Patent ID: 7684378

Claim:
A method for estimating channelization codes for an intended wireless transmit/receive unit (WTRU) and other WTRUs in a time division synchronous code division multiple access (TD-SCDMA) for mobile (TSM) downlink transmission, the method comprising: detecting, by a midamble detector, a midamble in a received communication burst; assuming that only one spreading factor (SF) is used; generating a candidate code list in accordance with the detected midamble without knowing SFs for other WTRUs, the candidate code list including channelization codes for the intended WTRU and other WTRUs, the channelization codes being orthogonal variable spreading factor (OVSF) codes; identifying at least one active channelization code among the codes in the candidate list; and forwarding the identified active channelization code to a multi-user detector (MUD).