协作通信技术可以通过利用空间分集来改善系统的性能,特别是当信源节点已经知道信道信息时,可以获得相对于非自适应系统非常大的增益。提出一种基于自适应调制的协作通信方案,此方案结合了空时编码、功率分配和中继选择技术,在满足一定的误码率要求下可以提高系统吞吐量。通过与其它自适应、非自适应方案性能的比较,表明所提出的方案可以在很好地满足误码率要求的前提下,具有非常好的吞吐量性能。 Collaborative communication technology can improve the performance of the system by using space diversity, especially when the source node already knows the channel information, it can obtain a very large gain relative to the non-adaptive system. A cooperative communication scheme based on adaptive modulation is proposed. This scheme combines space-time coding, power allocation and relay selection to improve the system throughput under a certain bit error rate. Compared with other adaptive and non-adaptive schemes, the proposed scheme shows that the proposed scheme can achieve very good throughput performance under the premise of meeting the bit error rate requirements well.