Method and apparatus for multi-antenna transmission
First Claim
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1. A method for multi-antenna transmission, the method comprising the steps of:
- receiving a plurality of subcarriers at a receiver, the plurality of subcarriers being transmitted from a transmitter;
grouping the subcarriers into a plurality of subcarrier blocks, each subcarrier block comprising K subcarriers; and
calculating for each subcarrier block a single weighting matrix Vc;
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Abstract
In a multiple-input, multiple-output (MIMO) communication system, a method and apparatus for multi-antenna transmission. In accordance with the preferred embodiment of the present invention a reduced number of transmit weight matrices are fed back to the transmitter. Each transmit weight matrix is then applied to a plurality of subcarriers. Because each transmit weight matrix is applied to more than one subcarrier, the amount of weight matrixs being fed back to the transmitter is greatly reduced.
194 Citations
19 Claims
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1. A method for multi-antenna transmission, the method comprising the steps of:
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receiving a plurality of subcarriers at a receiver, the plurality of subcarriers being transmitted from a transmitter;
grouping the subcarriers into a plurality of subcarrier blocks, each subcarrier block comprising K subcarriers; and
calculating for each subcarrier block a single weighting matrix Vc;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for multi-antenna transmission, the method comprising the steps of:
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receiving a plurality of subcarriers;
grouping the plurality of subcarriers into a plurality of subcarrier blocks, each subcarrier block comprising K subcarriers;
calculating a single weighting matrix Vc for each of the plurality of subcarrier blocks; and
weighting all subcarriers within the subcarrier block with Vc. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus comprising:
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an adaptive weight controller, the adaptive weight controller having as an input, a plurality of subcarriers and outputting a plurality of weighting matrices Vc, wherein;
a single weighting matrix is calculated for a subcarrier block comprising K subcarriers. - View Dependent Claims (17, 18, 19)
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Specification