| 摘要 |
CDMA mobile communication technology whereby each base station can be identified with a high degree of accuracy in uplinks from a mobile station to base stations, and inbound base station reception characteristics can be improved. With this technology, a mobile station 103 assigns different short codes to a signal with all of base stations 101a through 101c as destinations (a DPCH signal) and a signal with only a specific a base station 101a through 101c as a destination (an ACK/NACK signal in response to an HS-DSCH signal from a base station 101a through 101c). The mobile station 103 then spreads a transmit signal using the assigned short code and a long code specific to itself, and transmits the spread signal. A base station 101a through 101c then receives the signal from the mobile station 103, despreads the received signal using the aforementioned assigned short code and the aforementioned long code specific to the mobile station 103, and regenerates the pre-spreading signal.
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