telecommunications

8 notes carry this tag — 5 claims, 1 question, 2 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 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
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