Verified on a 2nd MM-Fi task: 27-class action recognition (which MM-Fi
never benchmarked for WiFi; only published baseline WiDistill 34%). In-domain
88% (leaky); cross-subject zero-shot collapses to ~10%; few-shot calibration
rescues 10->76% (1000 samples). Same mechanism as pose -> few-shot in-room
calibration is the universal WiFi-sensing generalization answer, not a pose
quirk.
Co-Authored-By: claude-flow <ruv@ruv.net>
Decisive capstone: cross-environment (unseen room+people) zero-shot
10.6%, but 5 calibration samples/person -> 60%, 200 -> 73%. The hard
frontier is calibration-soluble, MORE dramatically than cross-subject
(+62.5 vs +12 at K=200). The unsolved-frontier framing was a zero-shot
artifact. Reframes generalization: ship few-shot calibration, not
zero-shot invariance. Recommend accepting ADR-150 re-scoped around the
calibration mechanism.
Co-Authored-By: claude-flow <ruv@ruv.net>
Compared per-room calibration methods at K=200: LoRA rank-8 recovers
63.6->72.5% (SOTA-level) with just 11K params (~11KB), 0.5% the model
size. Validates the ship-base-once + tiny-per-room-adapter mechanism for
the RuView calibration service. Accuracy/size knob documented.
Co-Authored-By: claude-flow <ruv@ruv.net>
Measured cross-subject PCK vs N training subjects: 4->8 = +21pts, but
24->32 = +0.45pt. Saturates ~64%, ~19pt below in-domain. Correction to
'more data': subject-count returns vanish past ~16-20; the residual is
device/room/protocol shift. Re-scope phase-1 capture around DIVERSITY
(rooms/devices/protocols) + few-shot target adaptation, not headcount.
Co-Authored-By: claude-flow <ruv@ruv.net>
Measured all near-term levers on the official MM-Fi cross-subject split:
- mixup+TTA+ensemble = best at 64.92% (+0.9 over doc 64.04)
- pose-contrastive foundation pretrain: estimated +5..+12, MEASURED -2.3
(SupCon loss pinned at ln(B) across K/BS/seeds -> same-pose CSI is not
contrastively alignable across subjects)
- instance-norm+SpecAugment -4.6; CORAL/DANN ~0
Conclusion: the 18-pt in-domain<->cross-subject gap is fundamental subject
shift, not algorithmic. Promotes multi-subject data collection to the primary
lever; recommends re-scoping ADR-150 phase 1 around capture.
Co-Authored-By: claude-flow <ruv@ruv.net>
ruv