Patent ID: 7075973

Claim:
A system for multiuser detection of a received signal, the received signal including voice signals and data signals, wherein the voice signals are lower power than the data signals, said system comprising: a first detector having an input to receive the received signal and an output, said first detector extracting only the data signals from the received signal and outputting them as soft symbols; a hard decision converter having an input connected to said first detector output and an output, said hard decision converter converting the soft symbols output by said first detector into hard symbols; an interference canceller having a first input configured to receive the received signal and a second input connected to said hard decision converter output, and an output, said interference canceller canceling a contribution of the data signals from the received signal; and a second detector having an input connected to said interference canceller output, said second detector extracting only individual voice signals, said second detector being a different detector type than said first detector; wherein said first detector is a blind minimum mean square error detector and said second detector is a matched filter or a RAKE-receiver.