JOINT MULTI-CODE DETECTORS IN CDMA COMMUNICATIONS SYSTEM
摘要
A CDMA communication system uses a RAKE receiver, a code correlator and a multi-code joint detector to jointly detect symbols in two or more received signals contained within a composite signal. The RAKE receiver separates the composite signal into two or more RAKE output signals by despreading the composite signal using selected spreading codes. The multi-code joint detector jointly detects the symbols in the received signals using the RAKE receiver output signals, cross-correlations between the spreading codes generated by the code correlator, and RAKE combining weights based on a noise covariance matrix. The multi-code joint detector also includes a trellis that represents possible states and state transitions and a branch metric calculator for calculating branch metrics associated with the state transitions based on the RAKE receiver output signals and the cross-correlations between the spreading codes.
申请公布号
WO2004093333(A3)
申请公布日期
2004.12.02
申请号
WO2004US10561
申请日期
2004.04.06
申请人
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);BOTTOMLEY, GREGORY;WANG, YI-PIN, ERIC;CHENG, JUNG-FU;GRANT, STEPHEN
发明人
BOTTOMLEY, GREGORY;WANG, YI-PIN, ERIC;CHENG, JUNG-FU;GRANT, STEPHEN