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Power spectral density masks for ADSL+

a power spectral density and mask technology, applied in the field of asynchronous digital subscriber line (adsl) systems, can solve the problems of relativly severe performance limitations placed on adsl implementation, and achieve the effect of improving handshake detection robustness

Inactive Publication Date: 2004-03-25
BROOKTREE BROADBAND HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides methods and systems for improving the performance and reach of ADSL in existing G.992.1 Recommendations without requiring the addition of new equipment or significant complications to existing systems. These methods and systems use the existing G.992.1 Recommendations and provide improvements through the use of overlap and non-overlap modes. The invention also provides a power spectral density (PSD) mask for spectral shaping of downstream transmissions in both the ADSL and far end cross talk (FEXT) bit maps. The PSD masks are useful for improving the performance and reach of ADSL in existing systems."

Problems solved by technology

For example, due to noise and other interference generated by these ISDN systems, as well as the potential adverse impact ADSL deployment may have on these existing systems, relatively severe performance limitations have been placed upon ADSL implementation in these regions.

Method used

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  • Power spectral density masks for ADSL+
  • Power spectral density masks for ADSL+
  • Power spectral density masks for ADSL+

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Embodiment Construction

[0167] The present invention sets forth exemplary systems and methods for modifying the existing G.992.1, G.992.2, and G.994.1 Recommendations as presented by the ITU-T for the purposes of increasing ADSL system performance and reach in geographic regions falling under the requirements of Annexes A and C to the G.992.1 Recommendation. In accordance with the present invention, such modifications relate to the implementation of signals having overlapping and non-overlapping frequency spectra, as well as manipulations of DBM and FBM implementations. The exemplary systems and methods described herein may be implemented in other contexts as appropriate without departing from the spirit or the scope of the present invention.

[0168] As an initial matter, it is heretofore submitted that the performance enhancing modifications of the present invention are fully supported by the current G.992.1 / G.992.2 standard specifications, thereby resulting in uncomplicated and rapid implementation. In par...

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Abstract

Disclosed herein are various power spectral density (PSD) masks for spectral shaping of an asynchronous digital subscriber line (ADSL) overlap and non-overlapped spectrums via an integrated digital services network (ISDN) or plain old telephone system (POTS).

Description

CROSS REFERENCE TO RELATED APPLICATIONS:[0001] The present invention claims benefit of U.S. Provisional Application No. 60 / 398,124, filed Jul. 25, 2002, and U.S. Provisional Application No. 60 / 399,135, filed Jul. 30, 2002, the entireties of which are incorporated by reference herein.FIELD OF THE PRESENT INVENTION[0002] The present invention relates generally to asynchronous digital subscriber line (ADSL) systems, and in particular, to systems and methods for improving transmission performance in such systems.BACKGROUND OF THE PRESENT INVENTION[0003] With the increasing popularity of the Internet and other content-heavy electronic communication systems, there has been a substantial need for reliable and affordable high bandwidth mediums for facilitating data transmissions between service providers and their customers. In relation to the requirement that such mediums be affordable to consumers, it was determined that the most cost-effective manner for providing service to customers wa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04J11/00H04J3/16H04L5/14H04L12/66H04L25/03H04L27/26
CPCH04L5/0046H04L5/0048H04L5/143H04L5/1438H04L5/16H04L27/2655H04L25/0286H04L25/03834H04L27/2608H04L27/2656Y02B60/45H04L12/66Y02D30/00
Inventor RAPPAPORT, ALBERTSORBARA, MASSIMO
Owner BROOKTREE BROADBAND HLDG
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