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US 6,633,602 B2Granted
User equipment which uses pre-rotation before transmission
AssigneeInterDigital Technology Corporation
InventorJohn D. Kaewell
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Abstract
The present invention is a method and apparatus for reducing transmission errors by a user equipment (UE) when transmitting a communication signal. An RF communication signal is received at the UE and analyzed for errors. A correction signal is then generated based upon the analysis. Prior to transmission of the communication signal from the UE, the communication signal is corrected using the correction signal.
Claims1
A method for reducing transmission errors by a user equipment (UE) when transmitting a communication signal, comprising the steps of:
- receiving an RF communication signal at said UE;
- filtering said received signal to generate a filtered signal using a weighting signal;
- analyzing said received signal for errors further includes:
- despreading said filtered signal using a pilot signal;
- performing a hard decision on said despread filtered signal to generate symbol outputs;
- and
- determining a plurality of complex conjugates of said symbol outputs to generate a correction signal;
- wherein said correction signal removes a plurality of phase errors contained in a plurality of path values;
- demodulating said received signal to generate said plurality path values for each multipath component in said received signal;
- generating said correction signal based upon said analysis;
- mixing said path values with said correction signal to generate said weighting signal;
- and
- correcting said communication signal using said correction signal prior to transmission of said communication signal from said UE.
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Dependencies are inferred from the claim text.