雙循環(huán)相關(guān)復(fù)倒譜的多用戶盲信道辨識(shí)方法
Blind Multiuser Channel Identification Based on Cyclic Complex Cepstrum
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摘要: 該文針對(duì)多用戶系統(tǒng)提出了一種新穎的盲辨識(shí)方法.它利用了調(diào)制引入的循環(huán)平穩(wěn)性,可以識(shí)別出不同的用戶不同的傳感器(天線)各自的傳輸信道.利用循環(huán)復(fù)倒譜的方法可以給出信道的估計(jì),方法簡(jiǎn)單明了,與現(xiàn)有的方法相比有一定的優(yōu)勢(shì),適合于多用戶上行鏈路信道.文中還給出了信道可辨識(shí)性的條件和證明,提出了辨識(shí)算法,并對(duì)算法進(jìn)行了模擬.Abstract: In this paper, a novel approach is presented for the multiuser channel identification. The approach makes use of the modulation-induced cyclostationarity and its capable of identifing individual channels of different users. By measns of the complex cepstrum of cyclic autocorrelaton, the blind estimation of the channelcan be achieved. The appraoch is rather simple, with considerable advantages. The identifiability condition and its proof are also concluded in the paper. Finally, the simulaton of identification algorithm demonstrates its convergence.
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Cao Shi-ke(曹士坷),Zhang Li-jun(張力軍).Blind MIMO channel estimation based on modulationinduced two-cycle cyclostationarity.The Journal of China Universities of Posts and Telecommunications,2002,9(4):38-46.[2]Cao Shike(曹士坷),Zhang Lijun(張力軍).Blind channel estimation for CDMA based on modulation-induced cyclostationarity,Proceedings of the International Conference on Communication Technology (ICCT2003),Beijing,April 2003:1804-1808.[3]Wang Z,Giannakis G B.Wireless multicarrier communications:where Fourier meets Shannon[J].IEEE Signal Processing Magazine.2000,17(5):29-48[4]Hatzinakos D.Nonminimum phase channel deconvolution using the complex cepstrum of the cyclic autocorrelation.IEEE Trans.on Signal Processing,1994,SP-42(11):3026-3042.[5]Hatzinakos D,Nikias C L.Estimation of multipath channel response in frequency selective channels[J].IEEE J.on Selected Areas in Communications.1989,7(1):12-19[6]Picinbono B,Bondon P.Second-order statistics of complex signals.IEEE Trans.on Signal Processing,1997,SP-45(2):411-419.[7]Giannakis G B.Cyclostationary signal analysis,Chapter in Digital Signal Processing Handbook,V.K.Madisetti,D.Williams,editors-in-chief,CRC Press,1998.[8]Pan R,Nikias C L.The complex cepstrum of higher order cumulants and nonminimum phase system identification.IEEE Trans.on Acoustics,Speech and Signal Processing,1988,ASSP36(2):186-205. -
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