EP 1504535 A1 20050209 - APPARATUS, AND ASSOCIATED METHOD, FOR FACILITATING ANTENNA WEIGHT SELECTION UTILIZING DETERMINISTIC PERTURBATION GRADIENT APPROXIMATION
Title (en)
APPARATUS, AND ASSOCIATED METHOD, FOR FACILITATING ANTENNA WEIGHT SELECTION UTILIZING DETERMINISTIC PERTURBATION GRADIENT APPROXIMATION
Title (de)
VORRICHTUNG UND ZUGEORDNETES VERFAHREN ZUM ERMÖGLICHEN EINER ANTENNENGEWICHTSAUSWAHL UNTER VERWENDUNG EINER DETERMINISTISCHEN PERTURBATIONSGRADIENTENAPPROXIMATION
Title (fr)
APPAREIL ET PROCEDE ASSOCIE PERMETTANT DE FACILITER LA SELECTION DU POIDS D'UNE ANTENNE A L'AIDE D'UNE APPROXIMATION DE GRADIENT DE PERTURBATION DETERMINISTE
Publication
Application
Priority
- US 0315228 W 20030515
- US 14615902 A 20020515
- US 33404502 A 20021230
Abstract (en)
[origin: WO03098823A1] Apparatus, and an associated method, for facilitating selection of optimal antenna weightings by which to weight signals sent in a communication system that utilizes closed-loop transmit diversity. A deterministic perturbation gradient approximation technique is utilized in which perturbation vectors are selected (136) by a selector and applied, by an applicator, to antenna weighting elements. A selected set of perturbation vectors are applied to the antenna weighting elements in both a positive direction and a negative direction (138). A detector at a receiving station measures in disassociated with the signals communicated thereto, once weighted with the perturbation vectors. A single-bit feedback value is returned to the sending station, and the antenna weightings are appropriately adjusted (142). The technique is utilized during both non-handoff conditions and during handoff conditions.
IPC 1-7
H04B 1/38; H04B 17/00; H04B 1/06; H04B 7/00; H04M 1/00; H04Q 7/20; H01Q 3/22; H01Q 3/24; H01Q 3/26
IPC 8 full level
CPC (source: EP KR)
H01Q 3/26 (2013.01 - KR); H04B 7/022 (2013.01 - EP); H04B 7/06 (2013.01 - KR); H04B 7/0634 (2013.01 - EP); H04B 7/0641 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03098823 A1 20031127; AU 2003234571 A1 20031202; CN 100435489 C 20081119; CN 1653706 A 20050810; EP 1504535 A1 20050209; EP 1504535 A4 20100421; KR 100890793 B1 20090331; KR 20040108803 A 20041224
DOCDB simple family (application)
US 0315228 W 20030515; AU 2003234571 A 20030515; CN 03810817 A 20030515; EP 03728913 A 20030515; KR 20047018202 A 20030515