Pierre-Jean Bouvet

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Despite the variety of messenger RNA half-lives in bacteria (0.5-30 min in Escherichia coli) and their importance in controlling gene expression, their molecular basis remains obscure. The lifetime of an entire mRNA molecule can be determined by features near its 5' end, but no 5' exoribonuclease has been identified in any prokaryotic organism. A mutation(More)
In this paper, the combination of spatial mul-tiplexing with coded Multi-Carrier Code Division Multiplex Access (MC-CDMA) for a Multiple Input Multiple Output (MIMO) Rayleigh fading multipath channel is considered. A practical receiver structure performing iteratively MIMO detection, multiuser despreading and channel decoding is presented. The MIMO(More)
The development engineer has to face the question of where to place an interleaver in a digital communication system. In this paper we propose to solve this problem according to the channel transmission characteristics in the particular case of turbo-equalization system. Using a state of the art in coded modulations and some simulation results, we deduce(More)
— In this paper, we study the association of Non-orthogonal Space-Time Block Coding (NO-STBC) with channel coding and propose an efficient iterative receiver. For two transmit antennas, the use of the Alamouti scheme as STBC is optimal owing to its orthogonality and its unitary rate. For more than two antennas, full rate is maintained by giving up the(More)
Hermes is a Single-Input Single-Output (SISO) underwater acoustic modem that achieves very high-bit rate digital communications in ports and shallow waters. Here, the authors study the capability of Hermes to support Multiple-Input-Multiple-Output (MIMO) technology. A least-square channel estimation algorithm is used to evaluate multiple MIMO channel(More)
Linear precoded OFDM systems with channel coding have already been demonstrated to efficiently exploit frequency and time diversities of the transmission channel. Iterative receivers which iteratively perform channel decoding and deprecoding provide very good performance. In the literature, these iterative receivers are based on maximum likelihood based(More)
Étude et optimisation des systèmes multi-antennes associés à des modulations multiporteuses Remerciements Les travaux présentés ici ont été réalisés dans le laboratoire de recherche "RESeaux d'Ac-cès/Broadband Wireless Access/Interfaces Radio Innovantes" RESA/BWA/IRI à France Te-lecom R&D Cesson Sévigné. Je tiens d'abord à remercier France Telecom R&D pour(More)
In this paper, the authors present a time-varying underwater channel estimation method based on the channel sparsity characteristic. The proposed algorithm is applied to provide both an accurate and fast channel estimate to a multiple-input multiple-output (MIMO) channel and to isolate each of the channel's echoes. The technique is demonstrated in a fully(More)