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1. (WO2005065122) SYSTEME D'ANTENNES A RECEPTION SIMULTANEE ADAPTATIF
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CML00925U
CLAIMS

1. A method for using a arrangement of antennas to recover a modulated radio signal, comprising:
identifying an electromagnetic scattering environment type as one of a set of electromagnetic scattering environment types;
selecting a best element combination from the arrangement of antennas based on the electromagnetic scattering environment type; and combining radio signals intercepted by the best element combination.

2. The method according to claim 1 , wherein the identifying of the
electromagnetic scattering environment type comprises using a current set of correlation coefficient measurements made using a radio signal received at each best element combination of a set of element combinations and prior information obtained using the set of electromagnetic scattering environment types.

3. A method for using an arrangement of antennas to recover a modulated radio signal, comprising:
measuring a set of correlation coefficients, each correlation coefficient determined using a radio signal intercepted at each element of a
corresponding element combination having a first polarization orientation, each corresponding element combination formed from two elements in the arrangement of antennas;
determining a lowest correlation coefficient of the set of correlation coefficients; and
combining radio signals intercepted by the element combination corresponding to the lowest correlation coefficient when the lowest correlation coefficient has a value below a threshold value;
combining radio signals intercepted by two orthogonally oriented elements of the arrangement of antennas when the lowest correlation coefficient has a value above the threshold value.

CML00925U

4. An antenna system, comprising:
an antenna structure, comprising
an arrangement of antennas, each antenna comprising at least one element that has a common polarization, and at least one antenna that is a dual polarized antenna;
a signal combiner that combines radio signals intercepted by an element combination into a combined radio signal; and
a switching matrix that selects a best element combination of the arrangement of antennas.

5. The antenna system according to claim 4, wherein the arrangement of antennas is characterized by a set of antenna separations that are optimized to provide lowest correlation coefficients for a corresponding set of
electromagnetic environment types.

6. The antenna system according to claim 4, wherein the best element combination is one of a dual polarized element combination and a separated element combination, and wherein the dual polarized element combination comprises two orthogonal elements of an antenna in the arrangement of antennas that is a dual polarized antenna, and wherein the separated element combination comprises two elements having the same polarization selected from two antennas of the arrangement of antennas.

7. The antenna system according to claim 4, further comprising:
a signal receiver, coupled to the arrangement of antennas, that generates a demodulated signal from the combined radio signal; and
an antenna system controller coupled to the signal receiver and antenna structure that selects the best element combination based on an electromagnetic scattering environment type identified from a set of
electromagnetic scattering environment types.

CML00925U

8. The antenna system according to claim 7, further comprising:
a device controller, coupled to the signal receiver, that processes the demodulated signal to recover information that is used by at least one application that is run by the device controller.

9. The antenna system according to claim 4, further comprising:
a signal receiver, coupled to the arrangement of antennas, that generates a demodulated signal from the combined radio signal; and
an antenna system controller coupled to the signal receiver and antenna structure that selects the best element combination based on correlation coefficient measurements made using a radio signal received at each element combination of a set of element combinations.

10. A method for establishing an optimum diversity antenna arrangement for recovering a modulated radio signal that is intercepted by the diversity antenna arrangement, comprising:
identifying a set of electromagnetic environment types that comprises distinct radio environments for a particular frequency range;
determining a set of optimum antenna separations for the set of electromagnetic environment types, wherein each optimum antenna separation provides a minimum correlation coefficient; and
establishing the optimum diversity antenna arrangement by
determining an arrangement of antennas that provides a plurality of antenna separations determined from the set of optimum antenna separations and includes at least one dual polarized antenna.