TITO系统中盲FIR信道辨识方法的性能分析Performance Analysis of Blind FIR Chnanel Identification in TITO System
代凌云,刘琚
摘要(Abstract)：
近年来,统计信号处理已经成为无线通信发展中的一项关键技术,特别是被ISI和MAI严重污染的宽带多用户通信系统。针对TITO(Two-Input-Two-Output)情况下,交叉信号混叠的信道的盲辨识问题介绍了一种分析解法,数学工具是SOS(Second-Order-Statistics)。在阐述问题的时候,认为源谱和混叠信道都是未知的,如果源相关信息有效,这种方法能解决通常的MIMO(Multiple-Input-Multiple-Output)系统问题。针对这种方法,我们对他作了性能分析,仿真结果表明他可以较好地辨识混叠滤波器,具有较强的鲁棒性。并用维纳滤波的方法恢复出了原始语音信号,证明这种方法也适用于非平稳信号的情况。
关键词(KeyWords)： 盲信道辨识;二阶统计;鲁棒性;正则化均方误差
基金项目(Foundation): 曲阜师范大学科研启动基金资助
作者(Author): 代凌云,刘琚
参考文献(References)：
- [1]Diamantaras K I,Petropulu A P,Chen B.Blind Two-Input-two-Output FIR Channel Identification Based on FrequencyDomain Second-order Statistics[Z].IEEE Trans.Signal Pro-cessing,2000,48:534-542.
- [2]Bradaric I,Petropulu A P,Diamantaras K I.On Blind Identi-fiability of FIR-MIMO Systems With Cyclostationary InputsUsing Second Order Statistics[Z].IEEE Trans.on SignalProcessing,2003,51(2):434-440.
- [3]Gerstacker W H,Taylor D P.Blind Channel Order Estima-tion Based on Second-Order Statistics[Z].IEEE Signal Pro-cessing Letters,2003,10(2):39-42.
- [4]Kohno R.Combination of an Adaptive Array Antenna and aCanceler of Interference for Direct-sequence Spread-spec-trum Multiple-access System[Z].IEEE J.Select.AreasCommun.,1990,8:675-681.
- [5]Yellin D,Weinstein E.Multichannel Signal Separation:Methods and Analysis[Z].IEEE Trans.on Signal Process-ing,1996,1.
- [6]Zhi Ding,Li Qiu.Blind MIMO Channel Identification FromSecond Order Statistics Using Rank Deficient Channel Con-volution Matrix[Z].IEEE Trans.on Signal Processing,2003,51(2):535-543.
- [7]Meraim K A,Loubaton P,Moulines E.A Subspace Algo-rithm for Certain Blind Identification Problems[Z].IEEETrans.Inform.Theory,1997,43:499-511.