Zainab Ababri-Elahmadi

US Permanent Resident

4331 Woodcrest lane

Dallas, TX 75206

Cell: 469-226-5896; email: zainab_ababri@msn.com

 

OBJECTIVE        To obtain a position in Wireless Software Engineering or equivalent where my strong technical experience and analytical skills in System Testing, Digital Signal Processing, and Wireless Networking can be leveraged and further developed.

 

BACKGROUND Strong technical and analytical background in mathematics and signal processing coupled with excellent understanding and working, hands-on knowledge of various wireless communication systems such as LTE, CDMA2000 1xRTT/HRPD UMTS and GSM.

Excellent understanding of complex system design and optimization via Matlab simulations for the specification and optimization of all aspects of complex digital/mixed-signal systems.

Excellent knowledge of the OSI protocol stack

Strong background in system testing of WCDMA BTS, LTE eNB, Terminal (BlackBerry), CDMA2000 and WCDMA, GSM Core network.

 

 

WORK                BlackBerry, Irving, Texas

                             IOT Specialist

                             April 2013 to November 2013              

Responsible for executing Feature testing, Carrier testing, and 3GPP2, 3GPP, IMS standards based testing for device conformance.
Performed in-depth log analysis using Qualcomm QXDM in order to get the root cause of the issue and propose the adequate fix.

Responsible for troubleshooting issues seen on the field.

Responsible for LTE-CDMA IRAT testing and troubleshooting.

Created scripts for Verizon LTE stress test plan using Spirent CS8 Development library.
Hands on experience with various network emulators such as Spirent, Aeroflex, Comprion, CMW Rohde and Schwartz.

 

 

                             Nokia Siemens Networks, Irving, Texas

                             eNB Integration and Verification Engineer II

                             March 2009 to April 2013

                           Responsible for integration and verification testing of NSN eNodeB

Good technical knowledge of NSN system modules hardware

Entity verification planning including reviews/analysis of feature specifications, work estimations and investments.

Work with features designers to integrate new features to eNB.

Involved in new features specifications as eCSFB to CDMA2000 network.

                           Fault investigation/reporting which includes cooperation with other teams.

Work with IOT team on many features involving UE specific procedures as intra LTE cell reselection, inter-RAT idle mode mobility.

Work with LG G7/4, Samsung, Qualcomm, Aeroflex TM500 LTE UEs.

Test cases creation using Nethawk East tool.

Work with layers 2/3 LTE protocol stacks. MAC, RLC, PDCP, RRC

Work with LTE C-plane protocol stack (NAS, S1AP, X2AP)

 

 

ALCATEL-LUCENT, Plano,Texas

Next Generation Wireless Networking

Co-op - May 2006-April 2007

Responsible for compilation and execution of sanity and regressions tests of new software releases for Alcatel software based mobile switching system.  Performed trace and root-cause analysis to resolves various issues encountered during the testing process.  Collaborated with software development team to correct software bugs and improve the overall system robustness.  Researched and compiled a study on a new billing record database based on new specifications.  Created training material and conducted several internal seminars on the new billing system.

 

                             

                            Maroc Telecom, Morocco

                             QOS & Network Performance Engineer II - GSM Network

                             June 2003-February 2005

Responsible for supervising and maintaining Maroc Telecom’ 6 Million+ subscribers GSM network Quality of Service (QOS).  Performed call tracing and analysis and monitored all the network key performance indicators (KPI) using a multitude of tools such as Proscan, PROPERF, Metrica, and Tektronix K1205.  Established metrics and threshold ranges for the various network KPI and QOS parameters.  Responsible for the project of integrating the statistics related to the Intelligent network of Maroc Telecom.  Investigated origins of various QOS degradations and performed root-cause analysis that often required technical knowledge across many layers of the network.  Acted as key interface to key vendors to ensure their compliance with the network performance mandated in the prevailing RFQ/RFPs.  Detected the GSM network “black spots” – cells with high drop call rate, bad call establishment or unsuccessful handover – using Audilog’s “Metrica/NPR” software tool.  Proposed, simulated and documented optimum frequency utilization using CTS Network Planning & Optimization tool “Ellipse”.

 

EDUCATION        Masters of Science – Electrical Engineering

Digital Communications and Signal Processing

December 2008

THE UNIVERSITY OF TEXAS AT DALLAS

 

Bachelor of Science in Electrical Engineering and Telecom

(5-year degree)

June 2003

I.N.P.T, Rabat, Morocco – Morocco’s premiere Engineering School.  Accessible only to top 5% performers at entrance exam

 

 

PROJECTS           Developed and successfully tested a Matlab code that computes the generator matrix for a deterministic signal estimator. The algorithm is based on an innovative convex optimization technique that does not take into account the biasness of the linear estimator. The result is superior performance in the low SNR regime than the popular Least Square Estimator.

 

Developed, implemented and successfully tested a Matlab code to implement a Maximum Likelihood detector for an OFDM system where the signal was clipped to reduce the PAR (Peak to Average Ratio). For this end, a complete OFDM transceiver (DSP blocks) was implemented using Matlab.

 

Developed, implemented and successfully tested a Matlab and LABVIEW codes to implement a frequency, amplitude and phase estimator for a signal that is composed of an unknown number of sinusoids corrupted with white Gaussian noise. The frequencies are estimated using different approaches of Power Spectrum Estimation: AR modeling (Yule-Walker), MUSIC and ESPRIT. The amplitudes are computed with the Pisarenko Harmonic Decomposition. The phases are estimated using the Least Square Estimator. Project selected as “Best in class”.

 

 

Developed, implemented and successfully tested a Matlab and LABVIEW codes to implement a Head Pose Estimator in digital images. The technique that was used is based on extracting features from images and using neural networks to detect the face pose in each image.

 

COMPUTER    Operating Systems: UNIX, Windows 95, X-Windows, MS

SKILLS             DOS

                             Software: Matlab, C, LABVIEW, Excel, Access, Steleus, ProScan

                             and PROPERF tools for data queries, calls/ transactions

                             filtering tracing; Metrica performance management software Tektronix K1205.

                             Tools: Nethawk East for Call scenarios Test Cases creation, Rohde & Schwatrz

                             Signal generator, Sanjole Air interface sniffer.

 

STATUS                 US Permanent Resident (Citizenship application in process)

 

REFERENCES   Available in my LinkedIn webpage

 

LINKEDIN          http://www.linkedin.com/pub/zainab-ababri/0/ab3/66b

WEBPAGE