摘要
该文研究了相位噪声对时分复用切换信道测量仪所测结果的影响,提出一种基于开关快速切换的信号发送和接收方法。通过在不同发射天线上发送相互正交的测试序列,增加了在一个快拍周期内在收发天线对之间的切换次数。与传统方法相比,该方法缩短了天线开关的持续时间,使相位噪声对不同收发天线对的影响基本相同。通过仿真分析,采用该文提出的切换方案后,有效地减轻了相位噪声对多天线信道容量的过估计。
This paper analyzes the impact of phase noise in a time-division multiplexed switching(TDMS) channel sounder,with a signal transmission and receiving method developed based on fast switching.Orthogonal sequences are sent through different transmitters to increase the number of switching between different antenna elements in one snapshot.Compared with traditional methods,the switching scheme can reduce the switching duration to ensure the uniform phase noise infection on different element pairs.Simulation results show that the scheme can reduce the channel capacity overestimation led by phase noise.
出处
《清华大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第10期1674-1679,共6页
Journal of Tsinghua University(Science and Technology)
基金
国际科技合作项目(2008DFA12160)
国家"九七三"重点基础研究项目(2007CB310608)
新世纪优秀人才支持计划(NECT-050071)
关键词
时分复用切换
相位噪声
信道测量仪
多天线
信道容量
time-division multiplexing switching(TDMS)
phase noise
channel sounder
MIMO
channel capacity