Initial phase-loading circuit for a fractionally-spaced linear equalizer
AssigneeLucent Technologies Inc.
InventorNaresh Ramnath Shanbhag
Life of this patent
Estimating the term…
Abstract
An initial phase-loading circuit (IPLC) for a fractionally-spaced linear equalizer (FSLE) includes a signal coupling component adapted to be coupled to the FSLE in a configuration so as to selectively introduce time-shifted discrete signals. The FSLE includes a set of initial filter tap coefficients that provide a discrete signal to the FSLE, perform discrete signal equalization using the FSLE at least until substantial convergence of the filter tap coefficients, and provide to the FSLE a time-shifted discrete signal to replace the previously provided discrete signal.
Claims20
An initial phase-loading circuit (IPLC) for a fractionally-spaced linear signal equalizer (FSLE), said circuit comprising:
- a source of time-shifted discrete signals;
- and
- a signal coupling component, coupled to said FSLE,
- that receives the time-shifted discrete signals from said source and selectively introduces the time-shifted discrete signals to said FSLE.
A communications system comprising:
- a receiver including a fractionally-spaced linear equalizer (FSLE) that includes an initial phase-loading circuit (IPLC), said IPLC including a signal coupling component that is coupled to said FSLE and selectively introduces time-shifted discrete signals to said FSLE.
An integrated circuit comprising:
- a fractionally-spaced linear equalizer (FSLE) including an initial phase-loading circuit (IPLC);
- said IPLC including:
- a signal coupling component that is coupled to said FSLE and selectively introduces time-shifted discrete signals to said FSLE.
A method of initializing a fractionally-spaced linear equalizer (FSLE) comprising the steps of:
- providing a discrete signal to the FSLE, the FSLE including a set of initial filter tap coefficients;
- performing discrete signal equalization using the FSLE at least until substantial convergence of the filter tap coefficients;
- and
- providing to the FSLE a time-shifted discrete signal to replace the previously provided discrete signal, the FSLE including the set of initial filter tap coefficients.
Dependencies are inferred from the claim text.