Senior Staff Engineer

Charles C. Alleyne

**** *** ***** ****, *********, CA 92057

Mobile: 760-***-**** Email: *********@*****.***

Linkedin: https://www.linkedin.com/in/charles-alleyne-5044a43

Executive Career Summary:

A highly talented, experienced and driven Hands on Development Engineer with proven leadership skills with a tremendous background in Wireless, IP, Data, Audio, Software/Hardware design, Digital Signal Processing, Embedded design, Algorithm development, Object-Oriented design, Prototype to Implementation, Testing, International Integration, Quality control, Production releases, Release management, ISO 900x certification, and problem-solving, including root-cause analysis. I have over 20 years of experience in these domains as well as excellent design, debugging and communication skills with a broad system understanding of products. I am a firm believer in Quality of Design, design reviews, documentation and open team communications to meet the profit goals of the organization with reliable products to optimize their time-to-market potential. Also innovation in design to meet product roadmap goals, adherence to schedule, budgeting, team communication & team building.

Career Skills:

Experienced Development engineer and R&D member with a strong background in RF, IP, voice, data, digital signal processing, wireless systems and protocols, high-level as well as embedded and real-time software development and system design. Algorithm development using digital signal processing techniques & theory. TCP/IP protocol stack, Wireless standards and integration experience.

Logical analysis, thorough design and problem solving skills with a variety of development experience, customer interfacing, time-to-market optimization and prioritization of tasks.

Excellent Oral and Written Communication skills (Toastmasters, Microsoft Office Suite, Training)

Project management skills: Defining project requirements based on SOW and/or customer requirements. Prioritizing tasks and maintaining high quality of work with high reliability results.

Reverse Engineering Systems, designing systems, estimating and meeting budget requirements, defining part specifications, creating BOMs, defining product specifications based on customer requirements, strong adherence to quality in system and system/hardware/software design.

Ability to work independently or with all members of organization including international teams.

Experience with Programming in several languages(C, C++, C#, Assembly, DSP, RTOS, HLOS).

Digital Hardware design along with Fixed and Floating-point DSP development experience.

RF analysis experience with VoLTE, LTE, EVDO, CDMA, GSM, UMTS and HSPA using TEMS Discovery.

Extensive experience with ITU, ETSI, 3GPP and other international standard requirements.

TCP, UDP, HTTP, FTP, IPv4 &IPV6, ICMP, SIP, RTCP, DHCP, MTU, MSS, data throughput optimization.

Multi-Threaded, Embedded RTOS and Visual Studio .NET software architecture design experience.

Audio, voice, speech, signal processing, QOS, board bring-up, hardware debugging experience.

USB, Wireless Networks, IP, protocols, ITU/ETSI/3GPP recommendations, JTAG, ICE, Protocol & Logic Analyzers, High-Level Simulations, QPSK, QAM, FSK, Correlation, FFT, DFT, LMS, Kalman EQ filtering.

LTE, VoLTE, SIP, RF, EVDO, CDMA, GSM, UMTS, WiFi, Bluetooth, Firmware, Embedded, Wireless, Voice, VoIP, Data, POLQA(Perceptual Objective Listening Quality Assessment) and PEVQ (Perceptual Evaluation of Video Quality) knowledge and experience.

Communications theory, modulation techniques including (BPSK, QPSK, DPSK, QAM, FSK, GMSK), Forward error correction, OFDMA, Time-frequency concepts, FIR, IIR filtering, Discrete Fourier Transform.

SDLC - Waterfall, and Agile Development experience.

Education:

MSEE – Rensselaer Polytechnic Institute - Masters’ Thesis: A Kalman Filter Based Digital Communications Channel Equalizer

BSEE/CS – Princeton University (Combined EE & CS) Jr/Sr Independent Project: An Autonomous Microprocessor controlled Robot

Patent - "Time-Scale Modification of Speech Signals." Patent #: 5,216,744

Time Delineated Skills:

Skill

Experience

Wireline/PSTN/ISDN/ Telecommunications

15+ years

Wireless/RF/4G/3G/Heterogeneous networks

15 years

3GPP/TS Standards (L2/L3 protocol experience MAC/RLC/RRC}

10 years

LTE (Long Term Evolution)

4 years

UMTS/HSPA/GSM/EVDO/CDMA experience

8+ years

Digital Signal Processing (DSP)

15+ years

RF Analysis using TEMS Discovery

5 years

Data analysis using Wireshark

7 years

Algorithm Development

8+ years

Qualcomm ICD and QXDM Pro

4 years

VOLTE (Voice Over LTE)/ SIP/UDP/RTP

3 years

IP/TCP/HTTP/FTP/ICMP/DHCP experience

8 years

VOIP (Voice Over IP)

6 years

SIP (Session Initiation Protocol)

4 years

Voice/Audio/Speech (Quality MOS – PESQ, POLQA)

10 years

Video Quality (Jitter, buffering, pixelization)

2 years

C# programming

6 years

C++ programming

7 years

C programming

12 years

Assembly programming

7 years

Multi-threaded design (embedded & PC based)

7 years

Scripting(Visual scripting, Linux Command Line Interface)

