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US 2006/0141935 A1Published application
Joint interference cancellation of pilot, overhead and traffic channels
AssigneeQUALCOMM Incorporated
InventorsJilei Hou, Henry Pfister, John Smee, Stefano Tomasin
Life of this patent
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Abstract
A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.
Claims29
A method comprising:
- receiving samples of signals transmitted from a plurality of access terminals;
- canceling overhead channel data from the received samples;
- and
- after canceling the overhead channel data, processing the samples to obtain traffic data sent by at least one of the access terminals.
1 more element
A method comprising:
- receiving samples of signals transmitted from a plurality of access terminals, the samples comprising pilot channel data, overhead channel data and traffic channel data;
- and
- canceling at least a portion of the pilot channel data, overhead channel data and traffic channel data in the samples.
A base station comprising:
- a memory configured to store data samples of signals received from a plurality of access terminals, the samples comprising pilot channel data, overhead channel data and traffic channel data;
- a channel estimator configured to determine channel estimates for the plurality of access terminals;
- a selector configured to select a set of one or more access terminals from the plurality of access terminals;
- a demodulator configured to demodulate overhead channel data and traffic channel data for the selected set of one or more access terminals;
- a decoder configured to decode demodulated overhead channel data and traffic channel data and determine which overhead channel data and traffic channel data decoded correctly;
- a reconstruction unit configured to reconstruct overhead channel data and traffic channel data for the correctly decoded overhead channel data and traffic channel data, the reconstruction unit being further configured to reconstruct pilot channel data using the channel estimates;
- and
- a subtractor configured to subtract at least a portion of the reconstructed pilot channel data, reconstructed overhead channel data, and reconstructed traffic channel data from the samples stored in the memory.
5 more elements
Dependencies are inferred from the claim text.