US Patent No: 8,045,703
Number of patents in Portfolio can not be more than 2000
Apparatus and method for echo-cancellation
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Oct 25, 2011
Issued date -
May 19, 2003
filing date -
10/514,689
serial no -
In Force
status
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Abstract
There is disclosed a multi-carrier transceiver system for use in echo cancellation. The transceiver system is arranged to generate from input data a multicarrier transmit signal comprising a plurality of multi-carrier data blocks. The transceiver system also has a multi-carrier signal receiver responsive to an input multi-carrier receive signal received from a remote signal transmitter. An echo canceller is arranged to generate from a pair of multi-carrier data blocks (u) a set of frequency-domain echo parameters for use in generating an echo signal, to generate the echo signal using the frequency-domain echo parameters, and to input the echo signal to the multi-carrier signal receiver for use in generating an echo-cancelled receive signal from the input receive signal and the echo signal.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,285,474 Method for equalizing a multicarrier signal in a multicarrier communication system | 336 | 1992 | |
| 5,317,596 Method and apparatus for echo cancellation with discrete multitone modulation | 99 | 1992 | |
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| 6,781,965 Method and apparatus for echo cancellation updates in a multicarrier transceiver system | 3 | 2000 | |
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| 5,217,596 Electrode probe for use in aqueous environments of high temperature and high radiation | 15 | 1991 | |
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| 6,519,291 Reduction of interference in discrete multi-tone (DMT) based communications systems | 42 | 1998 | |
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| 6,473,409 Adaptive filtering system and method for adaptively canceling echoes and reducing noise in digital signals | 50 | 1999 | |
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| 6,023,719 Signal processor and method for fast Fourier transformation | 4 | 1997 | |
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| 5,281,474 Heat-sensitive adhesive sheet and information recorded material using the same | 9 | 1991 | |
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| 4,903,247 Digital echo canceller | 50 | 1988 | |
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| 2003/0112,887 Method and system for implementing weighted vector error echo cancellers | 8 | 2001 | |
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