Recent book on MIMO communications
A. Paulraj, R. Nabar and D. Gore, Introduction to Space-Time Wireless Communications, Cambridge Univ. Press, May 2003.
Here is a link to the book web site.
To view the recently-edited book chapter titled
"Introduction to Space-Time Codes", click HERE. This chapter is to
appear in Applications of Space-Time Adaptive Processing,
IEE Publishers, 2003.