RADIATED POWER CONTROL FOR A MULTI-ANTENNA TRANSMISSION
First Claim
1. A method of controlling radiated power for a data transmission, comprising:
- estimating an array gain based on a synthesized antenna pattern for the data transmission; and
limiting the transmit power for the data transmission based on the array gain and a radiated power limit.
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Accused Products
Abstract
To meet a radiated power limit, a transmitting station determines a synthesized antenna pattern based on steering vectors used for spatial processing and estimates an array gain based on the synthesized antenna pattern. Different spatial processing modes (e.g., eigensteering and spatial spreading) result in different synthesized antenna patterns. The array gain may be estimated based on the spatial processing mode used for the data transmission and applicable parameters (e.g., eigenvalues) for that mode. An element gain for each antenna used for data transmission may also be estimated. The transmitting station then limits the transmit power for the data transmission based on the array gain, the element gain, and the radiated power limit, which may be an effective isotropic radiated power (EIRP) limit imposed by a regulatory agency.
21 Citations
29 Claims
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1. A method of controlling radiated power for a data transmission, comprising:
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estimating an array gain based on a synthesized antenna pattern for the data transmission; and limiting the transmit power for the data transmission based on the array gain and a radiated power limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus in a wireless communication network, comprising:
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a controller to estimate an array gain based on a synthesized antenna pattern for a data transmission; and a control unit to limit transmit power for the data transmission based on the array gain and a radiated power limit. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An apparatus in a wireless communication network, comprising:
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means for estimating an array gain based on a synthesized antenna pattern for a data transmission; and means for limiting transmit power for the data transmission based on the array gain and a radiated power limit. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A computer-program storage apparatus for controlling radiated power for a data transmission comprising a memory having one or more software modules stored thereon, the one or more software modules being executable by one or more processors and the one or more software modules comprising:
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code for estimating an array gain based on a synthesized antenna pattern for a data transmission; and code for limiting transmit power for the data transmission based on the array gain and a radiated power limit. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification