In this paper we introduce a technique of eigenbeamforming based on the channel correlation matrix and paired with orthogonal space-time code (O-STBC) at the transmitter side of the link. This structure combines the spatial signal paths decorrelation with the diversity gain provided by the space-time code, which results in performance improvement. The probability distributions for both bit-erro...

It is generally thought that space-time block codes (STBCs) can obtain no more than full space diversity. In this paper, we propose a new construction method of joint orthogonal STBCs based onM dimensional lattice constellations for obtaining space and time diversities simultaneously. By deriving the Chernoff bound of error probability, we prove the exact diversity gain of the proposed code is ...

Quasi-orthogonal space-time block codes (QO-STBCs) are proposed for long-code WCDMA systems which exploit the subspace structure of the long-code WCDMA transmission. QOSTBCs achieve full code rate at the expense of loss in diversity gain. In this paper, we propose a feedback method for QO-STBCS in WCDMA to achieve full diversity and full code rate. The bit error rate (BER) performance for the p...

Résumé – Dans cet article, nous proposons un codage spatio-temporel en bloc non orthogonal de rendement symbole 1 pour 3 antennes à l’émission. Ce code permet d’améliorer les performances d’un système de communications sans fil. Le code proposé peut être décodé soit simplement par forçage à zéro soit en utilisant un décodeur à maximum de vraisemblance à complexité réduite. Finalement, nous avon...

We analytically prove that the outage capacity of the multiple input multiple output (MIMO)which is affected by interference, that is non-causally available aswell as the channel state information (CSI) for all users at the transmitter, has the free interference outage capacity. Specifically, Orthogonal space–time block coding (O-STBC) with two transmit antennas and arbitrary number of receive ...