri-mode CDMA/AMPS phones based on super-heterodyned transceivers also with internal Nokia RF chipsets.• Optimized and balanced system-level RF parameters: sensitivity, single-tone desensitization, and inter-modulation distortion, involving integration among HW components, DSP SW, and phone tuning teams.• Held periodic milestone Test Results Reviews – organizing extensive test plans and presention on phone RF performance results over external voltage and temperature variations.• Provided proto build supports in troubleshooting defective phones. In addition, documented both system and component levels troubleshooting guides for service technicians.

Wireless Engineering Division, Digital Cellular Transceiver RF Design Group. Engaged in a TDMA PCS1900 dual bands tri-mode cellular phone project.• Previously worked on an on-going TDMA cellular phone project: designed and tested shielding enclosure to pass radiated emission test for EMC and FCC compliance.• Automated SINAD, BER, ACPR, and EVM tests on HP8920B for quick validation, and performed parametric testing according to CTIA Certification Test Plan.