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In this paper a joint transmit scheme employing VBLAST and STBC MIMO profile is considered for a MC DS CDMA system. By combining both the MIMO profile spatial multiplexing and diversity gain can be achieved. At the receiver we employed the generalized MUDs like MAP, combined OSIC and SIC detectors. Also, the performance of a joint MAP/OSIC detector is assayed. To detect the signal, channel matrix...
In this paper we propose a novel switched interleaving algorithm based on limited feedback for downlink DS-CDMA systems. The proposed switched chip-interleaving DS-CDMA scheme requires the cooperation among the transmitter, the receiver and a feedback channel sending the index of the interleaver to be used. The transmit chip-inter leaver is chosen by the receiver from a codebook of interleaving matrices...
Direct sequence code division multiple access (DSCDMA) is mainly an interference limited channel. When several users are accessed in a common channel and since signature sequences assigned to users are not perfectly orthogonal, so interference is introduced in each user's desired signal. Several interference cancellation methods were proposed to reduce multi-access interference. In this paper, we...
In this paper, a new information theoretic algorithm is proposed for signal enumeration in DS-CDMA networks. The approach is based on the predictive description length (PDL) of the observation vector. The PDL is the length of a predictive code of observations. For signal detection, the PDL criterion is computed for the candidate models and is minimized to determine the number of signals. The proposed...
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