Paper No: 37
Channel estimation for O-STBC MISO systems using fourth-order cross-cumulants
Author(s): Héctor Pérez Iglesias, Adriana Dapena
Abstract
This paper proposes several algorithms to recover the transmitted
signals in systems with multiple antennas that make use of orthogonal
space time block code (O-STBC) to attain full transmit diversity. We
interpret the scheme proposed by Alamouti and
half-rate systems presented as classic blind source separation (BSS) problems
where the received signals (observations) are instantaneous mixtures
of the transmitted signals (sources). In order to recover the sources,
we first propose to perform an eigenvalue decomposition of matrices
containing fourth-order cross-cumulants of the
observations. Subsequently, we show that the performance of this
approach can be improved by doing a simultaneous diagonalization of the
cumulants matrices. This second approach can be interpreted as a
particular case of Joint Approximate Diagonalization of Eigen-matrices
(JADE) algorithm for systems where the mixing matrix is orthogonal. |
