ewma.hpp File Reference

Exponentially Weighted Moving Average filter. More...

#include <cstdint>

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Classes
class	sbl::primitives::math::Ewma

Namespaces
namespace	sbl
	Root namespace for all Sound Byte Libs functionality.
namespace	sbl::primitives
	Essential data structures and algorithms.
namespace	sbl::primitives::math

Detailed Description

Exponentially Weighted Moving Average filter.

Integer-only EWMA with Q16 internal state for sub-LSB precision. Uses power-of-2 shift for the smoothing factor (no division). Suitable for Cortex-M0+ (no FPU required).

Alpha = 1 / 2^shift: shift=1 → alpha=1/2 (fast tracking, little smoothing) shift=3 → alpha=1/8 (good default for pots) shift=5 → alpha=1/32 (heavy smoothing)

Usage: sbl::primitives::math::Ewma filter(3); uint16_t smoothed = filter.update(raw_adc_value);

Definition in file ewma.hpp.