Asynchronous cooperative transmission scheme using linear dispersion code |
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Authors: | Gao Ming Ge Jianhua Han Chunlei Chi Kaikai |
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Institution: | [1]State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, P.R. China [2]Tohoku University, Sendai, 980-0871, Japan |
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Abstract: | The cooperative diversity schemes can effectively create a virtual antenna array for combating multipath fading in wireless channels. However, a lot of cooperative diversity schemes require perfect synchronization which is, in practice, difficult and even impossible to be realized. In this paper, we propose an asynchronous cooperative diversity scheme based on the linear dispersion code (LDC). By adding the zero padding (ZP) between linear dispersion codewords, our scheme mitigates the effect of asynchronism effectively. The length of ZP is decided by relative timing errors between different relays. Besides, an easy decoding method of our scheme is given in this paper by restructuring the stacked channel matrix. |
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Keywords: | linear dispersion code (LDC) asynchronization cooperative diversity zero padding (ZP) relay |
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