Signal Conditioning with Almost No Multiplications via Filter Sharpening

Filter sharpening creates a filter network using the same computationally simple filter or selections from a set of computationally simple filter. Applications include high-quality signal conditioning using fixed-point arithmetic and only a handful of mostly add/subtract arithmetic operations to compute each output sample value. Applied to electrocardiogram baseline wander removal, for example, the highpass filter has 3 dB corner at 0.25 Hz and better than 40 dB attenuation, yet meets stringent EC-13 medical standard performance constraints.