摘要
研究宽带码分多址系统中瑞利衰落信道下使用导频符号辅助信道估计的方法,并提出应用回归算法改进信道估计.在初始估计中,由传统方法得到的信道参数估计值,通过长时线性或二次曲线回归来修正短时估计误差.仿真结果表明,在宽带码分多址系统中应用该方法可以获得0.4dB的增益.
Pilot symbol-assisted channel estimation under Rayleigh fading channel in wideband code division multiple access (WCDMA) is investigated. Application of regression algorithm in channel estimation is presented. After initial channel estimation with the classical methods, channel gains estimated are filtered by linear or conic regression algorithm within a given regression length. Simulation results showed that this method offers up to 0.4 dB of gain in a WCDMA system.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2004年第7期634-637,共4页
Transactions of Beijing Institute of Technology
基金
与爱立信公司的国际合作项目
关键词
宽带码分多址
信道估计
回归算法
wideband code division multiple access (WCDMA)
channel estimation
regression algorithm
