INVERSION OF CHANNEL DISTORTION BY ADAPTIVE WAVELET LIFTING
First Claim
Patent Images
1. An apparatus for correcting channel distortion of a known signal sent by a transmitter and received by a receiver, the apparatus comprising:
- a transmitter filter bank for decomposing the message sent by the transmitter, the decomposition according to the filter bank, the decomposition comprising transmitter filter coefficients;
a receiver filter bank for decomposing the message received by the receiver;
the decomposition according to the receiver filter bank, the decomposition comprising receiver filter coefficients;
a novelty signal computation device for computing the novelty signal given the transmitted signal and the received signal;
a novelty signal filter coefficient computation device for computing the receiver filter coefficients that represent the novelty signal; and
a transmitter coefficient update device for updating the transmitter filter coefficients according to the coefficients of the novelty signal;
whereby the channel distortion is corrected by the updated transmitter filter coefficients.
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Accused Products
Abstract
A method for inverting telecommunication channel distortion by adaptive wavelet lifting. The distortion signal is analyzed using wavelet lifting and the inverse filter is computed. Coefficients of the inverse filter are used to either compute a transmission pre-filter or to update the transmitted message.
20 Citations
1 Claim
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1. An apparatus for correcting channel distortion of a known signal sent by a transmitter and received by a receiver, the apparatus comprising:
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a transmitter filter bank for decomposing the message sent by the transmitter, the decomposition according to the filter bank, the decomposition comprising transmitter filter coefficients; a receiver filter bank for decomposing the message received by the receiver;
the decomposition according to the receiver filter bank, the decomposition comprising receiver filter coefficients;a novelty signal computation device for computing the novelty signal given the transmitted signal and the received signal; a novelty signal filter coefficient computation device for computing the receiver filter coefficients that represent the novelty signal; and a transmitter coefficient update device for updating the transmitter filter coefficients according to the coefficients of the novelty signal; whereby the channel distortion is corrected by the updated transmitter filter coefficients.
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Specification
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Current AssigneeXW LLC
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Original AssigneeXtendwave, Inc.
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InventorsOrr, David E.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current455/63.1
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CPC Class CodesH04L 2025/03528 Other transform domainH04L 27/0004 using waveletsH04L 5/0008 Wavelet-division
