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A new quasi-orthogonal space-time block code (QO-STBC) scheme, based on eigen value decomposition (EVD), is explored in this paper. The new scheme can significantly reduce the QO-STBC decoding complexity at receiver and achieves better bit-error rate (BER) performance as well. With EVD manipulations, the detection matrix and the channel matrix can be redefined to remove all interference terms which...
A new quasi-orthogonal space-time block code (QO-STBC) based on ABBA code with lower decoding complexity and higher bit error statistics (BER) performance was proposed by U. Park recently, which can obtain full transmission rate and full diversity. In this article, the authors proposed an improved U. Park scheme based on rotational ABBA code. For eliminating the interference terms resulting from neighboring...
Network congestion has become more critical due to the rapid increase in the total number of Internet users and applications. This paper gives a survey for the research development of network congestion control in the past twenty years. The evaluation index of the ideal congestion control protocol is introduced, such as stability, fairness, efficiency, etc. Several network models and analysis methods...
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