US 2003/0115542 A1 · System and method for recovering and deserializing a high data rate bit stream

Abstract

A deserializer that deserializes a high data rate bit stream to extract a set of bits contained therein includes a data sampler, a serial-to-parallel converter, a windowing block, and a phase error detection block. The data sampler over samples the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream. The serial-to-parallel converter couples to the data sampler and converts the serial group of samples into a parallel group of samples. The windowing block receives the parallel group of samples and produces output buts corresponding to the set of bits. The phase error detection block couples to the windowing block, detects errors in the alignment of the overlapping sampling windows of the windowing block, and directs the windowing block to adjust the operation. The phase error detection block and the windowing block compensate for bits stream jitter and intersymbol interference.

Claims41

Dependent claims

A deserializer for deserializing a high data rate bit stream to extract a set of bits, the deserializer comprising:

a data sampler that oversamples the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream;
a serial to parallel converter coupled to the data sampler that converts the serial group of samples into a parallel group of samples, wherein the parallel group of samples corresponds to the set of bits, at least one bit preceding the set of bits, and at least one bit subsequent to the set of bits;
a windowing block coupled to the serial to parallel converter that includes a plurality of a overlapping sampling windows, wherein each overlapping sampling window receives a plurality of samples that correspond to a respective target bit and adjacent bits and produces a single bit output, wherein each single bit output represents a corresponding one of the set of bits;
and
a phase error detection block coupled to the windowing block that detects errors in the alignment of the overlapping sampling windows of the windowing block and that directs the windowing block to adjust operation of the plurality of overlapping sampling windows to produce the single bit outputs.

2 more elements

A deserializer for deserializing a high data rate bit stream to extract a set of bits, the deserializer comprising:

a data sampler that oversamples the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream, wherein the serial group of samples also corresponds to bits of the high data rate bit stream adjacent the set of bits of the high data rate bit stream;
a serial to parallel converter coupled to the data sampler that converts the serial group of samples into a parallel group of samples, wherein the parallel group of samples corresponds to the set of bits, at least one bit preceding the set of bits, and at least one bit subsequent to the set of bits;
a windowing block coupled to the serial to parallel converter that includes a plurality of overlapping sampling windows, wherein each overlapping sampling window receives a plurality of samples that correspond to a respective target bit and adjacent bits and produces a single bit output, wherein each single bit output represents a corresponding one of the set of bits;
a phase error detection block coupled to the windowing block that detects errors in the alignment of the overlapping sampling windows of the windowing block and that directs the windowing block to adjust operation of the plurality of overlapping sampling windows to produce the single bit outputs;
wherein the set of bits includes a most significant bit and a least significant bit;
wherein an overlapping sampling window that corresponds to a most significant bit of the set of bits also receives samples corresponding to a bit adjacent the most significant bit of the set of bits;
and
wherein an overlapping sampling window that corresponds to a least significant bit of the set of bits also receives samples corresponding to a bit adjacent the least significant bit of the set of bits.

5 more elements

A deserializer for deserializing a high data rate bit stream to extract a set of bits, the deserializer comprising:

a data sampler that oversamples the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream;
a serial to parallel converter coupled to the data sampler that converts the serial group of samples into a parallel group of samples, wherein the parallel group of samples corresponds to the set of bits, at least one bit preceding the set of bits, and at least one bit subsequent to the set of bits;
a windowing block coupled to the serial to parallel converter that includes a plurality of overlapping sampling windows, wherein each overlapping sampling window receives a plurality of samples that correspond to a respective target bit and adjacent bits and produces a single bit output, wherein each single bit output represents a corresponding one of the set of bits;
a phase error detection block coupled to the windowing block that detects errors in the alignment of the overlapping sampling windows of the windowing block and that directs the windowing block to adjust operation of the plurality of overlapping sampling windows to produce the single bit outputs;
wherein for each overlapping sampling window:
the windowing block produces a plurality of samples that are received by the phase error detection block;
the phase error detection block compares the plurality of samples to a plurality of sample patterns to determine whether the overlapping sampling window is misaligned with the respective target bit;
and
wherein the phase error detection block directs the windowing block to adjust operation of the plurality of overlapping sampling windows based upon a composite misalignment of the overlapping sampling windows.

6 more elements

A method for deserializing a high data rate bit stream to extract a set of bits, the method comprising:

oversampling the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream;
converting the serial group of samples into a parallel group of samples, wherein the parallel group of samples corresponds to the set of bits, at least one bit preceding the set of bits, and at least one bit subsequent to the set of bits;
for each of a plurality of overlapping sampling windows, receiving a plurality of samples that correspond to a respective target bit and adjacent bits and producing a single bit output, wherein each single bit output represents a corresponding one of the set of bits;
detecting errors in the alignment of the overlapping sampling windows;
and
adjusting operation of the plurality of overlapping sampling windows to produce the single bit outputs according to the errors in the alignment of the overlapping sampling windows.

3 more elements

A method for deserializing a high data rate bit stream to extract a set of bits, the method comprising:

oversampling the high data rate bit stream to produce a serial group of samples corresponding to the set of bits of the high data rate bit stream;
converting the serial group of samples into a parallel group of samples, wherein the parallel group of samples corresponds to the set of bits, at least one bit preceding the set of bits, and at least one bit subsequent to the set of bits;
for each of a plurality of overlapping sampling windows, receiving a plurality of samples that correspond to a respective target bit and adjacent bits and producing a single bit output, wherein each single bit output represents a corresponding one of the set of bits;
detecting errors in the alignment of the overlapping sampling windows;
adjusting operation of the plurality of overlapping sampling windows to produce the single bit outputs according to the errors in the alignment of the overlapping sampling windows;
wherein for each overlapping sampling window:
producing a plurality of windowed samples that are received by the phase error detection block;
and
comparing the plurality of samples to a plurality of sample patterns to determine whether the overlapping sampling window is misaligned with the respective target bit;
and
adjusting operation of the plurality of overlapping sampling windows based upon a composite misalignment of the overlapping sampling windows.

8 more elements

Dependencies are inferred from the claim text.

System and method for recovering and deserializing a high data rate bit stream

Life of this patent

System and method for recovering and deserializing a high data rate bit stream

Life of this patent

Abstract

Claims41