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Alamouti scheme provides a diversity gain no more than 2 over time-selective fading channels under the circumstances of 2??1 MIMO. A full-rate space-time code, space-time codes for time-selective fading (STC-TS), is proposed to provide more diversity gain when the channels fade fast. While the transmission lasts 2N (N>1) symbol periods, the diversity gain is almost 2N. What's more, the optimization...
This paper addresses the problem of automatic modulation recognition of digital signals. A classification method based on spectral correlation and Support Vector Machine (SVM) is developed. The spectral correlation theory is introduced and several characteristic parameters which can be used for modulation analysis are extracted. The parameters are used as the input feature vectors to SVM. SVM maps...
We propose a novel successive relaying scheme based on network coding (SRS), which achieves the same spectral efficiency in half-duplex multi-hop relaying channels as point-to- point transmission does. Except for the source and destination nodes, every hop in the multi-hop relaying link, two relay nodes are arranged, a transmitting relay node and a receiving relay node, and continuously switch their...
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