Patent ID: 7444144

Claim:
A method for wireless communication initiation implemented in a wireless transmit/receive unit (WTRU) configured to communicate with base stations of a wireless system where the WTRU receives an identifying synchronization channel (SCH) signal from at least one base station at a predetermined chip rate in a selected portion of a system time frame, comprising: receiving a wireless signal including at least one SCH signal, wherein the SCH signal has been transmitted in a predetermined timeslot of a system time frame and includes a primary synchronization code (PSC) transmitted in the timeslot at a predetermined chip offset wherein the decoding includes determining a t offset at which the selected SCH is transmitted; identifying received SCH signals using a power threshold based on a plurality of chip samples sampled at twice the chip rate; selecting an identified SCH signal for decoding; decoding the selected SCH signal to determine system time frame timing and base station identity by determining a beginning of the SCH signal by identifying a chip location having a highest signal to noise ratio wherein the noise is computed using a predetermined number of chips that is less than the total number of chips in a frame; and identifying whether the chip location of the PSC sequence was derived from an even sample or an odd sample where the PSC sequence is identified by processing a wireless communication signal at twice the chip rate.