4 years

Embedded Software Design

10 years

Hardware Design (Digital & Analog)

6 years

TTL, CMOS and analog circuitry design/debugging

5 years

Logic Analyzer, Oscilloscope, Network Analyzer usage

10+ years

Microsoft Visual Studio .NET development

15 years

Source Archiving (Sourcesafe, TFS, PVCS, Git, GitHub)

10+ years

Microsoft OS (Windows, Windows Server)

15+ Years

Linux/Unix OS (Redhat Linux. Debian, U-boot-up)

5 years

RTOS (Real Time Operating System)

10 years

Code Optimization (Cycle Timing, code review)

5 years

Matlab

4 years

Robotics (motor control, sensors – sonar – infrared)

4 years

Project Scheduling (GANT charts, resource allocation)

3 years

Management

5 years

Customer Interfacing & Support

15 years

International Collaboration

10 years

Design and Documentation

15+ years

Testing and Verification

10 years

System Integration

12+ years

Root Cause Analysis

10+ years

Microsoft Word, Excel, Powerpoint, Visio, Outlook

10+ years

Raspberry Pi (with Debian/Linux OS)

3 months

Xilinx Vivado FPGA experience/Xilinx FPGA Programming

3 months /1 year

Analog Devices VisualDSP++ experience

8 months

Professional Experience

5/2016 – 1/2017 VULCAN Wireless, Inc. (Develops Software Defined Radios) Carlsbad, CA

Lead Senior Software Engineer

Led software team in the development of a software defined radio for secure military communications over a geosynchronous-orbit satellite link (MUOS).

Involved in the integration of DSP-to-FPGA communications, utilized Vivado to create basic FPGA design & Xilinx SDK to create Board Support Package using Linux UBoot, performed design reviews of hardware to resolve embedded software design issues, created Gant schedule for project development plan.

Worked with SPI, Flash, JTAG, ICE, Spectrum Analyzer, Signal Generator, Logic Analyzer, Oscilloscope and other tools to diagnose issues during development of the wireless system.

Utilized Analog Devices VisualDSP++, Linux, and Green Hills development platform for system development.

Analyzed embedded system and prepared design document detailing the major components in the system including memory interfaces and timing, Physical Layer Mod., RF Control & Wireless Protocol.

Used knowledge of hardware and software to find issues in system that led to successful software development on embedded platform.

Involved in the Physical Layer integration of wireless software into a multicore DSP using a Real-Time, Multi-threaded operating system using C and C++.

Used Linux Command Line Interface (CLI: ifconfig, top, ls, man, free, sudo apt-get, df, grep, iwconfig )

Worked on Linux Kernel Boot-Up Process with U-Boot and loading of device drivers for SPI, UART, etc. {boot.elf, devicetree.dtb, uImage, etc.}

Conducted Scrum Meetings to gauge development progress of multidisciplinary team members.

1/2009 – 2/2016 ASCOM NETWORK TESTING (Develops Wireless Network Test Equipment) Irvine, CA

Senior Staff Engineer

Resolved complex engineering issues worldwide that led to increased revenue growth.

Played key role in the design of wireless benchmarking equipment for major wireless carriers (Verizon/AT&T) and analysis of data, video and voice on these networks.

Performed VoLTE, LTE, HSPA, UMTS, EVDO, CDMA and GSM system performance analysis using TEMS Discovery.

Prepared White Papers explaining the operation of VOLTE, SIP, LTE, IP and Data Technologies.

Researched 3GPP, ETSI and ITU specs to determine the specifications for RSRP, RSRQ, RRC connection and disconnection methodologies, VOLTE/SIP call processing protocol, ISUP transactions, RTP speech transfer, dormancy timer operation, modulation methodology (QPSK, 16 or 64 QAM), and a myriad of other specifications used to determine the proper operation of the wireless system.

Performed Voice Quality of Service (QOS) using PESQ and POLQA. Wrote C# and C++ applications that utilized the various third party provided dlls (PESQ, POLQA, Squad) and produced design documents detailing the operation of the systems.

Authored papers explaining operation of products, LTE communication protocol, TCP optimization, HTTP transfer & speech recognition using normalized covariance.

Conducted webinars and live training sessions for international staff on hardware, software, system, scripting and trouble-shooting of products.

Used Android to communicate and control Android based Smartphones

Used Qualcomm ICD to control Smartphones with Qualcomm chips to analyze Layer 3 and Layer 2 parameters (LTE RSRP, LTE RSRQ, SIP messages, NAS, MIMO antenna levels, etc.)

12/2006 – Present RenuNergy (Researches Renewable Energy Alternatives) Oceanside, CA

Owner/Founder

Researched and developed Instantaneous Hydrogen Production Fuel Cell for improved gas mileage in vehicles

Researched and developed Vertical Wind Turbines for residential use

Produced 176 VDC grid charger converting a Gasoline-Electric Hybrid into a Plug-In Hybrid

7/2001 – 1/2009 COMARCO WIRELESS (Develops Wireless Network Test Equipment) Lake Forest, CA

Senior Staff Engineer

Project Manager for Land based MOS measurement system.

