Transmit correlated array gain reduction
First Claim
Patent Images
1. A method comprising:
- at a wireless communication device having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas;
dividing subcarriers of at least one transmit signal into groups;
allocating power to the groups of the subcarriers of the at least one transmit signal to be weighted across the plurality of transmitters for transmission; and
applying a precoding matrix for each subcarrier so that for each subcarrier, only one transmitter is allocated a maximum power and no beamforming occurs per subcarrier.
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Abstract
Techniques are presented herein to achieve reduced array gain associated with a transmission made from multiple antennas of a wireless communication device. In accordance with one technique, a wireless communication device is provided having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas. Subcarriers of at least one transmit signal to be weighted across the plurality of transmitters are allocated power so that for each subcarrier, only one transmitter is allocated a maximum power.
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Citations
18 Claims
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1. A method comprising:
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at a wireless communication device having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas; dividing subcarriers of at least one transmit signal into groups; allocating power to the groups of the subcarriers of the at least one transmit signal to be weighted across the plurality of transmitters for transmission; and applying a precoding matrix for each subcarrier so that for each subcarrier, only one transmitter is allocated a maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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at a wireless communication device having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas; dividing subcarriers of M plurality of transmit signals into groups; allocating power to the groups of the subcarriers of the M plurality of the transmit signals for simultaneous transmission by the plurality of transmitters based on a number of subcarriers of the M plurality of transmit signals; and applying precoding matrices for each subcarrier so that for each subcarrier, only M transmitters are allocated maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (6)
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7. An apparatus comprising:
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a plurality of transmitters and a corresponding plurality of antennas; and a baseband processor configured to be coupled to the plurality of transmitters, wherein the baseband processor is configured to; divide subcarriers of at least one transmit signal into groups; allocate power to the groups of the subcarriers of the at least one transmit signal to be weighted across the plurality of transmitters for transmission; and apply a precoding matrix for each subcarrier so that for each subcarrier, only one transmitter is allocated a maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (8, 9, 10)
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11. An apparatus comprising:
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a plurality of transmitters and a corresponding plurality of antennas; and a baseband processor configured to be coupled to the plurality of transmitters, wherein the baseband processor is configured to; divide subcarriers of M plurality of transmit signals into groups; allocate power to the groups of the subcarriers of the M plurality of transmit signals for simultaneous transmission by the plurality of transmitters; and apply precoding matrices for each subcarrier so that for each subcarrier, only M transmitters are allocated maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (12)
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13. One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:
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queue at least one transmit signal for transmission, the at least one transmit signal comprising a plurality of subcarriers; divide subcarriers of at least one transmit signal into groups; and allocate power to the groups of the subcarriers of the at least one transmit signal to be weighted across the plurality of transmitters for transmission; and apply a precoding matrix for each subcarrier so that for each subcarrier, only one transmitter is allocated a maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (14, 15, 16)
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17. One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:
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queue at least one transmit signal for transmission, the at least one transmit signal comprising a plurality of subcarriers; divide subcarriers of M plurality of transmit signals into groups; allocate power to the groups of the subcarriers of the M plurality of transmit signals for simultaneous transmission by a plurality of transmitters; and apply a precoding matrix for each subcarrier so that for each subcarrier, only M transmitters are allocated maximum power and no beamforming occurs per subcarrier. - View Dependent Claims (18)
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Specification