A cumulant subspace approach to FIR multiuser channel estimation
Jing Liang; Zhi Ding
Statistical Signal and Array Processing, 2000. Proceedings of the Tenth IEEE Workshop on
Volume , Issue , 2000 Page(s):616 - 620
Digital Object Identifier   10.1109/SSAP.2000.870199
Summary: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

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