Last Updated: 05-30-09
Yiannis Spyropoulos
Phone: (858) 822-4389
E-mail: yiannis @ ucsd . edu
Office: CalIT2 4405
Mailing Address:
Dept. of Electrical and Computer Engineering
9500 Gilman Drive, Mail Code 0407
University of California, San Diego
La Jolla, CA 92093-0407
Graduate Advisor:
Prof. James Zeidler, Tel: (858) 534-5369
Email: zeidler@ece.ucsd.edu
Research Interests
-
Interference management in wireless networks via physical (PHY) and medium access control (MAC) layer techniques.
The first part of my research focuses on third generation TDD/CDMA cellular networks with asymmetric traffic.
Specifically, I have proposed a crossed-slot interference mitigation scheme based on decentralized interference-aware
dynamic channel allocation and space-time MMSE joint detection. Simulation-aided performance analysis of this scheme
has demonstrated considerable throughput gains (in uplink) compared to benchmark dynamic and fixed channel allocation schemes.
The second part of my research focuses on MIMO wireless ad hoc networks. I have designed a PHY-MAC cross-layer
protocol that enhances spatial reuse and energy-efficiency by incorporating power control and antenna beamforming into medium
access. I have optimized the protocol parameters and studied the impact of multiple antennas on protocol performance.
Education
- Ph.D. candidate in Electrical and Computer Engineering, University of California San Diego.
- Preliminary exam passed in August 2005.
- Qualifying exam passed in September 2006.
- M.S. in Electrical Engineering, Stanford University, June 2002.
- Diploma in Electrical and Computer Engineering, National Technical University of Athens, July 2000.
Honors/Awards
- Cuthbert C. Hurd Scholarship in Mathematical Sciences, Stanford University, 2000.
- Fulbright Foundation Scholarship, 2000.
- Technical Chamber of Greece (TEE) Student Award, 1998-1999.
- Greek State Scholarships Foundation (IKY) Student Award, 1996-1998.
Publications
- [J1] I. Spyropoulos and J. R. Zeidler, ``Supporting Asymmetric Traffic in a TDD/CDMA Cellular Network via Interference-Aware Dynamic Channel Allocation and Space-Time LMMSE Joint Detection," IEEE Trans. Veh. Technol., vol. 58, no. 2, pp. 744-759, Feb. 2009 [.pdf].
- [C2] I. Spyropoulos and J. R. Zeidler, ``A PHY-MAC Cross-Layer Protocol for Ad Hoc Networks with Multiple-Antenna Nodes,'' to appear in Proc. IEEE Int. Conf. Commun. (ICC), Dresden, Germany, Jun. 2009 [.pdf].
- [C1] I. Spyropoulos and J. R. Zeidler, ``Dynamic Channel Allocation and Space-Time LMMSE Joint Detection in a TDD/CDMA Cellular Network with Traffic Asymmetry,'' Proc. IEEE 65th Veh. Technol. Conf. (VTC), Dublin, Ireland, Apr. 2007 [.pdf].
Work Experience
- ATMEL Berkeley Design Center, Berkeley, CA, Jun-Aug 2002
Summer Technical Intern Developed discrete cosine transform (DCT) block filtering algorithms in MATLAB to reduce the complexity and speed up the convergence of acoustic echo cancellation. - Luminous Networks, Cupertino, CA, Jul-Sep 2001
Summer Technical Intern Performed testing/debugging of the transparent virtual LAN functionality over a fiber-optic ring network and coded a C program to compute packet metrics at the ring switches. - National Technical University of Athens, Greece, Feb-Jul 2000
Research Associate Designed and implemented the PA, LNA amplifiers and the IF, RF filters of a 13 GHz satellite transceiver in microstrip technology and measured their performance in the microwave lab. - British Telecom Adastral Park, Martlesham Heath, UK, Aug-Oct 1999
Summer Technical Intern Experimented with various topologies for PPP dial-up access to a FreeBSD 3.2 network access server and compared them in terms of IP address space requirements and scalability.
Teaching Experience
- Stanford University, Stanford, CA, Jan-Jun 2002
Graduate Teaching Assistant Led weekly review sessions, prepared homework solutions and graded exam papers for the courses 'Probabilistic Systems Analysis' (EE 178) and 'Introduction to Communication Systems' (EE 279).
Hobbies
Links
