Patent ID: 8995498
Filing Date: 2015-03-31
Classification: H04B,H04J

Abstract:
1. A method for performing a two-stage interference cancellation in a wireless communication system, comprising: cancelling from a receive signal, in a first stage interference cancellation, an estimated interference signal generated from an estimated transmit signal; channel match filtering the interference canceled receive signal using a channel match filter to produce an intermediate signal; combining the intermediate signal with the estimated transmit signal to produce a modified filtered signal; multiplying the modified filtered signal with a conjugate pseudonoise sequence of a given cell to produce a first descrambled signal; generating the estimated transmit signal for a next iteration of the first stage interference cancellation from the first descrambled signal; and processing, in a second stage interference cancellation, the first descrambled signal using a detect multi-user transmission module and a re-detect multi-user transmission module to produce a detected signal; wherein the detect multi-user transmission module employs a multi-user interference matrix that relates each received symbol to a corresponding user symbol and other user symbols.