Outage Diversity of MIMO Block-Fading Channels with Causal Channel State Information
2010 (English)In: IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY, 2010, 2168-2172 p.Conference paper (Other academic)
We study the outage diversity of the multiple-input multiple-output (MIMO) Rayleigh block-fading channel when causal channel state information (CSI) is available at the transmitter (CSIT). Within this setting, we consider the optimal power allocation for blocks b = 1,..., B given perfect CSIT for blocks 1,..., b - u only, subject to a long-term power constraint. The parameter 0 <= u <= B is a fixed arbitrary integer that determines the delay in acquiring perfect knowledge of the CSI at the transmitter. Without explicitly solving the optimal power allocation problem, we derive the outage diversity of the system. For general 0 <= u <= B, we derive a simple recursive expression for computing the outage diversity. For the special case u = 0, it is shown that the outage diversity is infinite, coinciding with previously known results. For 1 <= u <= = B, the outage diversity becomes finite and for the special case of u = 1, 2 it can be expressed in simple closed form.
Place, publisher, year, edition, pages
2010. 2168-2172 p.
, IEEE International Symposium on Information Theory
IdentifiersURN: urn:nbn:se:kth:diva-62608DOI: 10.1109/ISIT.2010.5513466ISI: 000287512700436ScopusID: 2-s2.0-77955672977OAI: oai:DiVA.org:kth-62608DiVA: diva2:480803
2010 IEEE International Symposium on Information Theory. Austin, TX. JUL 13-13, 2010
QC 201203072012-01-202012-01-192012-03-07Bibliographically approved