Patent ID: 6079045
Filing Date: 2000-06-20
Classification: H04L

Abstract:
Method for reproducing digital symbols carried by an input signal, the input signal comprising at least two bits, crossing a zero level at least twice, and continuing in time for a plurality of detection instants, the method comprising the steps of:a) determining a first zero crossing error that indicates an error about a first of the plurality of detection instants for the first zero crossing of the input signal;b) determining a second zero crossing error that indicates an error about a second of the plurality of detection instants for the second zero crossing of the input signal;c) determining, relative to a current detection instant that is nearest the second zero crossing but is later in time than the second zero crossing, a first relative position error, the first relative position error relating the current detection instant to a detection instant that is later in time but closest to a zero crossing and that is closest of the plurality of detection instants to the current detection instant;d) determining, relative to the current detection instant, a second relative position error, the second relative position error relating the current detection instant to a detection instant that is earlier in time but closest to a zero crossing and that is closest of the plurality of detection instants to the current detection instant;e) determining, from the first and second zero crossing errors and the first and second relative position errors, if a bit or bits of the at least two bits are erroneous; andf) if a bit or bits of the at least two bits are erroneous, correcting the bit or bits of the at least two bits that are erroneous.