RADIO BASE STATION DEVICE AND RADIO COMMUNICATION METHOD

摘要

The signal in the preamble part transmitted through an RACH (Random Access channel) is received by an AAA (Adaptive Array Antenna) in directivity patterns using a conventional weight, not using the weight calculated by using the signal in the preamble part, a delay profile for each directivity pattern is defined, and the preamble part and spectrum despreading timing are detected by using the delay profiles. The gist of the invention is to AAA-transmit the control signal through an AICH (Acquisition Indication Channel) in the directivity pattern selected when the signal in the preamble part is AAA-received.