Patent ID: 8472411
Filing Date: 2013-06-25
Classification: H04B,H04L

Abstract:
1. A method for multi-user detection in a Code Division Multiple Access (CDMA)-based channel for use in a base station receiver, comprising: receiving signals, each comprising a CDMA code, from a communication channel; respectively performing correlation operations on the CDMA codes of the received signals to obtain a plurality of corresponding first correlation values; dividing the CDMA codes into first and second code groups according to a first threshold and corresponding first correlation values; performing an interference cancellation procedure on the received signals to remove signals corresponding to the first code group therefrom and obtaining a removed signal; respectively performing correlation operations on the CDMA codes of the removed signal to obtain a plurality of corresponding second correlation values, wherein each of the second correlation values correspond to one of the first correlation values; subtracting each of the first correlation values from the corresponding one of the second correlation values to generate a subtraction result and comparing each subtraction result with a second threshold to generate a comparison result; and determining whether the CDMA codes within the first code group are correct according to the comparison results, wherein the first threshold is dynamically adjusted according to the comparison results.