Content-based adaptive array antenna system with parasitic...

H - Electricity – 01 – Q

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Details

H01Q 3/44 (2006.01) H01Q 3/26 (2006.01) H01Q 19/32 (2006.01) H01Q 21/00 (2006.01) H01Q 21/20 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2390343

An adaptive parasitic array antenna system having properties of directive gain, self-pointing and interference rejection is provided including an adaptive parasitic array antenna comprising at least one active element and one or more parasitic elements coupled to controlled impedances (CI). The system further comprises a transceiver, a content-based optimization criterion computation module (CBOCM), and a control variable optimizer (CVO). The CBOCCM receives a signal waveform from the active element through the transceiver, and computes an optimization criterion (OC) based on the content of ht4e received signal. The optimization criterion is coupled to the CVO, which adaptively computes one or more control variables (CV), which are coupled to the controlled impedances CI in order to adjust the beampattern created by the adaptive parasitic array antenna. Also disclosed are two preferred adaptation implementations and algorithms, a pilot-tone based adaptation system, and a decision-directed based adaptation system.

Système d'antenne en réseau adaptative à éléments passifs, ayant des propriétés de gain de directivité, d'auto-pointage et de rejet des bruits, qui comporte une antenne en réseau adaptative à éléments passifs dotée d'au moins un élément actif et d'un ou plusieurs éléments passifs couplés à des impédances commandées (CI). Ledit système comporte encore un émetteur-récepteur, un module de calcul de critère d'optimisation basé sur du contenu (CBOCCM), et un optimiseur de variables de commande (CVO). Le CBOCCM reçoit une onde signal de l'élément actif par l'intermédiaire de l'émetteur-récepteur et calcule un critère d'optimisation (OC) basé sur le contenu du signal reçu. Le critère d'optimisation est couplé au CVO qui calcule de manière adaptative une ou plusieurs variables de commande (CV), elles-mêmes couplées aux impédances commandées (CI) afin d'ajuster le diagramme de rayonnement créé par ladite antenne. Deux mises en oeuvre et algorithmes préférés d'adaptation, un système d'adaptation basé sur la fréquence pilote et un système d'adaptation basé sur la direction par décision sont également décrits.

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