초록 ▼

Systems and methods for cancelling interference in received CDMA signals due to known components in the received signals which have been digitized to form a composite digitized baseband signal, for example due to pilot channel components in received CDMA IS-95 3G compliant signals which would otherw

Systems and methods for cancelling interference in received CDMA signals due to known components in the received signals which have been digitized to form a composite digitized baseband signal, for example due to pilot channel components in received CDMA IS-95 3G compliant signals which would otherwise interfere with the detection of unknown data streams. The pilot channel signals are detected, and an estimate of the air interface for each pilot channel signal is made. The pilot channel signals are then passed through a respective model of the air interface, and the resulting output is subtracted from the composite digitized baseband signal, thereby removing interference due to the pilot channel signals.

대표청구항 ▼

[ We claim:] [14.]14. A method of reducing interference due to components carrying known information in a composite digitized baseband signal comprising:detecting the known information for each said component and producing a respective estimate of an air interface over which each said component was

[ We claim:] [14.]14. A method of reducing interference due to components carrying known information in a composite digitized baseband signal comprising:detecting the known information for each said component and producing a respective estimate of an air interface over which each said component was received;passing the known information for each component through a model of the respective air interface which is based upon the respective estimate of the air interface to produce a respective estimated component;delaying the composite digitized baseband signal to produce a delayed composite digitized baseband signal an amount of time equal to how long it takes for the steps of detecting and passing;subtracting the estimated components from the delayed composite digitized baseband signal to produce a corrected composite digitized baseband signal.