On transmit diversity with imperfect channel state information

Eduard Jorswieck, Holger Boche

Research output: Contribution to journalConference articlepeer-review

31 Scopus citations


The optimal transmission strategy of a multiple-input single-output wireless communication link is studied in which the receiver has full channel state information and the transmitter has only long-term channel state information in terms of the channel covariance matrix. A necessary and sufficient condition for the optimal eigenvalues of the transmit covariance matrix is presented. A necessary and sufficient condition for achieving capacity when transmitting in m directions is developed. Main questions regarding the system design are answered using these conditions. It is shown how the optimal number of transmit antennas can be computed to achieve full spatial diversity given the channel covariance matrix. The maximum number of required parallel data streams is computed and a transmit diversity function is defined in order to obtain a measure for the available spatial diversity.

Original languageEnglish
Pages (from-to)III/2181-III/2184
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
StatePublished - 2002
Externally publishedYes
Event2002 IEEE International Conference on Acoustic, Speech, and Signal Processing - Orlando, FL, United States
Duration: 13 May 200217 May 2002


Dive into the research topics of 'On transmit diversity with imperfect channel state information'. Together they form a unique fingerprint.

Cite this