In cooperative communications, dynamic decode-and-forward transmission with rateless coding (RC-DDF) is most efficient in reaching/approaching channel capacity. However, it entails strict carrier synchronization among the source, relay and destination, making it hard to implement in practice. To remove the limitation, we propose a scheme named dynamic coded cooperation with incremental redundancy (DCCIR) where nodes transmit alternatively and thus no strict carrier synchronization is needed. Its performance is investigated in terms of both throughput and diversity-multiplexing tradeoff (DMT). Moreover, we present a subframe-based implementation structure for DCCIR (sub-DCCIR) to obtain the DMT of DCCIR. The results reveal performance advantages of DCCIR or sub-DCCIR over several existing schemes and its approximation to RC-DDF.

中文翻译：

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具有增量冗余的动态编码合作：吞吐量和多样性-复用权衡分析

在协作通信中，采用无速率编码的动态解码转发传输（RC-DDF) 在达到/接近信道容量方面最有效。然而，它需要在源、中继和目的地之间进行严格的载波同步，使其在实践中难以实现。为了消除这种限制，我们提出了一种称为具有增量冗余的动态编码合作方案（DCCIR)，其中节点交替传输，因此不需要严格的载波同步。从吞吐量和分集复用权衡 (DMT) 两方面研究其性能。此外，我们提出了一个基于子帧的实现结构DCCIR (子 DCCIR) 获得 DMT DCCIR. 结果揭示了性能优势DCCIR 或者 子 DCCIR 在几个现有的方案及其近似 RC-DDF.