Mohsen Sarraf, Ph.D.

Mohsen Sarraf Headshot
Senior Lecturer
Visiting Assistant Professor, Electrical Engineering

Computer Engineering and Computer Science Department
Tagliatela College of Engineering

July 1986

Ph.D. in Electrical Engineering; University of Southern California.

Computer Networks and Communications.

August 1981

Master of Science in Electrical Engineering; University of Southern California.

June 1980

Bachelor of Science in Electrical Engineering; University of Southern California.

About Mohsen

Deep understanding and experience in Communications theory and practice, Performance Analysis, and Multimedia theory and applications (Speech, Audio, Video). Many years of experience in simulation, both with tools (e.g., Matlab) and by programming in C. Extensive experience in real-time programming, in C as well as in embedded languages. Extensive experience in hardware design and implementation of real time systems. RF planning. Knowledge of Object-Oriented programming and C++. Experienced in all Microsoft business software tools; e.g., Excel, MS Project, Power Point, and Word. Experience with Microsoft Windows and UNIX environments. Years of project management, people management, and overall oversight of an R&D organization including budget responsibilities. Deep understanding and experience with Stochastic processes both in continuous and discrete time domains, Probability Theory, Statistics, Quantitative Analysis, Queueing Analysis, Speech, Audio, and Video coding techniques. Also familiar with many commercial and Military standards from wired to wireless to multimedia applications. OPNET. ProLab.


Twenty Two US patents issued

"Watermarking Scheme for Digital Video", issued Mar. 4, 2014, U.S. Patent Number 8666108.

"Method and Apparatus for Multi-Stream Transmission with Time and Frequency Diversity in an Orthogonal Frequency Division Multiplexing (OFDM) Communication System", issued July 5, 2011, U.S. Patent Number 7974255.

"Methods and Devices for Randomizing Burst Errors", issued Jan. 11, 2011, U.S. Patent Number 7870462.

"Access Scheme for a Data Communications Network", issued on Nov. 30, 1993, U.S. Patent Number 5267243.

"Method and Apparatus for Reducing Error in Recovering Information Bits in a Wireless System", issued on May 23, 2000, U.S. Patent Number 6067295.

"Frequency Offset Estimation for Wireless Systems Based on Channel Impulse Response", issued on Aug 1, 2000, U.S. Patent Number 6097770.

"Time Division Multiplexed Transmission of OFDM Symbols", issued on Feb. 12, 2002, U.S. Patent Number 6347071.

"OFDM subcarrier hopping in a multi service OFDM system", issued on April 23, 2002, U.S. Patent Number 6377566.

"Method and Apparatus for Estimating Power of First Adjacent Analog FM Interference in an In-Band On-Channel (IBOC) Communication System", issued Sept. 3, 2002, U.S. Patent Number 6445693.

"Method and Apparatus for Sampling Timing Adjustment and Frequency Offset Compensation", issued May 20, 2003, U.S. Patent Number 6567480.

"Method and Apparatus for Frequency Offset Compensation", issued July 8, 2003, U.S. Patent Number 6590945.

"Method and Receiver for Dynamically Compensating for Interference to a Frequency Division Multiplex Signal", issued Aug. 5, 2003, U.S. Patent Number 6603826.

"Asymmetric Pulse Amplitude Modulation Transmission of Multi-Stream Data Embedded in a Hybrid IBOC Channel", issued Nov. 18, 2003, U.S. Patent Number 6650717.

"Sample Timing Control for Demodulation of Phase-Modulated Signals", issued Dec. 16, 2003, U.S. Patent Number 6665356.

"Delay-Locked Admission Control Scheme in Communications Networks", issued Feb. 3, 2004, U.S. Patent Number 6687223.

"Interleaver Scheme in an OFDM System with Multiple-Stream Data Sources", issued Jun. 8, 2004, U.S. Patent Number 6747948.

"Method and apparatus for post-detection maximum ratio combining with antenna diversity in an orthogonal frequency division multiplexing (OFDM) communication system", issued JAN. 11, 2005, U.S. Patent Number 6842421.

