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A simplified maximum likelihood (ML) detector for Hi orthogonal space-time block coding (STBC) based on multi-step constellation reduction technique is presented. In the proposed algorithm, complexity is reduced by maintaining small ML search space, instead of searching over the entire constellation. The simulation results suggest that the proposed reduced search-space detection algorithm offers ML...
In orthogonal frequency division multiplexing (OFDM) systems, one of the major problems to be tackled is high peak to average power ratio (PAPR). In this paper a PAPR reduction scheme for OFDM system is proposed that takes the advantage of the classification capability of learning vector quantization (LVQ) networks. The symbols are distributed in different classes and interleaved by a different interleaver,...
A new orthogonal coded multi-input- multi-output (MIMO) system using Walsh codes is presented in this paper. The proposed spatial multiplexing system offers equivalent bit error rate (BER) performance as compared to the conventional uncoded MIMO system while increasing data transmission rate by two folds. The optimum maximum likelihood (ML) detector is used in the proposed system. As ML detector offers...
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