Christos Komninakis Homepage

Christos Komninakis

Ph.D. UCLA, December 2000.

Research interests:

Apply communication theory to design efficient schemes for reliable communication through wireless fading channels. Devise efficient estimation algorithms for fading environment.

Specifically, for my Ph.D. research I have devised a method to jointly estimate the phase of a flat Rayleigh fading channel simultaneously with turbo-decoding. This scheme can work either with low-rate turbo codes and no pilot symbols at all (but with a computationally intensive supertrellis decoder) or with conventional pilot symbols and high-rate trellis turbo codes. The latter scheme is computationally reasonable and suitable for a parallel or pipelined implementation. Performance has been assessed via original upper bounds to channel capacity. The ultimate goal of this project is to quantitatively determine the portion of the capacity that has to be sacrificed for channel estimation in a flat fading channel with a given Doppler.

A more recent research project dealt with Kalman-based estimation and equalization via DFE or a Linear Equalizer of a frequency-selective Ricean fading channel. Furthermore, prompted by the recent interest in communication systems using multiple transmitter and receiver antennas, this estimation and equalization technique has been extended for systems with multiple inputs and outputs, such as multi-user communication systems or TDMA systems with multiple transmit and receive antennas.

Education

Ph.D. in Electrical Engineering at UCLA, conferred December 2000.

Rick Wesel

M.S. in Electrical Engineering from UCLA, June 1997.
Diploma in Electrical Engineering from National Technical University of Athens (NTUA), Athens, Greece, February 1996.