Equalized parallel interference cancellation for cdma systems

摘要

A method of detecting a spread spectrum composite signal r comprises plural user signals b1, b2,...bK that have been spread with spreading codes. The composite signal r is received at a rake receiver, a rake receiver output is obtained, first hard-decision values bRake are produced based on the rake receiver output, first parallel interference cancellation values are produced based on bRake, second hard-decision values bPIC are produced based on the first parallel interference cancellation values. First and second hard-decision values are combined for producing first combination values, second parallel interference cancellation values are produced based on the first combination values. Third hard-decision values are produced based on the second parallel interference cancellation values as output of the equalized parallel interference cancellation detector at a first stage, wherein the first parallel interference cancellation values are produced by regenerating the induced multiple access interference.