Charlotte Langlais

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—This paper presents an architecture design and implementation of an iterative receiver for linearly precoded MIMO systems. The receiver is composed of two main elements: an MMSE-IC equalizer and a 64-state MAX-LOG-MAP decoder which exchange soft information through an interleaving scheme. Each block of the architecture was designed to reach a trade off(More)
—In this paper, exact diversity-multiplexing trade-off (DMT) at finite signal to noise ratio (SNR) for multiple-input multiple-output (MIMO) systems with dual antennas at the transmitter (2 × Nr) and/or at the receiver (Nt × 2) is derived over Rayleigh fading channels. We derive the outage probability of the mutual information between transmitted and(More)
— Interleave-Division Multiple Access (IDMA) is a multiuser scheme in which chip interleavers are the only means of user separation. The receiver involves a chip-by-chip iterative multiuser detection. Its complexity increases in a linear manner with the number of users, the number of iterations and the number of paths in the case of multipath channels. In(More)
— An improved turbo-equalization process is proposed for linear precoding with iterative decoding. Using recent results in turbo-equalization, we derive the equalization coefficients for an optimized precoding decoder thanks to the SINR criterion. The proposed method keeps a low complexity even with large size precoders and high order modulations.(More)
—Wireless networks can exploit an implicit distributed diversity by the use of cooperative systems thanks to the broadcast nature of the radio link. Cooperation leads to improvements in terms of throughput and/or performance and decreases the sensitivity to channel variations. In this paper, a practical approach for a two-user cooperative wireless network(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)