"Frame Synchronization of an OFDM Signal", issued Aug. 9, 2005, U.S. Patent Number 6928046.

"Differential Dense Wavelength Division Multiplexing (DDWDM) in Optical Systems", issued July 4, 2006, U.S Patent Number 7072592.

"Methods and Devices for Randomizing Burst Errors", issued Jun. 5, 2007, U.S. Patent Number 7228486.

"Method and Devices for Decoding Signals Containing Noise and Distortion", issued April 15, 2008, U.S. Patent Number 7359446.

"Technique to Decrease Signal Amplitude Peak-to-Average Ratio in a Wireless Communications System", issued Jun., 2, 2009, U.S. Patent Number 7542736.

Three European Patents issued

"Sample timing control for demodulation of phase-modulated signals", issued on Aug. 8, 2000, Patent number 00304656.2-2216.

"Differential dense wavelength division multiplexing (DDWDM) in optical systems", issued on May 9, 2001, Patent number 01310123.3-****.

"Apparatus and method to decrease signal amplitude peak-to-average ratio in a wireless communications system", issued Sep. 9, 2006, Patent Number 06117869.5-.

Five US patents are pending

Published Books

"W-CDMA, cdma2000 and 3G Mobile Networks", co-authored with M.R. Karim, published by McGraw Hill, April 2002. ISBN # 0-07-138513-4.

This book gets into medium level detail on all aspects of the third generation cellular communications. It is intended for patent attorneys, engineers and software developers who are assigned to 3G projects, and graduate students who want to learn the breadth of the subject as well as some detail and further leads for deeper details. 

This Book has been translated and published by McGraw-Hill in Chinese:

"W-CDMA, cdma2000 and 3G Mobile Networks", co-authored with M.R. Karim, published by McGraw Hill, In Chinese, 2003. ISBN # 7-115-11441-2/TN.2107.

See More See Less

[1] "A Low Computational Complexity Statistical Discrimination Algorithm for Collision Detection in Wireless Sensor Networks", IAENG International Journal of Computer Science, Volume 41 Issue 3, Pages 204-211, with co-authors.

[2] " Efficient Power Saving Algorithm to Detect Collision Based on Statistics of Received Packets in Wireless Sensor Networks", Proceedings of the 2014 International Conference of Wireless Networks (ICWN'14), London, UK, July 2-4 2014, with co-authors. 

[3] "A Novel Scheme for Power Saving in Wireless Sensor Networks With Packet Collision", Proceedings of the 15th annual IEEE Wireless and Microwave Technology Conference (WAMICON 2014), Tampa, Florida, June 6th 2014,  with co-authors.

[4] "A Novel Collision Detection Scheme for Wireless Sensor Networks using Received Signal Dynamic Range Statistics", Proceedings of the 23rd Wireless and Optical Communication Conference (WOCC 2014), NJIT, Newark, New Jersey, May 9-10 2014, with co-authors.

[5] "Power Saving and Throughput Analysis of a Novel MAC Algorithm in WSN", Proceedings of IEEE Second International Conference on Future Generation Communication Technologies – FGCT 2013, London, UK, Dec. 12, 2013, with co-authors.

[6] "Rapid Test and Evaluation Platforms for End-to-end Voice and Video Applications over Tactical Radios and Networks", Proceedings of IEEE Milcom 2012, Orlando, Fl., Oct. 29, 2012, with co-authors.

[7] "Floor Control for PTT Voice Communication in a Hybrid MANET Tactical Environment", Proceedings of IEEE Milcom 2011, Baltimore, MD, Nov. 7, 2011, with co-authors.

[8] "Signaling Message Performance for Packetized Voice Systems in a Mobile Ad Hoc Network (MANET) Environment", Proceedings of Milcomm 2010, San Jose, CA., Oct. 31, 2010, With Co-authors.

[9] "MANET Compensation/Packet Loss Concealment (MC/PLC) Implementation for Packet-Based Military Voice Communications", Proceedings of Milcomm 2010, San Jose, CA., Oct. 31, 2010, With Co-authors.

