作　　者： ; ; ; ;

机构地区： 北京邮电大学电信工程学院信息与通信工程学院

出　　处： 《北京邮电大学学报》 2005年第4期58-61,共4页

摘　　要： 根据已知瞬时信道状态信息或统计信道状态信息2种情况,分析了不同转发方式下两跳中继系统的信道容量,并以最大化系统容量为优化准则,提出了在发射端和中继器间的最优功率分配方案.仿真结果表明,与传统的平均功率分配相比,最优功率分配能根据信道状态的变化自适应地调整两跳发射功率,显著提高系统容量. Based on the instantaneous or the statistical channel state information, the channel capacity of a two-hop relaying system was analyzed according to the different relaying methods. Taking the system capacity as the optimization criterion, an optimal power allocation scheme was proposed to distribute a certain power between the transmitter and the relay station. The numerical results show that, when compared with the uniform power allocation, the optimal power allocation can adaptively adjust each-hop power based on the different channel conditions, and can utilize the resources efficiently to further improve the system capacity.

关 键 词： 非再生中继 再生中继 信道状态信息 功率分配

领　　域： [电子电信]