Mike Johns Email & Phone Number

Aurora, IL

Develop embedded software.

Schaumburg, Illionis

• Captured requirements, and led a small team in implementation and testing of an update to a C# PC application, which communicates with battery chargers for two-way radios. Worked with the charger developers to update.
• Wrote the host-DSP communication specification for a wearable speaker microphone for firefighting radios. Collaborated with an off-site DSP development team to resolve DSP software design issues.
• Captured requirements, architected, and led a small development team through design, coding, and testing of C code for a vehicular adapter for handheld police radios. Worked with business team and radio developers to.
• Architected, designed, and led small team in the implementation and testing of the DSP software for a wearable, noise cancelling speaker microphone for fire fighters. Developed the SPI-based inter-processor.
• Maintained & updated interface standard for communication between radio and accessory, working with stakeholders throughout the company. Reviewed updates to standards maintained by other teams.
• Created Python tool to allow audio engineers to update product tuning parameters in a speaker microphone, without writing code, using a textual description language.

Arlington Heights Illinois

• Developed microcontroller and DSP firmware for WiMAX wireless broadband base stations.
• Championed data link between DSP & FPGA in the 2nd generation WiMAX base station. Worked with a DSP vendor to develop a workable data link solution. Wrote C interface code for DSP & Host processor. Collected and.
• Developed test environment to assess performance of receiver processing in a WiMAX base station. Extended MATLAB simulator to generate test vectors for a new feature.
• Developed software service for precise scheduling of DSP processing in a WiMAX base station.
• Architecture analysis and processor selection for a WiMAX base station.
• Memory budgeting and memory analysis for design alternatives for a WiMAX base station. Identified and performed memory optimizations.

Schaumburg, Illinois

• Led team of two in design of forward error correction scheme (FEC) for two new voice modes for the iDEN cellular standard, for use in phones and base stations, using flexible rate convolutional codes developed by.
• Wrote assembly-language processing chain for voice and control data for the first iDEN phone: interleaving, scrambling, and CRC error checking, and integration of the convolutional error correction engine. Added.
• Wrote widely-used test software to measure end-to-end bit error rate on iDEN networks using an iDEN handset.
• Wrote the DSP bootloader for the first iDEN cellular handset and UNIX tools to optimize image.
• Wrote packet handling, and fragmentation and reassembly code, to handle UDP voice packets for a cellular transcoder with router-like capabilities. Created an automated regression test suite in Perl.
• Evaluated RTOS options for a new iDEN base station.

Schaumburg, Illinois

Designed and built breadboard prototype of board used in Digitial Signal Processor development setups.

Ms, Computer Engineering

Bs, Computer Engineering

Activities and Societies: Eta Kappa Nu - Electrical and Computer Engineering Honor Society, IEEE - Institute of Electrical and Electronics.