Title:
ソフトハンドオーバー中の最適アンテナ重みの導出
Document Type and Number:
Japanese Patent JP4802193
Kind Code:
B2
Abstract:
Wireless communication method and system for improving optimal antenna weight derivation in transmit diversity mode during soft handover. The method and system use scale factors that depend on the reliability of the feedback information (FBI) detection on the uplink. Depending on FBI detections for each link, the scale factors are then applied to the downlink channel response estimates. FBI detection performance may be based on downlink antenna verification, downlink transmit power control command "up/down" ratio, or both. Poor antenna verification or a high number of "power up" commands on the uplink may indicate unreliable FBI detection. By applying higher scale factors to downlink channel responses corresponding to reliable FBI detection, better closed transmit diversity performance during soft handovers may be achieved. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
Inventors:
Lindov, Beng
Application Number:
JP2007532814A
Publication Date:
October 26, 2011
Filing Date:
September 19, 2005
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H04W16/28; H04B7/06; H04B7/10; H04W36/18; H04W52/40; H04W52/42
Domestic Patent References:
| JP2001168777A | ||||
| JP2002198876A |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki
Shinji Oga
Toshifumi Onuki