OFDMA with adaptive subcarrier-cluster configuration and selective loading
First Claim
Patent Images
1. A method comprising:
- receiving pilot symbols from at least two base stations;
estimating a channel response based, at least on, said received pilot symbols;
estimating a first interference level in a data period using said estimated channel response.
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Abstract
A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber.
109 Citations
16 Claims
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1. A method comprising:
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receiving pilot symbols from at least two base stations; estimating a channel response based, at least on, said received pilot symbols; estimating a first interference level in a data period using said estimated channel response. - View Dependent Claims (2, 3, 4)
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5. A method comprising
receiving pilot symbols from at least two base stations; -
determining a first energy level of one or more clusters by performing energy detection for said one or more clusters based, at least, on said received pilot symbols; determining a second energy level of said one or more clusters by performing energy detection for said one or more clusters during a data period; and calculating an energy difference between the first energy level and the second energy level. - View Dependent Claims (6, 7, 8)
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9. A subscriber unit comprising:
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a first processing logic determining a first energy level of one or more clusters by performing energy detection for the one or more clusters based on received pilot symbols from at least two base stations; a second processing logic determining a second energy level of said one or more clusters by performing energy detection for said one or more clusters during a data period; and a third processing logic calculating a difference in the first energy level and the second energy level. - View Dependent Claims (10, 11, 12)
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13. A subscriber unit comprising:
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a first processing logic estimating a channel response based, at least on, received pilot symbols from at least two base stations; and a second processing logic estimating a first interference level in a data period using said estimated channel response. - View Dependent Claims (14, 15, 16)
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Specification