Derivation of optimal antenna weights during soft handover

A receiver for a mobile terminal in a wireless communication system, said receiver capable of estimating optimal antenna weights for use during a soft handover between base stations using closed loop transmit diversity, comprising:

• an antenna verification unit configured to estimate downlink antenna weights for each base station involved in said soft handover, said estimated antenna weights based on a channel response of each of said downlinks;
• a control unit adapted to determine a reliability of said feedback information detection at each of said base stations and to obtain scale factors based on said reliability of said feedback information detection;
• an antenna weight optimization unit configured to apply said scale factors to said channel responses and to calculate optimal antenna weights based on said channel responses having said scale factors applied thereto;
• and
• a feedback information unit adapted to send said optimal antenna weights as feedback information on uplinks for all base stations involved in said soft handover.

In a mobile terminal of a wireless communication system, a method of informing a plurality of base stations to adjust their antenna weights, comprising:

• determining a reliability of feedback information detection at said plurality of base stations;
• adjusting antenna weights to be communicated to said base stations based on said reliability of said feedback information detection;
• and
• sending said antenna weights as feedback information to said base stations.

A mobile terminal of a wireless communication system, said mobile terminal configured to inform a plurality of base stations to adjust their antenna weights, comprising:

• means for determining a reliability of feedback information detection at said plurality of base stations;
• means for adjusting antenna weights to be communicated to said base stations based on said reliability of said feedback information detection;
• and
• means for sending said antenna weights as feedback information to said base stations.