Patent ID: 7321581

Claim:
A double weighting parallel interference cancellation method that can be used in a CDMA mobile communication system, comprises: (a) Making a multi-path despreading, channel estimation and a multi-path combining on an input signal of a user by a RAKE receiver; (b) Making a hard decision on a result of the multi-path combining; (c) Calculating a reliability coefficient for a result of the hard decision of each symbol by the multi-path combining result and a value of the channel estimation; (d) Regenerating a weighted signal in chip level for the user by the hard decision result, the reliability coefficient and the channel estimation value; (e) Estimating a multiple access interference on each user by the weighted regenerated signal in chip level inputted in parallel of each user, and setting a weight value for a interference cancellation in different stages, weighting the multiple access interference on a expected user; (f) Subtracting the weighted multiple access interference on the expected user from a base band signal of a received signal, and obtaining an output signal of the said expected user, which is also an input signal of the said expected user in the next stage parallel interference cancellation.