H - Electricity
04
W
H04W 24/00 (2009.01) H04B 17/00 (2006.01)
Patent
CA 2627563
Expert system for evaluating diversity antenna installations. Antenna elements 11a. 11b have the respective coverage areas 32a and 32b. Due to an antenna mismatch the diversity is degraded or even lost for reception from mobile stations 13. 33 especially far from the antenna. By measuring the received signal strength. RXLEV. difference from the mobile stations in the respective branches of the diversity antenna the mismatch could be evaluated and corrected. By dividing the coverage areas into several zones with different distance to the antenna the result is enhanced.
Cette invention concerne un système expert destiné à évaluer des installations d~antenne à réception simultanée. Des éléments d~antenne (11a, 11b) ont des zones desservies respectives (32a, 32b). En raison d~une asymétrie d~antenne, la réception simultanée est dégradée, voire perdue, pour une réception de stations mobiles (13, 33), notamment éloignées de l~antenne. Une mesure de la différence d~intensité du signal reçu (RXLEV) des stations mobiles dans les branches respectives de l~antenne à réception simultanée permet d~évaluer et de corriger l~asymétrie. Une division des zones desservies en plusieurs zones ayant différentes distances à l~antenne permet d~améliorer le résultat.
Lennartson Benny
Sundberg Krister
Ericsson Canada Patent Group
Telefonaktiebolaget Lm Ericsson (publ)
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