[10] "Mitigating Effects of Packet Jitter on Military Tactical Voice Quality in the Presence of Packet Loss and Background Noise", Proceedings of Milcomm 2010, San Jose, CA., Oct. 31, 2010, With Co-authors. 

[11] "Performance Analysis of Packet Loss Concealment in Mobile Environments with a Two-State Loss Model", Proceedings of IEEE-CQR 2010, Vancouver, BC, Canada, June 2010, with Co-athors.

 [12] "An Automated VoIP Quality of Service Performance Assessment Platform and Results for the Tactical Combat Environment ", Proceedings of Milcomm 2008, San Diego, CA., Nov. 2008, With Co-authors.

[13] "Speech Intelligibility and VoIP Voice Quality Correlation in the Future Tactical Communications Environment", Proceedings of Milcomm 2008, San Diego, CA., Nov. 2008, With Co-authors.

[14]  "An OFDM All Digital In-Band On-Channel (IBOC) AM and FM Radio Solution Using the PAC Encoder" IEEE Transactions on Broadcasting, March 1998, Vol. 44, No. 1 p. 22 ff. With R.L.Cupo, M. Shariat, M. Zarrabizadeh.

[15]  "Frequency Offset Estimation in Frequency Selective Fading Channels", Proceedings of SPAWC 97, Paris, France, April 1997. With A.R.S. Bahai.

[16]  "A Frequency Offset Estimation Technique for Nonstationary Channels", Proceedings of ICASSP 97, Munich, Germany, April 1997. With A.R.S. Bahai.

[17]  "A Frequency Offset Estimation Technique for Wireless Channels", Proceedings of VTC 97, Phoenix, AZ, May 1997. With A.R.S. Bahai. 

[18] "A Hueristic for Approximating the Traveling Salesperson Problem", Proceedings of SISCAP, February 1994, Mayaguez, Puerto Rico. 

[19]  "Build Out Delay in the Receiver Buffer of a Video Compression System (HDTV)", First International Conf. on Comp. Comm. and Networks, June 1992, San Diego, Calif. With D. Lucantoni, and A.F. Faryar.

[20]  "Optimum Packet Length in a Fading Channel Environment Along with Random Bit Errors and Finite Buffer Size", First International Conf. on Comp. Comm. and Networks, June 1992, San Diego, Calif.

[21]  "Internal Traffic Characterization of a Multi-Stage ATM Switch", Submitted to Computer Networks and ISDN Systems Journal, with T.C. Hou. 

[22]  "On Various Modifications of the PARS Random Access Scheme", Proceedings of IEEE Globecom, December 1991, Phoenix, AZ.

[23]  "PreAssigned Retransmission Slots Multiple Access Scheme (PARS)", Proceedings of IEEE Infocom, April 1991, Bal Harbor, Fl.

[24]  "Effect of Slot Size on TDM Performance in Presence of per Slot Overhead", Proceedings of Globecom '89, Nov. 1989, Dallas, TX.

[25]  "Queueing Time for the Outbound Call Management System", Proceedings of Globecom '89, Nov. 1989, Dallas, TX.

[26]  "Performance Analysis of the Outbound Call Management System", Proceedings of IEEE Infocom, April 1989, Ottawa, Canada.

[27]  "An Adaptive Multiple Access Strategy for a Channel with Power Capture", Proceedings of IEEE ICC, June 1986. With V.O.K. Li.

[28]  "Carrier-Sense Multiple Access with Fixed Retransmission Assignment", Proceedings of IEEE Globecom, December 1986. With V.O.K. Li.

[29]  "A Stable Multiple Access Scheme for Satellite Communications Networks", Proceedings of IEEE Infocom, April 1986, Bal Harbor, Fl. With V.O.K. Li.

Also authored or co-authored numerous internal (Bell Labs, Telcordia) technical memoranda and engineer’s notes.

One transaction papers being prepared in communication theory and applications.

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