US 12,009,921 B2 · Spectral content detection for equalizing interleaved data paths

Abstract

A high-speed data receiver includes interleaver circuitry configured to divide a received data stream into a plurality of interleaved paths for processing, spectral content detection circuitry configured to derive spectral content information from data on each of the plurality of interleaved paths, sorting circuitry configured to bin the derived spectral content information according to energy levels, stream attribute determination circuitry configured to determine, based on sorted spectral content, one or more of path offsets of the interleaved paths, gain mismatch among interleaved paths, signal bandwidth mismatch and pulse width mismatch, and equalization circuitry configured to correct the one or more of the determined offsets, the determined gain mismatch and the determined signal width mismatch. Equalization circuitry may be configured to equalize a gain-normalized signal by separately adjusting respective bandwidth actuators of each respective interleaved path and respective pulse width actuators of each respective interleaved path.

Claims24

Dependent claims

A high-speed data receiver comprising:

interleaver circuitry configured to divide a received data stream into a plurality of interleaved data paths for processing;
spectral content detection circuitry configured to derive spectral content information from data on each of the plurality of interleaved data paths;
sorting circuitry configured to bin the derived spectral content information according to energy levels;
stream attribute determination circuitry configured to determine, based on sorted spectral content, one or more of path offsets of interleaved data paths in the plurality of interleaved data paths, gain mismatch among interleaved paths in the plurality of interleaved data paths, signal bandwidth mismatch and pulse width mismatch, the stream attribute determination circuitry comprising signal width mismatch detection circuitry configured to determine at least one of the signal bandwidth mismatch and the pulse width mismatch using a spectral shape function;
and
equalization circuitry configured to correct the one or more of the determined offsets, the determined gain mismatch and the determined signal width mismatch.

3 more elements

A method of equalizing interleaved data paths in a plurality of interleaved data paths in a high-speed data receiver, the method comprising:

deriving spectral content information from data on each interleaved data path in the plurality of interleaved data paths;
sorting the derived spectral content information into bins according to energy levels;
determining, based on sorted spectral content, one or more of path offsets of the interleaved data paths in the plurality of interleaved data paths, gain mismatch among the interleaved data paths in the plurality of interleaved data paths, signal bandwidth mismatch and pulse width mismatch, including at least determining mismatch in at least one of bandwidth and pulse width among the interleaved data paths in the plurality of interleaved data paths using a spectral shape function;
and
correcting the one or more of the determined path offsets, the determined gain mismatch and the determined signal width mismatch.

2 more elements

Dependencies are inferred from the claim text.

Spectral content detection for equalizing interleaved data paths

Life of this patent

Spectral content detection for equalizing interleaved data paths

Life of this patent

Abstract

Claims24