Text Box: Address:	#19 Cal(IT)2, East Peltason, 
Irvine, CA 92697-2800. 
Phone:	(949) 824-3020 

E-mail:          sekbatan at uci dot edu
         siavashe at broadcom dot com
				 

Text Box:  
      Siavash Ekbatani


I received my Ph.D. degree from the Department of Electrical Engineering and Computer Science (EECS) at the University of California, Irvine (UCI), working with Professor Hamid Jafarkhani.

I am currently employed by Broadcom Corporation as a staff scientist.


Research

My major research interests are communications theory, wireless communications, signal processing, and information theory.

I was working for an ARO Multi University Research Initative (MURI) project on space-time processing for tactical Ad-Hoc networks.


Thesis

Communication over multiple antenna fading channels using quantized and erroneous feedback information

Full-text [PDF], slides [PS]

Using only the receiver knowledge about the fading channel state, open-loop communication is possible. The main question, however, is whether we can improve

these schemes using channel information at the transmitter with a reasonable amount of complexity and overhead. In closed-loop schemes, transmitter knowledge

of the channel conditions is usually obtained using a feedback link from the receiver to the transmitter. Feedback information must be communicated over a reverse

channel in an adequately reliable and quick fashion. This is because communication over each realization of the channel cannot begin before the feedback link is

established. Moreover, the amount of communication resources, such as bandwidth and power dedicated to feedback information must be kept minimal so as not

to significantly affect the rest of the network and to impose the least possible interferences on other users. Should we keep the feedback information scarce, low

power, and prompt, we cannot help facing the issue of unreliable feedback information. Feedback errors and mismatches are extra sources of errors in a close-loop

system, degrading performance severely (even worse than an open-loop scheme). Our main focus in this study is to prevent this phenomenon and to design reliable

and high-rate communication schemes when the knowledge of the transmitter about the channel condition is limited and erroneous.


Publications

Journal

Siavash Ekbatani, Farzad Etemadi, and Hamid Jafarkhani, “Throughput maximization over slowly fading channels using erroneous and quantized feedback,” To appear in IEEE Transactions on Communications, 2008. PDF

Siavash Ekbatani and Hamid Jafarkhani, “Combining beamforming and space-time coding using noisy quantized feedback,” To appear in IEEE Transactions on Communications, 2008.  PDF

Siavash Ekbatani, Farzad Etemadi, and Hamid Jafarkhani, “Outage behavior of slow fading channels with power control using noisy quantized CSIT,” Submitted to IEEE Transactions on Information Theory, 2008.  PDF

Farzad Etemadi, Siavash Ekbatani, and Hamid Jafarkhani, “Joint source–channel coding for slowly fading channels with limited and noisy transmitter side information,” In revision in IEEE Transactions on Information Theory, 2008.

Siavash Ekbatani and Hamid Jafarkhani, “Combining beamforming and space-time coding using quantized feedback,” IEEE Transactions on Wireless Communications, Vol. 7, Issue 3, pp. 898-908, March 2008.  PDF

Javad Kazemitabar, Hamid Jafarkhani, and Siavash Ekbatani, “Code design for rank-deficient correlated channels,” IEE Electronics Letters, Vol. 41, October 2005.  

Conference

S. Ekbatani, F. Etemadi, and H. Jafarkhani, “Rate and power adaptation over slowly fading channels with noisy quantized feedback,Asilomar Conf. on Signals, Systems, and Computers, November 2007. (Invited paper)

 

S. Ekbatani, F. Etemadi, and H. Jafarkhani, “Outage behavior of quasi-static fading channels with partial power control and noisy feedback,IEEE Global Comm. Conf. (GLOBECOM -07), November 2007.

 

F. Etemadi, S. Ekbatani, and H. Jafarkhani, “Joint source-channel coding for quasi-static fading channels with noisy quantized feedback,IEEE Information Theory Workshop (ITW-07), September 2007.

 

S. Ekbatani, F. Etemadi, and H. Jafarkhani, “Transmission over slowly fading channels using unreliable quantized feedback,IEEE Data Compression Conference (DCC-07), March 2007.

 

S. Ekbatani and H. Jafarkhani, “Design of multi-antenna coded modulators using noisy quantized channel state information,IEEE Global Comm. Conf. (GLOBECOM-06), November 2006.

 

S. Ekbatani and H. Jafarkhani, “Space-time coding and beamforming using noisy rate -limited feedback,Asilomar Conf. on Signals, Systems, and Computers, October 2006. (Invited paper)

 

S. Ekbatani, F. Fazel and H. Jafarkhani, “Space-time multi-block coding with covariance beam forming for mobile transceivers in block-fading channels,IEEE Wireless Comm. and Net. Conf. (WCNC-06), April 2006.

 

S. Ekbatani and H. Jafarkhani “Novel space-time-frequency codes with improved distance spectrum for mobile multi-path channels,” IEEE Wireless Comm. and Networking Conf. (WCNC-06), April 2006.

 

S. Ekbatani, L. Liu and H. Jafarkhani, “A power loading scheme for space-time trellis codes based on channel magnitude feedback,” IEEE Global Comm. Conf. (GLOBECOM-05), November 2005.

 

 


Favorites

Songs                    Music

Imagine                       Fugue

My Way                     Taranta