Patent ID: 7050490

Claim:
An iterative method for blind deconvolution using an equalizer in a communications receiver for estimating one of users' symbol sequences (u j [n], j=1, 2, . . . , K), the method at each iteration comprising the steps of: updating the equalizer coefficients ν I at the Ith iteration using the following equation: v I = α · R ~ - 1 ⁢ d ~ I - 1 d ~ I - 1 H ⁢ R ~ - 1 ⁢ d ~ I - 1 ; determining the associated equalizer output e I [n]; and comparing inverse filter criteria J p,q (ν I ) with J p,q (ν I−1 ) and if J p,q (ν I )>J p,q (ν I−1 ), going to the next iteration, otherwise updating ν I through a gradient type optimization algorithm so that J p,q (ν I )>J p,q (ν I−1 ) and then obtaining the associated e I [n]; wherein {tilde over (R)} is a expected value {tilde over (d)} is a cumulation, α is a scale factor, and p,q are nonnegative integers.