Apparatus comprising an antenna array
First Claim
1. Apparatus, comprising:
- an antenna array comprising a plurality of antenna elements,a plurality of circuit units, each unit configured to mix a radio frequency signal from one or more of the antenna elements with oscillating signals having phases defined by a global reference signal and to provide local in-phase and quadrature-phase signals;
a constellation rotation system configured to, for each unit, rotate a constellation point associated with the local in-phase and quadrature-phase signals by a rotation angle—
based on comparison of the local in-phase and quadrature-phase signals with one or more global in-phase and quadrature-phase signals to provide adjusted in-phase and quadrature-phase signals;
signal buses for global in-phase and quadrature-phase signals configured to receive the adjusted in-phase and quadrature-phase signals, respectively, from a plurality of the units; and
a feedback system configured to, for each unit, compare one or more of the adjusted in-phase and quadrature-phase signals with one or more of the global in-phase and quadrature-phase signals to determine an error in the rotation angle,wherein said global in-phase and quadrature-phase signals correspond to a superposition of the adjusted in-phase and quadrature-phase signals provided by said circuit units.
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Accused Products
Abstract
Apparatus (100) is described comprising: an antenna array (1021 . . . 102N); a plurality of units (1041 . . . 104N), each unit configured to mix a radio frequency signal from one or more of the antennas (102) with oscillating signals having phases defined by a global signal and to provide in-phase and quadrature-phase signals; a constellation rotation system configured to, for each unit, rotate a constellation point associated with the in-phase and quadrature-phase signals by a rotation angle to provide adjusted in-phase and quadrature-phase signals; signal buses (106, 107) for global in-phase and quadrature-phase signals configured to receive the adjusted in-phase and quadrature-phase signals, respectively, from a plurality of the units; a feedback system configured to, for each unit, compare one or more of the adjusted in-phase and quadrature-phase signals with one or more of the global in-phase and quadrature-phase signals to determine an error in the rotation angle.
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Citations
17 Claims
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1. Apparatus, comprising:
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an antenna array comprising a plurality of antenna elements, a plurality of circuit units, each unit configured to mix a radio frequency signal from one or more of the antenna elements with oscillating signals having phases defined by a global reference signal and to provide local in-phase and quadrature-phase signals; a constellation rotation system configured to, for each unit, rotate a constellation point associated with the local in-phase and quadrature-phase signals by a rotation angle—
based on comparison of the local in-phase and quadrature-phase signals with one or more global in-phase and quadrature-phase signals to provide adjusted in-phase and quadrature-phase signals;signal buses for global in-phase and quadrature-phase signals configured to receive the adjusted in-phase and quadrature-phase signals, respectively, from a plurality of the units; and a feedback system configured to, for each unit, compare one or more of the adjusted in-phase and quadrature-phase signals with one or more of the global in-phase and quadrature-phase signals to determine an error in the rotation angle, wherein said global in-phase and quadrature-phase signals correspond to a superposition of the adjusted in-phase and quadrature-phase signals provided by said circuit units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising, for each of a plurality of radio signals from antenna elements of an antenna array:
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mixing the radio frequency signal with oscillating reference signals having phases defined by a global signal and providing in-phase and quadrature-phase signals; rotating a constellation point associated with the in-phase and quadrature-phase signals by a rotation angle to provide adjusted in-phase and quadrature-phase signals; adding the adjusted in-phase and quadrature-phase signals to global in-phase and quadrature-phase signals, respectively; and comparing one or more of the adjusted in-phase and quadrature-phase signals with one or more of the global in-phase and quadrature-phase signals to determine an error in the rotation angle. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification