Weighted Sum Rate Maximization for MIMO-OFDM Systems with Linear and Dirty Paper Precoding

Autoren:

Kurzfassung:

Many sophisticated resource allocation strategies are based on the maximization of the weighted sum of data rates
for a given transmit power. While this problem can be easily solved for orthogonal multiple access schemes like
TDMA, it is much more complicated if users are separated in space using multiple antennas at the base station due
to the mutual coupling. In this paper, we propose a new projected conjugate gradient algorithm for the optimization
of the transmit filters. The power constraint is taken into account in the calculation of the search direction by
projecting the gradient onto a tangent hyperplane. Our method features excellent convergence properties when
applied to dirty paper precoding, and it may also be used for the optimization of linear precoders.

Dokumenttyp:

Konferenzbeitrag

Veröffentlichung:

Ulm, Germany, 14. - 16. Januar 2008

Konferenz:

7th International ITG Conference on Source and Channel Coding (SCC 08)

Index:

294

Dateien:

Paper