| Patent Number |
Title Of Patent |
Date Issued |
| 7613985 |
Hierarchical trellis coded modulation |
November 3, 2009 |
| A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code |
| 7555052 |
Method and system for a turbo trellis coded modulation scheme for communication systems |
June 30, 2009 |
| Method and System for evaluating a turbo-coding scheme suitable for VDSL2 systems. The scheme is a Turbo-Trellis Coded Modulation TTCM that makes use of a Parallel Concatenated Convolutional Code (PCCC) including an inner Latin square/rectangular matrix of Random sequence pattern Int |
| 7496135 |
System and method for selectable mask for LDSL |
February 24, 2009 |
| The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatica |
| 7460649 |
Method and apparatus for single end loop testing for DSL provisioning and maintenance |
December 2, 2008 |
| A method and apparatus for single end loop testing for DSL provisioning and maintenance provides testing of the DSL loop using digital techniques including frequency compensation, matched filtering and median filtering, to remove strong background and enhance desired signal for peak |
| 7457368 |
Multilevel channel coding in ADSL |
November 25, 2008 |
| Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset |
| 7457353 |
Method and system for mitigating Fourier transform side lobes |
November 25, 2008 |
| The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other "victim" frequencies. The family of frequency methods referred |
| 7406126 |
Implementation of smart DSL for LDSL systems |
July 29, 2008 |
| Various embodiments for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. |
| 7400710 |
MIMO dynamic PSD allocation for DSL networks |
July 15, 2008 |
| A system and method for multiple inputs, multiple outputs (MIMO) PSD allocation in a DSL system is disclosed. In some embodiments, the method may comprise monitoring system performance by performing a multi-ended line test (MELT), processing the MELT and allocating PSD based on at le |
| 7372899 |
Reduced symbol rate handshake signaling in ADSL systems |
May 13, 2008 |
| In an asynchronous digital subscriber line (ADSL) system comprising a central office High Speed ADSL Terminating Unit (HSTU-C) in bi-directional discrete multitone (DMT) communication with a remote High Speed ADSL Terminating Unit (HSTU-R), a method for improving handshake detection |
| 7295603 |
Method and system for virtual exchange reference impact (VERI) for use in mixed spectrum managem |
November 13, 2007 |
| A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g |
| 7272172 |
System and method for selectable mask for LDSL |
September 18, 2007 |
| The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatica |
| 7216267 |
Systems and methods for multistage signal detection in mimo transmissions and iterative detectio |
May 8, 2007 |
| Systems and methods for multi-stage signal detection in MIMO transmission including Bernoulli-Gaussian detection are provided. A multistage iterative signal decoder is provided that exploits the property that in a relatively simply decoding scheme such as mean square error (MSE) or z |
| 6999504 |
System and method for canceling crosstalk |
February 14, 2006 |
| A method and apparatus are disclosed for reducing crosstalk in a telecommunication system. Broadly, the present invention utilizes a common mode signal to obtain additional information that can be used to better approximate the transmitted signal (by approximating and canceling cross |
