SUMMARY:

• Technologist with 20+ years of cumulative domain knowledge in wireless, broadcast and information systems.
• Expertise on various secured digital transmission designs and wireless standards for satellites, wireless receivers, customer premise equipment and ground stations covering physical, link and IP layers including antenna(s), RF front - end to baseband electronics covering key signal processing components of modem/codec, link layer encryption, multiple access, packet scheduler/dynamic resource allocation and upper layer security protocols.
• Experience in business requirements, systems engineering, architectural analysis, integration, lab/field testing, configuration management, flow-down and traceability from product/market requirements through system to subsystem SW/HW/FW specs, use case description, risk/performance analysis and architectural trades of end-to-end system.

TECHNICAL SKILLS:

Tools: MS OFFICE, WINDOWS, LINUX, VISIO, DOORS, JAMA, JIRA, VERSION ONE, CONFLUENCE, UML/SYSML/EA, MATLAB, C/C++, OPNET/QUALNET, SAT/STK, SCOPES, SPECTRUM/NET ANALYSER, WIRESHARK

JOB EXPERIENCE:

SYSTEM ARCHITECT

Confidential

Responsibilities:

• System architect for inflight entertainment (IFE) delivering audio/video contents via wired and wireless services
• Modeling and simulation of IFE network architecture and its effects on video/audio performance.
• Optimize Gigabit Ethernet cabin wired network design for video/audio services
• Revew Ka/Ku-band GX satcom system requirements for Internet connectivity to ground
• Analyze RF transmission and interference for Lab environment, inflight operation and Government filings
• Document security compliance to Airbus SAL0 and draft architectural white paper SMDP and vulnerability DTCAR and CVAR

SYSTEMS ENGINEER/CONSULTANT

Confidential

Responsibilities:

• Consultant and tech lead of Confidential and on various live, VOD, PPV video broadcasting projects
• Write architecture white paper and functional spec for STB and mobile platforms based on business rules/requirements
• Conduct preliminary and critical design review as major project milestones for system/product requirements selloff
• Support pre-launch integration/testing/debugging and post-launch trouble-shooting
• Provide system engineering services to various projects with emphasis on digital right management (DRM): AVANT, Ka-band GX/HBCS/WCD, C3, Octoshape CDN, Adobe Prime Time, 64-bit Mobile/Web App, HR44 Transcoding, Smart Push, DSWM-LNB, MOCA, DRE, TV App, L2TP to SSL, AMS, Nomad/Genie-Go, Connect Now DMS, HDMI CEC

ENGINEER

Confidential

Responsibilities:

• Simulation with delay and jitter model of the MAC and PHY layer modeling as described in the Confidential standard
• Investigated other existing wireless designs including WiFi, WiMAX, Confidential, WCDMA and LTE for physical, link and network layers in supporting future DOD test range requirements of Telemetry and Command data services
• Tradeoff analysis between options of semi-custom versus COTS router/switch for Confidential RAN in providing Confidential data flow with differentiated quality of service (QoS) for specific mixture of traffic classes
• Formulated security implementation options of Link layer encryption based on Confidential FIPS-140 guideline
• Coordinated with test range frequency/spectrum manager in site survey, setting spectral mask and channelization scheme to ensure Confidential emission stay within the allocated band for telemetry data
• Supported customer in source selection of vendors to build Confidential Radios within the size, weight and power constraints
• Flowed down of system requirements to the radio modem/codec and complete with traceability, testing and verification
• Reviewed and analyzed requirements of satellite payload packet switching capacity, comm. data loading capacity and requirements allocation for IP routing on multi-beam antenna for Earth coverage
• Analyze various optical cross link designs
• Delivered Use Case on dynamic resource allocation operation under Jamming/Interference
• Supported development, marketing and demo of jitter and delay simulation of Confidential satellite IP data network performance for both internal and external customers
• Matlab modeling of eXconnect System of forward link ( Confidential ) from Hub via bent-pipe fixed satellite to airline and return link.
• Google map overlay on coverage of flight paths

ENGINEERING CONSULTANT

Confidential

Responsibilities:

• Analyzed radio architecture covering modem abstraction layer and crypto subsystems design
• Integration and test of end-to-end data and comm. network connectivity of prototype radio
• Conducted RF PA spectral analysis for inter-mod interference and ramp-up timing in the VHF/UHF band
• Compiled link budgeting including effects of co-site interference, multipath, interference and antenna beam coverage
• Reviewed WF performance and component interface specs (ICDs) plus requirements traceability and verification (VCRM)
• Defined network management interfaces among JWNM, FCS NMS and SRW NM
• Established technical performance metrics (TPMs) for senior program managers to monitor weekly progress and to report monthly status
• Oversaw the development and deliverables of the Comm Effect Server ( Confidential ) for large scale sensor and comm. data network traffic simulation (>1000 nodes)
• Wrote request for proposal (RFP) and contracting for SW deliverables in building a large scale tactical network simulation
• Oversaw testing of various versions of SW deliverable
• Analyzed software architecture of mobile ad hoc network with nodes of surrogate JTRS radios with messaging delays/jitter modeled by Confidential
• Formulated enterprise service bus approach for battlefield management from backend supply chain to frontend battlefield in a service oriented architecture (SOA) - creating an integrated operational network simulation (IONS)
• Characterized channel model of double canopy foliage, fading/multipath in clear or rain with spatial/temporal characteristics of the background noise unique in the UHF band
• Performance analysis of Link layer retransmission (ARQ) for improving availability under channel impairments
• Tradeoff between FDMA and Confidential approaches for scattered narrow band spectrum
• Compiled link budget of various terminals under worst case and nominal operation scenarios
• Analysis of capacity related requirements under various channel conditions
• Negotiated with HNS on requirement verification method

Senior Systems Architect

Confidential

Responsibilities:

• Designed and prototyped commercial Confidential wireless products targeting LMDS and MMDS WLAN market
• System architect for multi-channel Confidential subscriber equipment and base-station units integrating, antennas, RF MMIC and digital ASIC containing the BPSK, QPSK, 16-QAM modem and convolutional code codec
• Conducted signal propagation and frequency channel interference analyses followed by field testing of transceivers in Long Beach and other cities to collect real performance data.
• Led systems engineering effort in GMSK XDR modem and turbo code performance simulation and analysis
• Investigated traffic loading with various terminals supporting mixture of voice, video, VTC and data transmissions under an Army furnished battlefield scenario
• Compared performance between circuit and IP packet switching scheme for the AEHF satellite payload
• Supported various design reviews for customer and stake-holders
• Assisted new business development leveraging on internal IR&D programs conducted at HSC and HRL

Cognizant Design Engineer

Confidential, Pasadena, CA

Responsibilities:

• Responsible for telemetry and command data delivery via satellite links and worldwide terrestrial network for Confidential near-Earth and deep-space missions
• Supported new technology insertion of space/ground equipment via participation in the design, implementation, test plan, data collection and post-test reporting
• Developed RF and Optical satellite link budget template for Confidential satellite missions
• Investigated antenna/feed and pointing schemes (conscan and monopulse) and their sensitivity to wind and rain at various EL and AZ angles
• Author/owner of telemetry section of the Confidential DSN 810-5 document
• Led windows based software development - Signal Analysis Tool (SAT) on satellite spectrum analysis, RFI and telecom link budgets to support Confidential and Confidential spectrum filing
• Conducted global coverage interference analysis of commercial SATCOM proposal