Siavash M. Alamouti

A SIMPLE DIVERSITY TECHNIQUE FOR WIRELESS COMMUNICATIONS
by : SIAVASH M. ALAMOUTI
The Point is that this paper show us or present us about two-branch transmit diversity scheme with 2 antennas and 1 receiver antenna. 
The new scheme doesn't require any bandwidth xpansion any feedback from the receiver to transmitter and its computation complexity is similiar to MRRC
It is further shown that the scheme may easily be generalized to two transmit antennas and M receive antennas to provide a diversity order of 2M       .
No Authors Title Source Summary of Reported  Strength of Reported Weakness of
Research Invention Reported Invetion
1        Siavash M.             Alamouti A Simple Transmit Diversity  IEEE Journal on Select   the point that, this  The goodnews is the only weakness 
Technique for Wireless  Areas in Communications,  scheme present the new the new schemes only  i found on this
Communications vol.16, no.8, October 1998 scemes with 2 tx antennas need half power new scheme that has 3 dB  
and 1 rx antena also 2 tx when its transmit. Also disadvantage power
antennas and M rx antennas more efficient because because of the simultaneously
no need any feedback  transmission of 2 distinct symbols of
from receiver to transmitter two antennas

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