Patent ID: 7773562

Claim:
A base station configured for wireless communication on an uplink channel and a downlink channel jointly with a first wireless transmit/receive unit (WTRU) and a second WTRU, wherein the uplink channel and the downlink channel each carry data communications containing a midamble code sequence (MAi), a spreading code (Ci), and a scrambling code (Si) that are uniquely assigned to the base station, the first WTRU, and the second WTRU to distinguish from neighboring WTRUs and base stations, the base station comprising: a first channel estimator configured to produce a first channel estimate of the uplink channel from the first WTRU responsive to a first midamble (MA 1 ); a second channel estimator configured to produce a second channel estimate of the uplink channel from the second WTRU responsive to a second midamble (MA 2 ); a data estimator configured to: jointly detect data received from the first WTRU and the second WTRU, the data estimator using a first spreading code and a first scrambling code with respect to the first WTRU and using a second spreading code and a second scrambling code with respect to the second WTRU; and output a soft combined data signal; and a decoder configured to decode convolutional coding or turbo coding of the soft combined data signal to produce a reconstructed data signal transmitted by the first WTRU and the second WTRU.