摘要
介绍了基于特征波束成形的多天线传输技术.针对特征波束成形技术与两种典型的多天线技术(空时编码和分层空时)相结合的系统,从提高系统传输性能出发,分别推导了在独立同分布衰落信道中,发射端已知信道相关矩阵信息的情况下,特征波束成形的功率分配算法.仿真和分析结果表明,在发射端已知信道信息有限的情况下,作者提出的方法能显著改善多天线传输系统的性能,并且在发射天线间存在相关性时,仍能改善系统的性能.
Eigen-beamforming technique is introduced in two typical multi-antenna systems space-time block coding and vertical bell-labs layered space time. When the channel covariance information is known by the transmitter, optimal power allocation algorithm for eigen-beamforming is proposed based on minimizing the transmission errors. Also, it is indicated that the algorithm can be simplified when the channel is independent-identically distributed channel. By simulation and analysis, eigen-beamforming can greatly improve the performance of multi-antenna system when this power allocation algorithm is adopted and the performance improvement still exists when there is correlation between transmit antennas.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2007年第11期1001-1004,共4页
Transactions of Beijing Institute of Technology
基金
国际合作项目
关键词
无线通信
多天线技术
特征波束成形
功率分配
wireless communication
multi-antenna system
eigen-beamforming
power allocation
