Simulation Validated

Sub-Picosecond Wireless Timing

"We don't cancel interference. We read it."

Chronometric interferometry turns intentional offset into timing information.

Now: reproducible femtosecond-scale estimator behavior in baseband LoS simulation.
Next: hardware loopback → short-range RF → multipath-robust sync.

10-15–10-12 s
Timing regime explored (simulation)
μm-scale
Equivalent path-length (illustrative)
5 GHz unlicensed
ISM/UNII in current sims

A clear path from simulation to hardware for 6G, TSN, and distributed sensing. Inquiries welcome.

This is

  • ✓ A reproducible estimator pipeline
  • ✓ Physics-bounded scaling behavior
  • ✓ Failure maps for LoS / ambiguity / multipath regimes

Not yet

  • ○ Field-validated at long range
  • ○ Multipath-complete
  • ○ A shipping timing module

Interactive Beat Note Visualizer

Experience how picosecond timing creates measurable phase shifts

Beat note we read (φ)
Jitter band from environment noise
Phase dial = measured offset
LIVE SIM MODE (baseband) Freeze to pause motion; change environments or distance to compare against the pinned frame.

Observe the Phase Shift (φ) dial. Wireless timing that starts to look like fiber (LoS simulation first; hardware validation underway).

0 ps ≈ 15 mm 200 ps

Slide to add path delay. Watch the jitter band swell or shrink as environments change.

Phase Shift (φ):
Phase Noise (σφ):
Distance Noise (σd):
Stability Status: SIMULATION
1. Pick an environment to set noise.
2. Add delay to see φ grow.
3. Read the dial: narrow band = locked, smeared band = chaos.
Defaults are conservative. Real RF adds impairments; the model includes toggles for them.

Understanding Femtosecond-Scale Timing

Three ways to think about what we measure

Distance intuition

In 1 fs, light travels ~0.3 μm (illustrative). We're operating at scales where path-length differences become measurable.

RF intuition

At GHz carriers, tiny phase shifts correspond to tiny time shifts. We exploit this relationship to extract timing from interference patterns.

Compute intuition

This lives below a single CPU clock tick — so we don't measure "time," we measure structured phase.

Hardware Blueprint

Professional-grade dev kit targeting sub-picosecond line-of-sight precision

Physical Stack (Top to Bottom)

1
Antenna Deck
Multi-band patch antennas on alignment rail
2
RF Front-End
Software-defined radio + RF chain
3
Reference Deck
GNSS-disciplined oscillator (reference distribution)
4
Compute Layer
Embedded SBC + FPGA accelerator
5
Power Base
12-15V DC input, LC filter, isolated rails
SDR Platform
Wideband SDR
Multi-channel, configurable IBW
Reference Clock
GNSS-Disciplined Oscillator
Standard timing outputs
RF Chain
fs-class
Simulation Achieved
LNA + BPF
Multi-band ISM/UNII
Compute
Embedded SBC + FPGA
Real-time signal processing
Performance
Sub-picosecond
Line-of-sight target
Cost (Pro)
<$5,000
COTS reference design

Performance Comparison

How Driftlock Choir compares to existing timing technologies

Driftlock Choir femtosecond-class (wireless)
White Rabbit ~10 ps (fiber)
Two-Way Satellite ~100 ps
GPS ~1 ns
Orders of magnitude better than GPS-based methods • approaching fiber-grade White Rabbit performance • delivered over commodity wireless RF.

How Chronometric Interferometry Works

Extracting femtosecond timing from radio frequency interference

01

Signal Generation

Two RF signals with a precise frequency offset (Δf is implementation-specific; selectable across a wide range depending on band, SNR, and architecture) are transmitted simultaneously

02

Beat Note Formation

Signals interfere upon reception, creating a low-frequency beat note whose phase encodes time-of-flight

03

Phase Extraction

Advanced signal processing extracts the beat note phase with extraordinary precision (σφ approaches fundamental limits)

04

Timing Calculation

Timing precision follows: στ = σφ / (2π · fcarrier), achieving femtosecond resolution

τ = φmeasured / (2π · fcarrier)
We measure the phase of a derived interference pattern, which encodes carrier-referenced timing information at rates amenable to digital processing.

Applications

Enabling next-generation synchronized systems and deep-tech businesses

6G JCAS Networks

Joint communication and sensing requires picosecond synchronization for coherent distributed radar

PNT-Degraded Environments

GPS-denied or GPS-unreliable scenarios demand alternative timing sources — indoor, underground, contested.

Distributed Sensing

VLBI radio telescopes, SAR imaging, and MIMO radar systems benefit from wireless femtosecond synchronization

Industrial TSN

Time-sensitive networking for robotics and automation without expensive fiber infrastructure

Financial Networks

High-frequency trading and market data feeds benefit from verifiable sub-nanosecond correlation across sites

Space Systems

Deep space communication, navigation, and inter-satellite links with extreme precision

What E1–E27 Tell Us

From validated physics to deployment-ready architectures and revenue lines

Physics & Scaling Laws Validated

E1–E3 & E17–E18 confirm the physics: sub-picosecond timing is theoretically bounded and achievable. Scaling laws (1/SNR, 1/f) are validated across 100+ test points, matching CRLB predictions.

Network-Scale Synchronization

E4–E7 & E16 identify stability limits. Simple consensus scales to ~30 nodes; hierarchical approaches enable 100+ nodes while maintaining picosecond precision.

Simulated Mobility & Multipath Stress

We model Doppler, clock noise, and multipath regimes — tracking when the estimator holds, degrades, or refuses. We don't pretend multipath is solved. We map where it breaks.

Toward Products & Revenue

E12–E13 & E21 focus on drift tracking, cost tiers, and MAC efficiency, directly informing dev kits, OEM modules, and SaaS nodes modelled in our 5-year financial projections.

Together, E1–E27 say: this isn’t a single clever demo, it’s an architecture that survives noise, scale, faults, motion, and clutter. The next chapters—E14/E15 hardware, PTP bridges, and FPGA acceleration—turn that architecture into deployable infrastructure.

Business Potential

Modeled outcomes are scenario-dependent

Modeled Outcomes

A range of outcomes exists — the constraint is hardware validation + channel robustness, not addressable demand.

Markets: 6G infrastructure, industrial TSN, coherent sensing, PNT-degraded scenarios.

Unit Economics (Illustrative)

SaaS timing nodes show favorable CAC payback and strong LTV/CAC ratios in early models — contingent on deployment density and churn assumptions.

What Determines Upside

Near-term: Hardware loopback results, multipath robustness
Mid-term: OEM partnerships, standards participation
Long-term: Density of deployed timing infrastructure

View modeling assumptions →

Adoption curves, pricing tiers, and milestone gates available on request. Detailed model shared under NDA.