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Due to the capacity achievable, Multiple-Input Multiple-Output (MIMO) systems witnessed more interest in recent years. Several data detection algorithms are available for MIMO systems, especially the tree-search ones which offer lower complexity comparing to the ML receiver. In this paper, we are interested in one of tree-search algorithms, which is the Stack decoder. Nevertheless, the stack decoder...
Classical ML decoders for multiple input multiple output (MIMO) systems like the sphere decoder, the Schnorr-Euchner algorithm, the Fano and the stack decoders suffer from high complexity for high number of antennas and large constellation sizes. In this paper, we propose the use of parallel processing for stack decoding, to decode signals transmitted on linear MIMO channels to reduce time consumption...
In existing MIMO systems, either optimal or sub-optimal decoders can be used according to the required performance. However, the optimal decoders give ML performance but have very high complexity and the sub-optimal decoders give low complexity but poor performance. Moreover for ML decoding, the variable decoding time at a fixed SNR for the different channel realizations and also the big gap in the...
Differential encoding is required for phase modulation optical transmission systems but leads to higher bit error rate. We propose a construction of the codeword of the forward error correction allowing performance enhancement and complexity decrease.
In this work, we are interested in the decoding of MIMO systems by using sequential decoders. These ones consist on tree search algorithms and were originally used to decode binary codes. They were rediscovered and adapted to MIMO systems by Murugan and al. We are interested here in the stack decoder. We propose a new sequential decoder that we call the spherical-bound stack decoder (SB-Stack) combining...
In this paper, the selective time division multiple access (S-TDMA) strategy is studied in the downlink channel. This strategy consists in transmitting data to the user with the largest capacity. The diversity and multiplexing gains that can be achieved by this sub-optimal strategy are evaluated and then compared to the optimal gains over the broadcast channel. Codes construction is then proposed...
In this paper, linear precoding for non-orthogonal space time block codes (STBC) is investigated. A theoretical model of spatial correlation with a Laplacian distribution of AOA is first derived. The design of the precoder is based on the choice of the codeword error matrix according to a criterion. We propose here a new criterion based on the system outage probability to select the suitable codeword...
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