adaptive-filtering

16 notes carry this tag — 9 claims, 3 questions, 4 captures. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Did commercial deployment of Lucky's adaptive equalizer raise voiceband data rates to 9600 bps (4x the ~2400 ceiling), and is that figure in any primary source?

capture promoted 2026-08-17 · adaptive-filtering, bell-labs, telecommunications, signal-processing, history-of-technology
The earliest documented commercial 9600 bps voiceband modem was Codex Corporation's QAM-based product (October 1971), credited by Codex's own John Pugh — not to Lucky or Bell Labs

claim seedling Tier 2 2026-08-17 · adaptive-filtering, bell-labs, telecommunications, history-of-technology, modems
Lucky's 1965 BSTJ paper names no post-equalizer data rate; his 1967 paper's introduction, the only portion read, likewise names no rate figure

claim seedling Tier 1 2026-08-17 · adaptive-filtering, bell-labs, telecommunications, primary-source-verification, history-of-technology
The popular claim that Lucky's equalizer enabled 9600 bps traces to an unsigned, uncited IEEE ComSoc timeline, not a primary source

claim seedling Tier 3 2026-08-17 · adaptive-filtering, bell-labs, telecommunications, quant-verification, primary-source-verification
Robert Lucky's own 2006 first-person retrospective essay on inventing the adaptive equalizer exists but is paywalled, with no open-access copy found

claim seedling Tier 4 2026-07-23 · adaptive-filtering, bell-labs, lucky, lms-algorithm, priority-and-independent-discovery
Does Robert Lucky's own oral history or writing say whether he knew of Widrow-Hoff's 1960 LMS work before his 1965 equalizer paper? — his primary sources remain inaccessible; question stays unverified

capture promoted 2026-07-22 · adaptive-filtering, bell-labs, widrow, lucky, lms-algorithm
Lucky's 1965 Bell Labs equalizer paper cites no Widrow-Hoff work in its four-entry bibliography

claim seedling Tier 1 2026-07-21 · adaptive-filtering, bell-labs, widrow, lucky, argument-from-silence
The evidence favors Lucky's 1965 equalizer as an independent invention from Widrow-Hoff LMS, but the case rests entirely on Widrow's side — Lucky's own account of awareness is still unobtained

claim seedling Tier 1 2026-07-21 · adaptive-filtering, bell-labs, widrow, lucky, lms-algorithm
Widrow's own retrospectives describe Lucky's Bell Labs equalizer as an independently developed, different algorithm, with LMS entering Bell Labs' adaptive-modem work only afterward

claim seedling Tier 1 2026-07-21 · adaptive-filtering, bell-labs, widrow, lucky, lms-algorithm
Does Robert Lucky's own oral history or writing say whether he knew of Widrow-Hoff's 1960 LMS work before writing his 1965 Bell Labs equalizer paper?

question open 2026-07-21 · adaptive-filtering, bell-labs, widrow, lucky, lms-algorithm
Were Lucky's (Bell Labs) and Widrow's (Stanford) adaptive-filter groups aware of each other in the mid-1960s, or did they converge independently?

capture promoted 2026-07-19 · adaptive-filtering, bell-labs, widrow, lms-algorithm, signal-processing
Robert Lucky's 1965 adaptive equalizer broke the telephone-line 'distortion barrier' using the same steepest-descent adaptive-filter logic as Widrow's LMS

capture promoted Tier 1 2026-07-09 · adaptive-filtering, bell-labs, telecommunications, signal-processing, history-of-technology
Lucky's 1965 automatic equalizer set a transversal filter's tap gains by steepest-descent minimization during a training period of known test pulses

claim seedling Tier 1 2026-07-09 · adaptive-filtering, bell-labs, telecommunications, signal-processing, lms-algorithm
Intersymbol interference, not noise, imposed a ~2400 bits-per-second 'distortion barrier' on early-1960s voiceband telephone data

claim seedling Tier 1 2026-07-09 · adaptive-filtering, bell-labs, telecommunications, signal-processing, history-of-technology
Were Lucky's (Bell Labs) and Widrow's (Stanford) adaptive-filter groups aware of each other in the mid-1960s, or did they converge on steepest-descent transversal filters independently?

question open 2026-07-09 · adaptive-filtering, bell-labs, widrow, lms-algorithm, signal-processing
Did commercial deployment of Lucky's adaptive equalizer raise voiceband data rates to 9600 bps (4× the ~2400 ceiling), and is that figure in any primary source?

question open 2026-07-09 · adaptive-filtering, bell-labs, telecommunications, primary-source-verification, quant-verification