JOINT DETECTOR IN A CODE DIVISION MULTIPLE ACCESS RADIO RECEIVER

WIPO Patent Application WO2006115459

A3

A joint detector (42) that improves the performance of receiving a downlink control channel signal for a near-end mobile terminal in the presence of a stronger control channel signal addressed to a far-end mobile terminal sharing the same OVSF or channelization code through the use of orthogonal signature sequences. Depending on the specific embodiment, the joint detector may produce the desired bits for the control signal of interest, or may produce detected bits for all control signals sharing the same OVSF code. The joint detector despreads and combines the received code-multiplexed signal, utilizing knowledge of the cross correlations of the set of signature sequences and time-varying channel coefficients to alleviate performance degradation caused by interference from other signals. In various embodiments, the joint detector may be implemented as 15 a modified decorrelating detector (43), a modified MMSE detector (44), a modified LS estimator detector (45), a successive interference-canceling detector, or a jointly hypothesized detector (46).

WO/2003/019794	METHOD AND APPARATUS IMPLEMENTING RETRANSMISSION IN A COMMUNICATION SYSTEM PROVIDING H−ARQ
JPH11509718	[Title of Invention] Decoding Retransmitted Data in a Coded Communication System
WO/2022/030989	METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING WIRELESS SIGNAL IN WIRELESS COMMUNICATION SYSTEM

WANG YI-PIN ERIC (US)
CHENG JUNG-FU (US)

PCT/SE2006/050076

December 14, 2006

April 13, 2006

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ERICSSON TELEFON AB L M (SE)

H04L1/18; H04J11/00

US6574270B1	2003-06-03
US6501788B1	2002-12-31
US20060056360A1	2006-03-16

See also references of EP 1875623A4

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