Space–time code: Difference between revisions

Revision as of 09:16, 20 April 2013

Revision as of 11:47, 4 May 2013

Line 8:

STC may be further subdivided according to whether the receiver knows the [[channel (communications)|channel]] impairments. In [[coherent space-time code|coherent STC]], the receiver knows the channel impairments through training or some other form of estimation. These codes have been studied more widely, and [[division algebras]]<ref name="divalg">{{cite journal|author=B.A. Sethuraman, B. Sundar Rajan, and V. Shashidhar|title=Full-diversity, high-rate space-time block codes from division algebras|journal=IEEE Transactions on Information Theory|pages=2596&ndash;2616|volume=49|issue=10|month=October | year=2003}}</ref> over number fields have now become the standard tool for constructing such codes.

In [[noncoherent STC]] the receiver does not know the channel impairments but knows the statistics of the channel.<ref name="hm">{{cite journal|author=Marzetta, T.L. and Hochwald, B.M.|title=Capacity of a mobile multiple-antenna communication link in Rayleigh flat fading|journal=IEEE Transactions of Information Theory|month=January | year=1999|volume=45|issue=1|pages=139–157|doi=10.1109/18.746779}}</ref> In [[differential space–time code]]s neither the channel nor the statistics of the channel are available.<ref name="jsac">{{cite journal|author=V. Tarokh and [[Hamid Jafarkhani|H. Jafarkhani]]|title=A Differential Detection Scheme for Transmit Diversity|journal=IEEE Journal on Selected Areas in Communications|month=July | year=2000|volume=18|issue=7|doi=10.1109/49.857917|pages=1169&ndash;1174}}</ref>

== See also ==