Patent ID: 7130365
Filing Date: 2006-10-31
Classification: H01Q

Abstract:
1. A baseband processing method based on smart antenna and interference cancellation for a communication system including one or more antenna units linked to one or more corresponding radio frequency transceivers which are linked to a baseband processor, where each antenna unit comprises k user channels, wherein k is a natural number, and the baseband processing method comprises the steps of: A. obtaining a sampled-data output signal from each antenna unit and said corresponding radio frequency transceivers, estimating k user channels for each antenna unit based on said sampled-data output signal using a predetermined user training sequence, and obtaining k user responses for each antenna unit from said estimated user channels; B. calculating a main path and a multipath power distribution for each user channel of all antenna units within a searching window, calculating each user maximum peak value power position based on the calculated power distribution, storing the calculated peak value power position in a power point, and obtaining de-spread results of all signals at the power point with a smart antenna algorithm; C. reconstructing the de-spread results, adding a scramble code, and then obtaining a chip level reconstructed signal; D. subtracting the reconstructed signals from said sampled-data output signals; and E. repeating steps B to D until recovering all user signals.