A cumulant subspace approach to FIR multiuser channel estimation

Blind identification of FIR multiuser channels using higher-order statistics (HOS) is investigated in this work. Higher order statistical information is exploited to identify systems with an equal number of users and outputs. A sufficiency condition is presented and is less stringent than many known conditions. Furthermore, a new blind identification method is developed which extends the second order subspace approach to HOS with closed-form solutions. This algorithm is shown to be capable of identifying a wider class of channels and is robust to some channel order over-estimation.

[1]  Z. Ding.  Cumulant matrix subspace algorithms for blind single FIR channel identification , 1999, Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics. SPW-HOS '99.

[2]  M. Martone.  Subspace methods for blind identification of multichannel FIR filters using space-time contraction of cumulants , 1998, IEEE Signal Processing Letters.

[3]  D. Brillinger.  Time Series: Data Analysis and Theory. , 1981 .

[4]  Eric Moulines,et al.  Subspace methods for the blind identification of multichannel FIR filters , 1994, Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing.

[5]  Philippe Loubaton,et al.  A subspace algorithm for certain blind identification problems , 1997, IEEE Trans. Inf. Theory.

[6]  Karim Abed-Meraim,et al.  Blind identification of multi-input multi-output system using minimum noise subspace , 1997, IEEE Trans. Signal Process..

[7]  Jitendra K. Tugnait,et al.  Identification and deconvolution of multichannel linear non-Gaussian processes using higher order statistics and inverse filter criteria , 1997, IEEE Trans. Signal Process..

[8]  Zhi Ding,et al.  A cumulant matrix subspace algorithm for blind single FIR channel identification , 2001, IEEE Trans. Signal Process..

[9]  Yujiro Inouye,et al.  Cumulant-based blind identification of linear multi-input-multi-output systems driven by colored inputs , 1997, IEEE Trans. Signal Process..

[10]  Eric Moulines,et al.  Subspace methods for the blind identification of multichannel FIR filters , 1995, IEEE Trans. Signal Process..

[11]  Zhi Ding.  Cumulant matrix subspace algorithm for blind single fir channel identification , 1999, Defense, Security, and Sensing.