Abstract: In order to solve the problem of traditional space-time coding cooperation scheme with higher power consumption and lower data transmission efficiency, this paper proposes a novel Cooperation Space-time Network Coding（CSTNC） scheme in cooperation networks with multiple sources and single relay. The CSTNC scheme takes advantage of multiple antennas to obtain receiving diversity, and designs space-time network coding at relay node. Then the relay transmits signals to destination node depending on the encoding matrix. The simulation results show the system performance in the cases of different numbers of sources and relay antennas. Meanwhile, the system performance and transmission efficiency between traditional space-time coding cooperation scheme and the proposed CSTNC scheme are analyzed. It demonstrates that the proposed CSTNC scheme is a high-efficiency wireless transmission mode which is easy to implement and has good performance.

Key words: Multi-resources Distributed Cooperative Network, space-time network code, time slot, transmission efficiency

摘要： 为改善传统空时编码协作方案中节点功率消耗过高和传输效率较低的问题，在多信源、单中继协作网络中提出一种新的空时网络编码方案。该方案利用中继节点的多天线优势实现接收分集，并在中继节点设计空时网络编码，再按照编码矩阵特点转发信号到目的节点。仿真验证了信源数、中继天线数不同时的系统性能，并分析了传统空时编码协作方案与提出方案的性能差距和传输效率，得出该方案是一种易于实现，性能良好的高效无线数据传输方式的结论。

关键词: 多源分布式协作网络, 空时网络编码, 时隙, 传输效率