Produced BOMs, Installation, trouble-shooting and operational documents, used ORCAD to update schematics and worked with manufacturing to resolve production issues.

Prepared development plan to schedule the DSP software development & test processes.

Worked with international teams to integrate system for world-wide use.

Created documents detailing the design of the DSP software and the system architecture.

Reduced cost of product by 30% & redesigned hardware to increase performance 100%.

Successfully integrated a Voice over IP compliant MOS measurement algorithm (Squad) in a wireless network benchmarking system using a floating-point TI DSP.

Developed a multi-threaded architecture to optimize the performance of the DSP with the CPU intensive algorithms.

Developed and implemented a Normalized Covariance algorithm for the detection of speech over wireline and wireless links.

Conducted PC-based simulations with the algorithms to verify hardware implementation.

6/1999 – 7/2001 AMERITEC CORPORATION (Develops Wireless Network Test Equipment) Carlsbad, CA

Engineering Product Manager/Embedded Systems Manager

Led a team of HW & SW Engineers in the development of a SIP based VoIP call generator.

Created system design specification, GANT scheduling, marketing interface, software stack investigation and development system procurement.

RTOS, embedded, multi-threaded environment running on the MPC860 was utilized.

Conducted design review meetings and coordinated training of staff members.

Conducted interviews and hired skilled staff members.

Solicited consultants and prepared SOWs for desired tasks.

Embedded Systems manager responsible for engineering activities in wireless test systems division where we developed an autonomous wireless test system using Oracle DB.

Produced development scheduling, engineering and manufacturing coordination, software archiving, hardware review and verification.

Demonstrated product to domestic and international customers and solved technical customer issues.

10/1995 – 6/1999 NUERA COMMUNICATIONS INC. (Develops Wireline Access Eq.) San Diego, CA

Member Technical Staff II (Co-Founder: 1 of 61)

TDM Products Software Core Team Leader overseeing Time-Division Multiple Access product software.

Established the transfer syntax guidelines for incorporating voice compression algorithms into the Frame Relay Forum FRF.11 Implementation Agreement.

Authored papers detailing the use of ITU G.728(LD-CELP) and ITU G.729 algorithms for VoFrameRelay

Developed a Portable Voice Module used in voice over frame relay access products.

Designed and Developed a Neural Network based Speech Activity detection algorithm.

Interfaced with OEM customers to integrate voice/fax software into their systems.

Analyzed TMS320C6X 1600 MIPs DSP for real-time performance and code space increase over C5X ITU G.729 (CS-ACELP) 'C' compilation for C6X and comparative analysis of DSVD vs G.729.

Created a method for auto-initializing embedded code variables based on a novel approach.

8/1992 – 10/1995 PACIFIC COMMUNICATIONS SCIENCES, INC. (Wireless & Wireline) San Diego, CA

Member Technical Staff

Developed DSP algorithms using the TI TMS320C5X for the CDPD subscriber unit.

Software development included GMSK modulation and demodulation, media-access & physical layer protocols and Reed-Solomon encoding/decoding for the subscriber/mobile unit.

Developed S/W for receiver sample timing synchronizing and symbol-error rate performance.

Performed extensive work on a Frequency based Echo cancellation and Non-Linear Processing algorithms to remove any residual noise not removed by the LMS based FFT cancellation algorithm.

5/1990 – 7/1992 TELECO OILFIELD SERVICES (Develops Oil Field Service Equipment) Meriden, CT

Senior Software Engineer

Developed a revolutionary communications system for measurement-while-drilling devices using acoustic telemetry.

Researched channel characterization algorithms and developed Matlab simulations of QPSK and FSK communications systems for optimum transmission rates using digital signal processing.

Developed LMS and Fast-Kalman equalization algorithms for phase-coherent demodulation and a M-ary FSK modulator and sliding FFT demodulator for non-phase coherent system.

Worked with Patent attorneys to define and submit applications for a number of patents.

8/1986 – 5/1990 DICTAPHONE CORP. (Develops Dictation Equipment) Stratford, CT

Development Engineer

Received a patent for the time-scale modification of speech a year after joining company.

Reduced the cost of implementation from $300/channel to $15/Channel for speech playback speed control while maintaining pitch period of speaker.

Implemented a speech recognition dictation system using the Kurzweil voice recognizer, specially designed language models and the Dictaphone dictation system six months after joining company.

Designed, implemented and programmed an autocorrelation based VOX, a sampling rate conversion process, a frequency shifting process using complex demodulation, time-scale modification of speech, 32 Kbit/s ADPCM, adaptive VOXs, time & frequency-domain based pitch detectors and adaptive noise cancellation algorithms using C simulations and then on an embedded RTOS.

Education / Training

LTE TECHNOLOGY TRAINING COURSE

TEMS DISCOVERY RF POST PROCESSING TOOL

MICROSOFT TEAM FOUNDATION SERVER

PROJECT MANAGEMENT COURSE

C# .NET PROGRAMMING COURSE

A PLETHORA OF IEEE SEMINARS ON Various TOPICS

INTERNET COMM THEORY AND APPLIC COURSE

Association

IEEE Member

Princeton Club of San Diego

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