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In this paper, we propose an asymmetric diversity modulation (ADM) scheme for a single-source relay system that utilizes the relay's higher transmission ability as a form of diversity. To achieve this, the proposed method transmits multiple source bits over a high-order modulating relay as a way to provide additional time diversity. The spatial and time diversity then undergo 'bit'-based combining...
We propose a cooperative convolutional coding scheme that exploits spatial diversity and time diversity simultaneously. The proposed scheme combines the cooperative diversity with spread spectrum that achieves diversity gain with the number of relays and minimum free distance while maintaining an average power the same as the maximum ratio combiner (MRC). The results show that our cooperative convolutional...
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