Systems and methods for reducing noise in ADSL transmissions
First Claim
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1. A method for processing asymmetric digital subscriber line (ADSL) signals, comprising:
- receiving a signal comprising a continuous ADSL signal and transient noise;
applying a wavelet transform operation to the received signal;
estimating the signal level in wavelet space by way of the equation
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Abstract
A system (242) processes asymmetric digital subscriber line (ADSL) signals. The system (242) receives a signal that includes an ADSL signal and transient noise (230). The system (242) isolates the transient noise (230) in the signal and retrieves the ADSL signal from the signal using the isolated transient noise (230).
15 Citations
10 Claims
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1. A method for processing asymmetric digital subscriber line (ADSL) signals, comprising:
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receiving a signal comprising a continuous ADSL signal and transient noise; applying a wavelet transform operation to the received signal; estimating the signal level in wavelet space by way of the equation
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2. A method for processing an asymmetric digital subscriber line (ADSL) signal, comprising:
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receiving the signal comprising a continuous ADSL signal and transient noise; isolating the transient noise in the signal by; applying wavelet processing to the signal to obtain a wavelet processed signal, estimating the signal level in wavelet space by way of the equation - View Dependent Claims (3, 4)
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5. A system for processing asymmetric digital subscriber line (ADSL) signals, comprising:
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means for receiving one or more signals, each one of the one or more signals comprising a continuous ADSL signal and transient noise; means for detecting the noise in the one or more signals including; means for applying wavelet transform processing to the signal to produce a plurality of wavelet coefficients, means for estimating the signal level in wavelet space by way of; - View Dependent Claims (6)
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7. A system for processing an asymmetric digital subscriber line (ADSL) signal, comprising:
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logic configured to receive the signal comprising a continuous ADSL signal and transient noise; logic configured to isolate the transient noise in the signal using a multi-scale transformation operation by being configured to apply wavelet processing to the signal to obtain a wavelet processed signal, estimate the signal level in wavelet space by way of the equation - View Dependent Claims (8)
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9. A system for processing an asymmetric digital subscriber line (ADSL) signal, comprising:
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logic configured to receive the signal comprising a continuous ADSL signal and transient noise; and logic configured to suppress the noise in the signal using a wavelet transformation operation including; logic configured to isolated the noise by;
(1) applying wavelet processing to the signal to obtain a wavelet processed signal, (2) estimating the signal level in wavelet space, (3) using the signal level estimate to determine an amplitude threshold, (4) applying the amplitude threshold to the wavelet processed signal, (5) discarding a portion of the wavelet processed signal at or below the threshold to obtain a resulting signal, and (6) applying inverse wavelet processing to the resulting signal to obtain the isolated noise; andlogic configured to subtract the isolated noise from the signal to retrieve the continuous ADSL signal; wherein the logic for estimating signal level in wavelet space relies on the equation
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10. A noise suppression device comprising:
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first logic configured to receive a signal comprising a continuous asymmetric digital subscriber line (ADSL) signal and transient noise; second logic configured to isolate the noise in the received signal wherein, when isolating the noise, the second logic is configured to; apply wavelet processing to the received signal to obtain a wavelet processed signal, estimate the signal level in wavelet space by way of the equation
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Specification