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This paper describes a multi-level scheme to annotate gesture, posture and gaze in a spontaneous interactional corpus in French. In nonverbal behaviour research there is a lack of available, accessible and spontaneous multimodal corpora. One of the challenges is to use structural and reliable coding schemes to study the relationships among different(More)
In this paper, we propose a multi-user detector for space-time uplink transmission in multi-carrier CDMA systems. We propose a new combination using STBC, OFDM and CDMA spreading. The OFDM codewords are built from chips issued from different symbols. The STBC encoding is done at the last stage of the transmitter and we place STBC decoder after multi-user(More)
In this paper a new criterion is proposed for precise timing synchronization in multiple-input multiple-output (MIMO) system. Although this criterion is derived for block flat fading channel, according to the simulation results presented in this paper, the proposed method can also be used for frequency selective channel. Using this method, offset frequency(More)
In this paper, a precise timing synchronization technique is proposed for multiple-input multipleoutpzrt MMO system. The proposed algorithm can be used for iEEE 802. I l a wireless LAN system. We modified the existing algorithm in literature to obtain exact packet arrival timing. We then use this advantage to better estimate frequency ofsset due to locd(More)
In this paper, we introduce particle filtering for detection of BLAST systems. We propose at first a procedure to build prior distributions. Then, we establish an equivalent whitening filter output system model which enables to apply sequential Monte Carlo sampling, or particle filtering for detection. The proposed algorithm achieves near optimum(More)
We present the performance of a new multi-user detector for space frequency uplink transmission in multi-carrier CDMA systems. In our proposed architecture, the data symbols are parallelized and then each of the symbols is spread by a spreading code before sending the chips as multiple OFDM codeword. The SFBC decoder is placed at the last stage of our(More)
This paper introduces new variations about the codes recently introduced by Jafarkhani & al named Super Orthogonal Space Time Trellis Codes (SOSTTC). Using powerful set partitioning rules, these codes are able to combine the coding advantage of STTC’s together with the advantage diversity of STBC. This partitioning is based mainly on the determinant(More)
We present a new architecture of layered space-time codes as a combination of BLAST architecture and of special STTC codes which are variations about the codes first introduced by Jafarkhani et al. and named super orthogonal space-time trellis codes (SOSTTC). Using powerful set partitioning, these codes are able to combine the coding advantage of STTC's(More)
We examine the performance of a multiuser space time diversity system for an uplink environment when it is interfaced by an LDPC code. The proposed structure uses a new combination of STBC, OFDM and CDMA spreading. The OFDM codewords are built from chips issued from different symbols. The STBC encoding is done at the last stage of the transmitter and we(More)
In this paper, we propose a multi-user detector for space time uplink transmission in multi-carrier CDMA systems. We propose a new combination using STBC, OFDM and CDMA spreading. Furthermore we propose a turbo equalization scheme based on the use of LDPC for channel coding and EM algorithm for channel estimation at the LDPC decoder input. Simulation(More)