摘要
针对目前多输入多输出(MIMO)系统功率分配中只考虑在奇异值分解(SVD)前提下运用注水原理进行功率分配的缺点,采用满足一定性能的(QoS)服务质量,在奇异值分解和注水原理的基础上,根据是否满足服务质量来关闭某些子信道以节约发射功率和减少信道间的干扰,根据发射速率和发射功率的关系,将发射速率归一化到离散传输速率并在此基础上计算发射该速率所用的功率,将剩余功率按注水原理分配给各个子信道以提高信道性能。
At present, the power allocation of MIMO system is made with water-filling method only based on singular value decomposition, so an improved method is proposed.The method shuts off some sub-channels on the condition that the quality-of-service （QoS） is satisfied to save transmission power and reduce inter-channel interferences. The transmission rate is normalized to a discrete rate, and then the transmission power is computed according to this discrete rate. Finally,the residual power is allocated to all sub-channels based on water-filling theory.
出处
《无线电通信技术》
2008年第3期1-3,共3页
Radio Communications Technology
基金
四川教育厅科技项目(2006A096)
西南科技大学科技项目(06zx7107)
关键词
多入多出
UWB
功率分配
奇异值分解
multiple input multiple output（MIMO）
UWB
power allocation
singular value decomposition
