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1. (WO2003063526) METHOD AND APPARATUS FOR CONTROLLING FEEDBACK IN CLOSED LOOP TRANSMISSION DIVERSITY

Pub. No.:    WO/2003/063526    International Application No.:    PCT/JP2002/000300
Publication Date: Jul 31, 2003 International Filing Date: Jan 18, 2002
IPC: H04B 7/02
H04B 7/06
Applicants: FUJITSU LIMITED

SEKI, Hiroyuki

JITSUKAWA, Daisuke

TANAKA, Yoshinori

Inventors: SEKI, Hiroyuki

JITSUKAWA, Daisuke

TANAKA, Yoshinori

Title: METHOD AND APPARATUS FOR CONTROLLING FEEDBACK IN CLOSED LOOP TRANSMISSION DIVERSITY
Abstract:
A method for controlling the feedback in a closed loop transmission diversity that transmits feedback information representative of amplitude and phase control amounts from a mobile station to a radio base station. A mobile station receives, during a handover control, a downstream pilot signal transmitted from a new base station; calculates in advance, based on the received pilot signal, feedback information representative of amplitude and phase control amounts to be transmitted to the new base station; and then transmits this feedback information to the new base station before the switching to the new base station is completed by the handover.