Patent ID: 7535864
Filing Date: 2009-05-19
Classification: H04B,H04J

Abstract:
1. A radio communication terminal apparatus comprising: a first correlation system that calculates a correlation between a received signal having a plurality of slots and a short code common to all base stations to obtain first correlation values; a detecting system that detects a maximum value of the obtained first correlation values to detect a slot timing; a second correlation system that calculates a correlation between the received signal and each of a plurality of candidates for a long code group identification short code to obtain second correlation values in association with the detected slot timing; an acquiring system that obtains a long code group in association with the long code group identification short code with a maximum value of the obtained second correlation values, while detecting a beginning position of a long code in association with a pattern of the obtained second correlation values to detect a frame timing; a third correlation system that calculates a correlation between the received signal and each of long codes belonging to the obtained long code group in association with the detected frame timing to obtain third correlation values; and an identification system that identifies a long code used by a base station that transmits the received signal, in association with the obtained third correlation values.