Event Details
Differential Space-Time Block Code: Overview and Research Issues
Presenter: Poramate Tarasak
Supervisor:
Date: Mon, December 8, 2003
Time: 10:00:00 - 11:00:00
Place: EOW 430
ABSTRACT
ABSTRACT:
Since its introduction in year 1998, space-time coding has become one of the fastest growing research area in wireless communications. It is a transmission technique which combines coding, modulation and multiple transmit antennas to achieve higher performance due to its diversity gain. Traditionally, research on space-time coding focuses on the situation where channel state information is known at the receiver. In practice, this assumption is questionable if the mobile moves at a fast speed. Channel estimation becomes difficult or requires too many training which leads to a reduction of data rate. In addition, channel estimation for space-time coding is more difficult than conventional single antenna systems since it has to be done for each transmit-receive antenna pair.
To accommodate future generation of wireless applications which require high speed transmission at high mobility, differential space-time block codes recently emerged in year 2000 forego the channel estimation. Essentially, it is an extension from DPSK applied in single antenna systems and is able to provide diversity gain without channel state information.
The seminar will touch upon the basic concept of differential space-time block code and various research issues such as code constructions, receiver designs and some specific fascinating problems not found in its coherent counterpart, Alamouti's scheme.
Free and open to the public