Channel estimation for a wireless communication system
First Claim
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1. A method, comprising:
- receiving a first preamble on a periodic basis, said first preamble having a first set of pilot tones corresponding to a first set of frequency bands from a first subscriber station over an orthogonal frequency division multiple access air interface;
estimating a first channel estimate parameter for each of said first set of frequency bands using said corresponding first set of pilot tones;
estimating a second channel estimate parameter for each of said first set of frequency bands using said first channel estimate parameters; and
assigning said first set of frequency bands to multiple subscriber stations in accordance with said second channel estimate parameters.
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Abstract
Method and apparatus to perform channel estimation for a wireless communication system are described.
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Citations
56 Claims
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1. A method, comprising:
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receiving a first preamble on a periodic basis, said first preamble having a first set of pilot tones corresponding to a first set of frequency bands from a first subscriber station over an orthogonal frequency division multiple access air interface;
estimating a first channel estimate parameter for each of said first set of frequency bands using said corresponding first set of pilot tones;
estimating a second channel estimate parameter for each of said first set of frequency bands using said first channel estimate parameters; and
assigning said first set of frequency bands to multiple subscriber stations in accordance with said second channel estimate parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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receiving a signal to send an uplink preamble on a periodic basis from a subscriber station to a base station over an orthogonal frequency division multiple access air interface, said uplink preamble comprising a set of pilot tones corresponding to multiple frequency bands allocated to said base station; and
sending said uplink preamble on said periodic basis to said base station. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A base station, comprising:
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a receiver to receive a preamble on a periodic basis, said preamble having a set of pilot tones corresponding to a set of frequency bands communicated in accordance with an orthogonal frequency division multiple access air interface, said receiver to include a channel estimator to receive said pilot tones and estimate a first set of channel estimate parameters for said frequency bands using said pilot tones, translate said first set of channel estimate parameters to a second set of channel estimate parameters, and output said second set of channel estimate parameters; and
control logic to connect to said receiver, said control logic to receive said second set of channel estimate parameters and assign said first set of frequency bands to multiple subscriber stations in accordance with said second channel estimate parameters. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A subscriber station, comprising:
a transceiver to operate in accordance with an orthogonal frequency division multiple access air interface, said transceiver to transmit an uplink preamble in a periodic manner over an uplink channel to a base station. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A system, comprising:
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a base station having a transceiver arranged to operate in accordance with an orthogonal frequency division multiple access air interface, said base station to send a control message to instruct a subscriber station to periodically send a preamble having a set of pilot tones corresponding to a set of frequency bands; and
a first subscriber station having a transceiver arranged to operate in accordance with said orthogonal frequency division multiple access air interface, said first subscriber station to receive said control message and send a response message to said base station in response to said control message, said first subscriber station to periodically send a preamble with said set pilot tones corresponding to said set of frequency bands. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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Specification