A blind MMSE multipath combining method for a RAKE receiver is proposed. The method make use of the data before and after the onset of the desired user's transmission. By performing generalized eigendecomposition of the autocorrelation matrices of the post-RAKE signals in the two interval, an MMSE combiner for the desired user signal can be obtained without the need of the channel state information. The method does not require a precise model nor assume whiteness of the interference. An adaptive algorithm is also developed.