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US 6,272,660 B1Granted
Screening for errors in data transmission systems
AssigneeAgere Systems Guardian Corp.
InventorsBrian Chen, Carl-Erik Wilhelm Sundberg
Life of this patent
Estimating the term…
Abstract
The likelihood of significant errors in a decoded sequence is determined based on at least one criterion that is both extrinsic and intrinsic to the decoded sequence. In particular, this determination is preferably made by comparing a signal corresponding to the decoded sequence with a so-called error mitigation signal.
Claims40
A method comprising the steps of
- receiving a sequence of symbols,
- generating a decoded data sequence corresponding to said received sequence, and
- determining a likelihood of significant errors in said decoded data sequence based on information extrinsic to and information intrinsic to said decoded data sequence.
A method comprising the steps of
- generating a decoded data sequence corresponding to a received first signal,
- encoding said decoded data sequence to generate a corresponding second signal,
- forming a decision, as a function of said first signal and said second signal, as to whether a likelihood of significant errors in said decoded data sequence should be determined, and
- responsive to an affirmative such decision, determining said likelihood based on at least one criterion that is a function of both said decoded sequence and information exclusive of said decoded sequence, and applying said decoded data sequence to an output unless it is determined that there is a likelihood of significant errors.
1 more element
A method comprising the steps of
- generating a decoded data sequence corresponding to a received sequence of symbols, said decoded data sequence having an associated path metric,
- forming a decision, as a function of said path metric, as to whether a likelihood of significant errors in said decoded data sequence should be determined, and
- responsive to an affirmative such decision, determining said likelihood based on at least one criterion that is a function of both said decoded sequence and information exclusive of said decoded sequence, and applying said decoded data sequence to an output unless it is determined that there is a likelihood of significant errors.
A method comprising the steps of
- receiving a sequence of symbols,
- generating a number of decoded data sequences corresponding to said received sequence,
- determining a likelihood of significant errors in at least one of said number of decoded data sequences based on at least one criterion that is both intrinsic and extrinsic to said respective decoded data sequence, and
- selecting and applying to an output one of said decoded data sequences unless it is determined that there is a likelihood of significant errors in said one of said decoded data sequences.
1 more element
Apparatus comprising
- means for receiving a sequence of symbols,
- means for generating a decoded data sequence corresponding to said received sequence, and
- means for determining a likelihood of significant errors in said decoded data sequence based on at least one criterion that is both intrinsic and extrinsic to said decoded data sequence.
Apparatus comprising
- means for generating a first signal corresponding to a decoded sequence of symbols,
- means for generating an error mitigation signal, said error mitigation signal being an estimate of said first signal, and
- means for determining a likelihood of significant errors in said decoded sequence as a function of a comparison between said error mitigation signal with said first signal.
A method comprising the steps of
- receiving a decoded sequence of symbols,
- performing analysis on said decoded sequence to determine whether said decoded sequence is acceptable as correct, said analysis being a function solely of said decoded sequence, or solely of information exclusive of said decoded sequence,
- if said decoded sequence is determined to be acceptable, screening said decoded sequence to determine the likelihood of significant errors undetected by said analysis, said screening being a function of said decoded sequence and information exclusive of said decoded sequence, and
- applying said decoded sequence to an output unless said screening determined that there is a likelihood of undetected errors.
1 more element
A method comprising the steps of
- receiving a number of decoded sequences of symbols,
- performing analysis on said decoded sequences to select one of said sequences, said analysis being a function (a) solely of said decoded sequence, (b) solely of information derivable from said decoded sequence, (c) solely of said decoded sequence and information derivable from said decoded sequence, or (d) solely of information exclusive of said decoded sequence,
- screening said selected decoded sequence to determine the likelihood of significant errors, said screening being a function of said decoded sequence and information exclusive of said decoded sequence, and
- applying said decoded sequence to an output unless said screening determined that there is a likelihood of significant errors.
1 more element
A method comprising the steps of
- receiving a decoded sequence of symbols,
- performing analysis on said decoded sequence to determine whether said decoded sequence is acceptable as correct, said analysis being based on criteria that are either solely intrinsic or solely extrinsic to said decoded sequence,
- if said decoded sequence is determined to be acceptable, screening said decoded sequence to determine the likelihood of significant errors being undetected by said analysis, said screening being based on at least one criterion that is both extrinsic and intrinsic to said decoded sequence, and
- applying said decoded sequence to an output unless said screening determined that there is a likelihood of significant errors.
1 more element
A method comprising the steps of
- receiving a decoded data sequence and a first signal corresponding to said decoded data sequence,
- generating an error mitigation signal, said error mitigation signal being an estimate of said first signal, and
- determining a likelihood of significant errors in said decoded data sequence as a function of said first signal and said error mitigation signals.
A method comprising the steps of
- receiving a decoded data sequence,
- receiving an error mitigation signal, said error mitigation signal being an estimate of a signal corresponding to said decoded data sequence, and
- determining a likelihood of significant errors in said decoded data sequence as a function of said decoded data sequence and said error mitigation signal.
Dependencies are inferred from the claim text.