The design and analysis of unequal error protection fountain coding for multiple source networks over binary erasure channels |
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| Authors: | HanQin Shao DaZhuan Xu XiaoFei Zhang |
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| Affiliation: | 1. School of Electronic Information Engineering, Beihang University, Beijing, 100191, China
2. Department of Electrical and Computer Engineering, University of Delaware, Newark, DE, 19711, USA
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| Abstract: | In this article, we propose a cyclic delay diversity (CDD) transmission scheme for unique word (UW) OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna transmits a UW-OFDM and then, for every UW-OFDM block, the i-th transmit antenna transmits a cyclically delayed version of the symbols transmitted at the first transmit antenna. With this proposed CDD-OFDM system, each antenna transmission is a UW-OFDM. Also, at the receiver under a certain condition on the cyclic delay amounts, the received signal is equivalent to that of a single transmit antenna UW-OFDM transmission with a longer multipath channel. We design the lengths of UW and cyclic delays to achieve the full multipath and spatial diversities for the CDD-UW-OFDM system when the linear MMSE receiver is used. We then present some simulation results to illustrate the claimed performance of the proposed system. |
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| Keywords: | asymptotic analysis fountain codes binary erasure channels network coding linear program nonlinear program unequal error protection multiple source networks |
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