DSHOT and RPM Filter
DSHOT is a digital ESC protocol. When used bidirectionally, it feeds motor RPM back to the flight controller, enabling the RPM filter — the single biggest improvement to motor noise rejection in modern Betaflight tunes. For the byte-level view of how the frames and eRPM telemetry are encoded on the wire, see DSHOT on …
Read MoreFundamental operation for LTI systems and filtering. Definition Continuous-Time
$$ y(t) = (x * h)(t) = \int_{-\infty}^{\infty} x(\tau) h(t - \tau) d\tau $$Discrete-Time
$$ y[n] = (x * h)[n] = \sum_{k=-\infty}^{\infty} x[k] h[n - k] $$Physical Interpretation Convolution represents the output of an LTI system: $x[n]$: …
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