Title:
Decision feedback equalizer and precoder ramping circuit
Document Type and Number:
WIPO Patent Application WO2001013516
Kind Code:
A3
Abstract:
A feedforward filter has a plurality of feedforward filter taps, including a feedforward filter reference tap. The reference tap of the feedforward filter is positioned proximate a center position of the feedforward filter. A ramping circuit assembly has an input port configured to receive at least one decision feedback filter tap coefficient from a decision feedback filter. A coefficient ramping circuit is configured to provide a ramped output for at least one of the decision feedback filter tap coefficients. The ramped output is varied over time from a first value to a second value. The second value is dependent upon the value of a decision feedback filter tap coefficient. An output port of the ramping circuit assembly is configured to communicate information representative of the ramped output(s) to a precoder.
Inventors:
JAFFE STEVEN T (US)
JOSHI ROBINDRA (US)
JONES DAVID (US)
LIN THUJI SIMON (US)
JOSHI ROBINDRA (US)
JONES DAVID (US)
LIN THUJI SIMON (US)
Application Number:
PCT/US2000/022017
Publication Date:
August 23, 2001
Filing Date:
August 11, 2000
Export Citation:
Assignee:
JAFFE STEVEN T (US)
JOSHI ROBINDRA (US)
JONES DAVID (US)
LIN THUJI SIMON (US)
BROADCOM CORP (US)
JOSHI ROBINDRA (US)
JONES DAVID (US)
LIN THUJI SIMON (US)
BROADCOM CORP (US)
International Classes:
H03H21/00; H04L25/03; (IPC1-7): H03H21/00; H04L25/03
Domestic Patent References:
| WO1999005807A1 | 1999-02-04 | |||
| WO2000013314A1 | 2000-03-09 |
Foreign References:
| US5321512A | 1994-06-14 | |||
| US4985902A | 1991-01-15 |
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