Trevor N. Yensen, Ph.D.

Career Interests

Digital Signal Processing (DSP)

• Filter Design/Implementation (FIR, IIR)
• Hard/Soft Viterbi Decoding
• Microphone Array Beamforming
• Noise Reduction Algorithms

DSP/MCU Hardware Programming

• Texas Instruments TMS320C54x, TMS320C6x
• Data Acquisition
• ARC Cores
• Motorola MC68HC11, MC68HC08

Networks

• Internet Protocols (TCP, UDP, IP)
• ATM AAL1, AAL5
• Telephone Networks (Call Waiting, Caller ID, FSK Modems)

Operating Systems

Programming

• Visual C/C++
• GNU C/C++
• TCL, MATLab
• 80x86 Assembly Language with MMX

Psychoacoustic Test and Measurement

• TDT RP2 Programming

Real-Time Programming

Speech Coding

• Linear Predictive Coding (LPC)
• Algebraic Code Excited Linear Prediction (ACELP)
• mu/A-Law Coding (G.711)
• Voice Activity Detection (VAD)

Speech Recognition

• Codebook Algorithms
• Classification Algorithms (k-Nearest Neighbours)
• Hidden Markov Models (HMM)

Wireless Communication

• Orthogonal Frequency Divisive Multiplexing (OFDM)
• GPS Radio

Adaptive Signal Processing

• Acoustic/Network Echo Cancellation

Voice Over Internet Protocol (VoIP)

• ITU-T H.323
• IETF Session Initiation Protocol (SIP)
• IETF Real-Time Transfer Protocol (RTP and RTCP)

Recent work

IceFyre Semiconductor

• System Simulation for 802.11a Wireless LAN Chip
• 802.11a Chip Performance Analysis
• Algorithm Development (Patent Pending)

Solicitor General of Canada

• DSP-Based Prototype Development

Catena Networks

• Software/Hardware Verification Testing for VoIP System

SiGEM

• Fixed-Point DSP Implementation for Satellite Comm. System

Carleton University Institute for Neurosciences

• System Development for Behavioural Research
• Hardware Design and Implementation

Sedona Networks

• Algorithm Development and Evaluation

Research Assistant/Teaching Assistant (1996-2001)
Carleton University – Systems and Computer Eng.

• Researched Voice Over Internet Protocol (VoIP) front-ends
• Digital Signal Processing (DSP) algorithm design and implementation
• RTP/ITU-T H.225.0 stack development for PC/DSP VoIP platform
• Supervise Co-op Student Research

DSP Engineer (1996)
Nortel – Audio and Display Research

• Designed and implemented a hands-free telephone set test bed for acoustic echo canceller performance evaluation
• Digital Signal Processing (DSP) algorithm experience

Lab Consultant/Research Assistant
Carleton University - Systems and Computer Eng.

• Data acquisition software design using NI-DAQ AT-MIO-16X
• Developed real-time simulation for wireless broadcast system
• Tested acoustic echo cancellation algorithm performance in an anechoic chamber using Ariel DSP96000 data acquisition card and various hands-free speaker phone sets

Education

• Doctor of Philosophy, Electrical Engineering (Ph.D), Carleton University 2003
• Master of Electrical Engineering (M.Eng), Carleton University 1998
• Bachelor of Computer Systems Engineering (B.Eng), Carleton University 1996

Publications

T. Yensen, Hands-Free Terminals for Voice Over IP, Ph.D. Thesis, Carleton University, Jan. 2003.

T. Yensen, I. Lambadaris and R. Goubran, “HMM delay prediction technique for VoIP,” IEEE Trans. On Multimedia, v. 5, no. 3, pp. 444-457, Sept. 2003.

T. Yensen and R. Goubran, “An acoustic echo cancellation structure for synthetic surround sound,” Proc. IEEE Int’l Conf. Acoustics, Speech and Signal Processing, 2001, pp. 3237-3240.

T. Yensen, R. Goubran and I. Lambadaris, “Synthetic stereo acoustic echo cancellation structure for multiple participant VoIP conferences,” IEEE Trans. On Speech and Audio Proc., v. 9, no. 2, pp. 168-174, Feb. 2001.

T. Yensen, J. Ryan, R. Goubran and I. Lambadaris, “Synthetic stereo acoustic echo cancellation structure with microphone array beamforming for VoIP Conferences”, Proc. IEEE Int’l Conf. Acoustics, Speech and Signal Processing, 2000, pp. 817-820.

T. Yensen, M. Parperis, R. Goubran and I. Lambadaris, “Echo target determination using acoustic round trip delay for voice Over IP conferences,” Proc. IEEE Int’l Symp. Circuits and Systems, 1999, pp. 348-351.

T. Yensen, M. Parperis, I. Lambadaris and R. Goubran, "Determining acoustic round trip delay for VoIP conferences," Proc. IEEE Second Workshop on Multimedia Signal Processing, 1998, pp. 161-166.

T. Yensen, Structures and Interfaces for Voice Over IP, M.Eng Thesis, Carleton University, Oct. 1998.

T. Yensen, R. Goubran, and I. Lambadaris, “A multiple participant CTI acoustic echo cancellation structure,” Proc. IEEE Nordic Signal Processing Symp., 1998, pp. 193-196.

Awards

Ontario Graduate Scholarship – Science and Tech (OGS-ST) 2000-2001

Rachel and David Epstein Award 1999

Natural Sciences and Engineering Research Council of Canada (NSERC) PGS-B Scholarship 1998-2000

NSERC PGS-A Scholarship 1996-1998

Carleton University Senate Medal 1996

Faculty of Engineering Scholarship 1992, 1993, 1994, 1995

Unitel Canada Scholars Corporate Award 1994

Canada Scholars Recipient 1992, 1993, 1994, 1995

NSERC Summer Research Scholarship 1994

Regional Municipality of Ottawa-Carleton Award 1992

Dean's Honour Role 1993, 1994, 1995, 1996